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Groundwater Assessment for F006 Sludge Delisting 

Final Effluent Ponds 

BWX Technologies, Inc. 

Mount Athos Site 

Lynchburg, Virginia 

Prepared for: 

BWX Technologies, Inc. 

Lynchburg, Virginia 

Prepared by: 

Shaw Environmental & Infrastructure, Inc. 

312 Directors Drive 

Knoxville, Tennessee 37923 

July 2002 

Revision 0 
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Table of Contents

Page 

1.0 Purpose....................................................................................................................................1 

2.0 Objectives of the FEP Sludge Delisting Petition ....................................................................1 

 2.1 Delist FEP Sludge..........................................................................................................1 

 2.2 Clarify Regulatory Status of the FEPs...........................................................................2 

3.0 Background.............................................................................................................................2 

4.0 Use of Groundwater Monitoring Data in Delisting Petitions .................................................6 

5.0 Relevant Groundwater Monitoring Data ................................................................................7 

 5.1 FEP Groundwater Data..................................................................................................8 

 5.2 Landfill 1 Groundwater Data.......................................................................................10 

6.0 FEP Risk Assessment ...........................................................................................................11 

7.0 Conclusions...........................................................................................................................12 

8.0 Recommendations.................................................................................................................13 

9.0 References.............................................................................................................................14 

Tables 

Figures 
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List of Tables 

Table Title Follows Text 

3-1 Operating Histories of the Final Effluent Ponds 

5-1 Final Effluent Pond Groundwater Monitoring Data, Well FEP-3 

5-2 Final Effluent Pond Groundwater Monitoring Data, Well FEP-2 

5-3 Final Effluent Pond Groundwater Monitoring Data, Well FEP-1 

5-4 Final Effluent Pond Groundwater Monitoring Data, Well MWA-17 

5-5 Final Effluent Pond Groundwater Monitoring Data, February 2001 

 Sampling Event 

5-6 Final Effluent Pond Groundwater Monitoring Data, May 2001 Sampling 

 Event 

5-7 Final Effluent Pond Groundwater Monitoring Data, August 2001 

Sampling Event 

5-8 Final Effluent Pond Groundwater Monitoring Data, November 2001 

 Sampling Event 

5-9 Final Effluent Pond Groundwater Monitoring Data, February 2002 

 Sampling Event 

5-10 Landfill 1 Groundwater Monitoring Data, February 2001 Sampling Event 

5-11 Landfill 1 Groundwater Monitoring Data, May 2001 Sampling Event 

5-12 Landfill 1 Groundwater Monitoring Data, August 2001 Sampling Event 

5-13 Landfill 1 Groundwater Monitoring Data, November 2001 Sampling Event 

5-14 Landfill 1 Groundwater Monitoring Data, February 2002 Sampling Event 
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List of Figures 

Figure Title Follows Text 

3-1 Schematic of Water Flow 

5-1 Groundwater Monitoring Wells, Final Effluent Ponds 

5-2 Fluoride Concentration in FEP-2 Effluent (Outfall 701) 

5-3 Groundwater Monitoring Wells, Landfill 1 
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List of Acronyms 

BWXT BWX Technologies, Inc. 

CMTD Composite Model for Leaching Migration with Transformation Products 

COI constituents of interest 

DCE dichloroethene 

DEQ Virginia Department of Environmental Quality 

EPA U.S. Environmental Protection Agency Region 3 

FEP Final Effluent Pond 

HBL health-based levels 

HSWA Hazardous and Solid Waste Amendments of 1984 

LLR low-level radioactive 

MCL maximum contaminant level 

μg/L micrograms per liter 

NRC Nuclear Regulatory Commission 

PA Pickle Acid 

PCE tetrachlorethene 

RCRA Resource Conservation and Recovery Act 

RBC risk-based concentration 

TCE trichloroethene 

TSS total suspended solids 

VC vinyl chloride 

VDWM Virginia Department of Waste Management 

VHWMR Virginia Hazardous Waste Management Regulations 

VOC volatile organic compound 

VPDES Virginia Pollutant Discharge Elimination System 
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1.0 Purpose

The BWX Technologies, Inc. (BWXT) Mt. Athos Site near Lynchburg, Virginia is pursuing the 

waste exclusion (delisting) of F006 suspended solids that accumulate in the Final Effluent Ponds 

(FEP) at the Mt. Athos Site. This petition follows the successful delisting of the F006 filter cake. 

This report summarizes the groundwater monitoring data that the U.S. Environmental Protection 

Agency (EPA) Region 3 has requested in support of the delisting effort; presents an analysis of 

the data; discusses the significance of the data from a risk assessment perspective; and makes 

recommendations to support the delisting petition. 

2.0 Objectives of the FEP Sludge Delisting Petition

In pursuing a waste exclusion for all past and future generation of F006 suspended solids that 

accumulate in the FEPs, BWXT intends to accomplish the following two objectives: 

• Delist the listed F006 solids that have accumulated in the FEPs, thereby releasing 

all past and future generation of FEP sludge from management as an F006 listed 

hazardous waste under the Resource Conservation and Recovery Act (RCRA). 

• Clarify the regulatory status of the FEPs as non-hazardous surface impoundments, 

thereby resolving all the outstanding RCRA regulatory issues concerning the 

storage of the listed F006 solids in the FEPs. 

The following two sections briefly discuss each of these two objectives in more detail. 

2.1 Delist FEP Sludge

BWXT intends to apply for a waste exclusion for all past and future generation of F006 solids 

that accumulate in the FEP sludge. The F006 suspended solids are one of several waste streams 

that have contributed solids, in the form of total suspended solids (TSS), to the FEPs. Therefore, 

to address both the past and future generation of F006 solids, the sludge characterization 

program must include the following two components: 

 

• BWXT will sample and analyze the FEP sludge to characterize the past 

generatedF006 and non-hazardous solids discharged to the ponds. 

• BWXT will use the filter cake data supplied in support of the F006 filter cake 

delisting to characterize the current and future generated F006 suspended solids 

that carry over to the FEPs. The F006 suspended solids carry over to the FEPs 
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will be sampled and analyzed to confirm that the filter cake data is appropriate for 

this purpose. 

The details of the waste characterization program will be presented in a revised sampling and 

analysis plan. 

2.2 Clarify Regulatory Status of the FEPs 

The FEPs are an integral part of BWXT’s industrial wastewater treatment system, approved and 

permitted by the Virginia Department of Environmental Quality (DEQ). BWXT would like to 

continue using the ponds in this capacity. The regulatory status of the ponds and the ability of 

BWXT to continue using the ponds in their present capacity were called into question by a 

November 7, 1990 inspection conducted by the Virginia Department of Waste Management 

(VDWM) (1). The 1990 inspection determined that some of the wastewater treatment solids 

discharged to the FEPs (as TSS) should be classified as an F006 listed waste. 

BWXT believes that a successful delisting of the past-generated FEP sludge and the currentlygenerated F006 suspended solids should result in a determination by the DEQ that: 

• The FEPs are not hazardous waste surface impoundments 

• The waste exclusion should resolve any potential RCRA regulatory issues 

associated with the past and future management of the sludge in the FEPs. 

3.0 Background

The FEPs are two surface impoundments located near the James River at the northeastern (plant 

grid north) side of the Mt. Athos Site. FEP- 2 is closest to the James River and FEP-1 is located 

hydraulically upgradient of FEP-2 to the southwest (plant grid south). The FEPs, as part of the 

DEQ-approved industrial wastewater treatment system, are surface impoundments that provide 

equalization of the liquid effluent for control of pH and suspended solids. In this capacity, the 

ponds are a critical unit operation in the wastewater treatment process that maintains compliance 

with BWXT’s existing Virginia Pollutant Discharge Elimination System (VPDES) permit. 

The facilities at the BWXT Mt. Athos Site generate wastewaters that are treated in five distinct 

wastewater treatment systems. These waste streams are categorized as either radioactive or nonradioactive. A schematic of the current water flow at the site is presented in Figure 3-1. Treated 

wastewater from non-industrial processes is discharged to FEP-1, while treated wastewater from 

industrial processing operations is discharged to FEP-2. A detailed description of the process 
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operations that generate wastewater and the wastewater treatment systems at the Mt. Athos Site 

is presented in the Process Description section of the Draft Final Effluent Ponds 1 and 2 

Delisting Petition (2). 

The contributing waste treatment systems and other significant discharges into each FEP are 

identified below: 

• FEP-1: Non-Industrial Processing Operations Wastewater Discharges (NonRadioactive) 

− Water production (deionized and make-up non-contact cooling water) waste 

treatment system 

− Once-through non-contact cooling water (no treatment system required) 

• FEP-2: Industrial Processing Operations Wastewater Discharges 

− Pickle acid (PA) waste treatment system (non-radioactive) 

− Low-level radioactive (LLR) treatment system (radioactive) 

− Grit blast waste treatment system. 

In addition to the four waste treatment systems listed above, there is a sanitary waste treatment 

system that treats domestic waste from the Mt. Athos Site. Treated water from this system 

bypasses the FEPs, and is combined with the effluent from FEP-1 (Outfall 601) and FEP-2 

(Outfall 701) in a mixing chamber before the combined effluent is discharged to the James River 

(Outfall 001) through a diffuser system. 

The treated wastewater streams at the site have discharged to different FEPs at different points in 

time. Table 3-1 presents an operating history of the FEPs. 

FEP-1 was put into service in 1973, with a nominal capacity of 2,000,000 gallons. The pond 

received treated wastewater from all waste treatment systems from 1973 through 1979. In 1979, 

FEP-2, at a nominal capacity of 1,900,000 gallons, was placed into service. Both ponds were 

constructed using a clay/soil liner. When FEP-2 was initially placed in service, treated 

wastewater from all waste treatment systems was routed to FEP-2 while a portion of the 

accumulated sludge was removed from FEP-1. After 1980, the treated wastewater stream 

discharges were divided between the two FEPs. 

From 1979 to 1992, FEP-1 received treated water from the PA wastewater treatment system, the 

sanitary wastewater treatment system, and the water production wastewater treatment system. 
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FEP-2 received treated water from the LLR wastewater treatment system only. In 1992, the 

treated water from the PA system was diverted to FEP-2. In 1992, the sanitary treatment process 

was improved and the treated effluent from this system no longer discharged to FEP-1. 

The sludge in the FEPs is the carryover of suspended solids from the treatment of the industrial 

wastewaters generated at the Mt. Athos Site. The suspended solids originate from the 

clarification, filtration, and dewatering processes in the PA, LLR, water production, and grit 

blasting wastewater treatment systems. The PA and LLR treatment systems both use lime to 

precipitate dissolved fluoride as calcium fluoride. Liquid caustic is added after lime addition to 

increase the pH further to precipitate metals as metal hydroxides. The wastewater in both 

systems is then filtered in a microfiltration system to remove suspended solids. When the 

microfiltration units are taken off-line for maintenance, the water bypasses the units and 

suspended solids are removed in either the grit blasting clarifier (PA system) or the LLR system 

clarifier. The wastewater treatment sludges generated from these filtration and clarification 

processes are dewatered into a filter cake acceptable for land disposal. The filtered water from 

the PA and LLR microfiltration units, clarifiers, and filter presses all discharge to FEP-2. The 

chemical compositions of the suspended solids that carry over into the FEPs from the PA and 

LLR wastewater processes are virtually identical to the solids in their respective filter cakes. The 

suspended solids that enter the FEPs are the result of the small inefficiencies in the filtration and 

clarification processes that generate the filter cakes. The FEPs have received suspended solids 

from both the PA and LLR wastewater treatment systems. 

In June 1990, BWXT determined that the PA filter cake contained trace levels of special nuclear 

materials (i.e., enriched uranium at levels less than 30 picoCuries per gram). BWXT reported 

this finding to the Nuclear Regulatory Commission (NRC) and initiated an investigation to 

eliminate the source of the radiological contamination. In October 1991, BWXT eliminated the 

radiological contamination source to the PA filter cake solids. Prior to June 1990, the PA filter 

cake was managed as a non-hazardous solid waste. The management of the PA filter cake 

included its disposal in unlined on-site landfills permitted to receive industrial waste. These 

landfills are designated as Landfill 1 and 2. 

Immediately upon determining that the PA filter cake was radiologically contaminated, BWXT 

informed EPA Region 3 of the finding and suspended the development of a closure plan for the 

emergency surface impoundment. BWXT’s action resulted in an investigation by the EPA and 

DEQ. In November 1990, the VDWM classified the PA filter cake as an F006 waste. 
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The F006 waste classification is defined as wastewater treatment sludge from electroplating 

operations. The PA system treats wastewater from metal finishing operations, which consist of 

cleaning, hydrofluoric and nitric acid pickling, and anodizing operations. The F006 waste is 

listed for the following hazardous constituents: cadmium, hexavalent chromium, nickel, and 

complex cyanide (Title 40 Code of Federal Regulations, Part 261, Appendix VIII). BWXT 

asserted that the F006 listing should not apply to a zirconium alloy based processing operation, 

but was ultimately unsuccessful in convincing the VDWM or EPA Region 3. Past chemical 

analysis of the filter cake demonstrates that it does not exhibit the traditional F006 listing 

characteristics (3). 

The F006 classification of the PA filter cake is based solely on a process definition. The listing 

meant that the sludge in the FEPs (as well as the filter cake in the landfills) was also a F006 

waste because suspended solids from the process had been discharged at various times to both 

ponds. The F006 listing and the presence of uranium in the waste rendered the FEP sludge a 

mixed waste. As a mixed waste, both the EPA and the NRC regulated the materials. In the 

event that BWXT is successful in delisting the sludge under RCRA, the sludge will continue to 

be managed as a LLR waste under stringent NRC regulations. BWXT is obligated under its 

NRC license to decommission the site at the end of its operating life. The FEP will be 

decommissioned in accordance with NRC release criteria. 

On September 30, 1994, BWXT petitioned EPA to exclude from the lists of hazardous waste 

identified at 40 CFR 261.31, both past and currently generated filter cake solids produced by its 

wastewater treatment facility from the treatment of wastewaters in the PA system. BWXT 

believed that the petitioned waste did not meet any of the criteria under which the waste was 

listed, and that there were no additional constituents or factors that would cause the waste to be 

hazardous. 

In an August 4, 1999 proposed rule (Title 64 Federal Rule [FR] 42317), EPA proposed to delist 

the currently generated filter cake, but declined to consider the exclusion of the past generated 

filter cake for administrative reasons. As previously discussed, the past generated filter cake 

solids (prior to October 1991) are classified as a mixed waste. At the time of the proposed rule, 

the Commonwealth of Virginia had been granted the authorization to administer the RCRA base 

program by EPA, but was not specifically authorized for mixed waste. In a state that was 

authorized for the RCRA base program, but not specifically authorized for mixed waste, the 

waste was not subject to the Federal hazardous waste requirements until the state receives 

authorization specifically for mixed waste. 
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On January 14, 2000, EPA issued a final rule (65 FR 2337) excluding the currently generated 

filter cake from hazardous waste control. The Commonwealth of Virginia adopted the delisting 

on May 1, 2000. The PA filter cake is now disposed of off-site as a non-hazardous waste in an 

industrial waste landfill. 

The DEQ received authorization from EPA on July 31, 2000 to regulate the management of 

mixed waste within Commonwealth of Virginia. This final authorization became effective on 

September 29, 2000. 

4.0 Use of Groundwater Monitoring Data in Delisting 

 Petitions

In an October 12, 1989 proposed rule, EPA indicated that it would consider groundwatermonitoring data in the evaluation of delisting petitions. The proposed rule stated that the 

petitioner must submit groundwater information necessary to characterize the petitioned waste’s 

impact on groundwater quality, including the analyses of groundwater for any constituent 

deemed necessary by EPA. The Hazardous and Solid Waste Amendments Act (HSWA) of 1984 

require EPA to consider any factors (including additional constituents) other than those for 

which the waste was listed, if there is a reasonable basis to believe that such additional factors 

could cause the waste to be hazardous. Although the October 1989 proposed rule was later 

withdrawn, it still referenced in EPA guidance on delisting petitions. 

EPA uses the groundwater data to complement the use of groundwater and contaminant transport 

models to predict the mobility of toxicants from land-disposed wastes. Groundwater monitoring 

data that show no unacceptable toxicant levels may support EPA’s decision to grant a waste 

exclusion. Conversely, groundwater monitoring data that show evidence of contamination may 

support EPA’s decision to deny a petition. In evaluating a delisting petition, EPA will consider 

to be unacceptable groundwater contamination that exceeds health-based levels (HBL) in wells 

that monitor the units containing the petitioned waste. The HBLs are compiled from maximum 

contaminant levels (MCL) and EPA Region 3 risk-based concentrations (RBC) for carcinogens 

and noncarcinogens. Groundwater contamination above HBLs may provide grounds to deny a 

petition unless the petitioner can demonstrate one of the following: 

• The petitioned waste has not contributed to the contamination (e.g., contamination 

is the result of other on-site sources) 

• The exceedance is due to an error in sampling or analysis or other factors not 

associated with the petitioned waste 
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• The exceedance, although greater than the health-based levels, is not statistically 

significant. 

The following section discusses the relevant groundwater data that demonstrates that the FEP 

sludge has not contributed to groundwater contamination at the site, and that the groundwater 

contamination that exists downgradient of the FEPs is caused by another on-site source. 

5.0 Relevant Groundwater Monitoring Data

Groundwater has been sampled over 5 quarters (starting in February 2001) at Landfill 1 and the 

FEP to support the delisting of past-generated PA filter cake and carry-over suspended solids at 

the Mt. Athos Site. Although PA filter cake was also disposed on-site at Landfill 2, recent 

groundwater data has not been collected at this unit because the delisting of this waste material in 

this unit is not being pursued. 

BWXT discontinued the disposal of PA filter cake in Landfill 1 in 1976. Landfill 1 is closed and 

is not an issue under the hazardous waste regulations. However, the NRC has requested that a 

portion of the waste material that contains higher levels of radioactivity in Landfill 1 be removed 

as a part of the Agency’s timeliness and decommissioning policy. Landfill 2, which ceased 

operations in 1990, is subject to hazardous waste regulations. The NRC has released Landfill 2 

and requested that it be capped to meet decommissioning closure criteria. BWXT is proceeding 

with the RCRA closure of Landfill 2. 

As discussed in Section 2.0, the FEP sludge is made up in part of the TSS carryover of the filter 

cake solids that have also been placed in Landfills 1 and 2. Additionally, the FEP sludge is 

composed of non-hazardous suspended solids carry-over from the LLR, water production, and 

grit blasting wastewater treatment systems. The LLR wastewater treatment process is almost 

identical to that used in the PA system, in that the equipment configurations are substantially 

similar. The LLR system treats spent acid solutions from radiological operating areas of the 

facility. 

The FEP sludge contains solids generated from the PA wastewater treatment process over a 

longer period of time than either landfill, although the period of accumulation in the ponds 

encompasses the time period over which the PA filter cake was disposed of in both landfills. As 

such, the current groundwater monitoring data for both the FEPs and Landfill 1 are pertinent to 

the delisting evaluation (as previously discussed, there is no recent groundwater data available 
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for Landfill 2). For the reasons stated below, the groundwater data from Landfill 1 is more 

representative of the actual mobility of some the constituents (principally fluoride) in the PA 

suspended solids. 

The use of FEP groundwater data to evaluate contaminant mobility in the FEP sludge and its 

impact on downgradient groundwater is complicated by the effects of the wastewater effluent in 

the FEP. As previously discussed, the FEPs are used as equalization ponds for treated industrial 

effluent and are part of BWXT’s permitted wastewater treatment system that discharges to the 

James River. The fluoride in the sludge is present as calcium fluoride an insoluble precipitate, 

while the fluoride in the effluent is in a dissolved form that can migrate through the soil and 

affect the underlying groundwater. As a result, BWXT believes that the FEP groundwater 

monitoring data is not relevant to the evaluation of some of the constituents (those also present in 

the effluent) in the FEP sludge for delisting. 

The groundwater monitoring data at Landfill 1 is more representative of the impact of certain 

constituents in the PA sludge (e.g., fluoride) on groundwater because it is not co-located with the 

dissolved form of these constituents in wastewater. The remainder of this section presents the 

groundwater monitoring data for the FEP and Landfill 1. Throughout this discussion, a 

distinction will be made between groundwater exceedances attributable to the FEP and those 

attributable to the FEP sludge. 

5.1 FEP Groundwater Data 

Tables 5-1 through 5-4 present the available quarterly groundwater monitoring data for FEP 

monitoring wells FEP-3, FEP-2, FEP-1, and MWA-17, respectively. As shown on Figure 5-1, 

FEP-3 is a background well, located upgradient of the ponds. Wells FEP-1 and FEP-2 are 

located immediately downgradient of the ponds, while well MWA-17 is located further 

downgradient between the ponds and the James River. On each table, the groundwater results 

are compared to MCLs and EPA Region 3 RBCs for tap water. Chemical detections that exceed 

either the MCL or the RBC are shaded on the tables. It has been EPA’s past practice when 

assigning “delisting levels” to select the MCL when one is available. 

Tables 5-1 through 5-4 show the temporal variability of the groundwater data within each FEP 

monitoring well. An examination of these tables shows that several chemicals are detected 

above either the MCL or the RBC in one or more wells. Most of the constituents of interest on 

the tables with elevated concentrations are metals. The other constituents of interest are the 

chlorinated solvents tetrachloroethene (PCE) and trichloroethene (TCE). 
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In order to properly evaluate the data for delisting purposes, it is necessary to compare 

upgradient and downgradient concentrations from each sampling event to determine if the FEPs 

are the source of the elevated concentrations with respect to HBLs. An upgradient (background) 

concentration of a particular chemical at or above the level detected in downgradient wells is 

direct evidence that the FEPs are not contributing to downgradient groundwater contamination. 

A comparison of data in this form (Tables 5-5 through 5-9) shows that the FEP are not 

contributing to most of the elevated concentrations of chemicals detected in downgradient wells. 

Of the several inorganic constituents that are elevated above HBLs in downgradient 

groundwater, only fluoride cannot be attributed to a source upgradient of the FEP. 

The concentrations of chlorinated solvents detected downgradient of the FEPs are directly 

attributable to the Area A groundwater plume at the Mt. Athos Site. Previous studies have 

documented the extent of this solvent plume (4). During the recent quarterly monitoring events, 

TCE was consistently detected in up-gradient monitoring well FEP-3. In addition, there is no 

process information, effluent data, sludge data, or filter cake analytical data that would implicate 

the FEPs as the source of these solvents. BWXT has a limitation-monitoring waiver on its 

current VPDES permit for total toxic organics (including chlorinated volatile organic compounds 

[VOC]) because these constituents were not detected in past effluent sampling. Based on an 

evaluation of the available data, it is clear that these chemicals are unrelated to the FEPs or the 

FEP sludge. 

The facility wastewaters are the source of the fluoride in downgradient groundwater. There is 

evidence that the FEP sludge is not the source of this contamination. The concentrations of 

dissolved fluoride in the treated industrial effluent flowing through the FEPs are well within 

levels that could generate the groundwater concentrations detected downgradient of the FEPs. 

The fluoride concentration in downgradient groundwater in 2001 ranged from 11,000 to 18,100 

micrograms per liter (μg/L), with an average concentration of 13,500 μg/L. Dissolved fluoride 

concentrations in the treated effluent (Figure 5-2) over the time period 1996 to 2002 range from 

2600 μg/L to 85,000 μg/L, with an average concentration over this period of 13,000 μg/L. 

Although the industrial wastewater is treated to reduce the concentration of fluoride, significant 

levels of fluoride are still present in the FEP-2 outfall before the water is combined with other 

treated water streams and discharged to the James River. This data demonstrates that the treated 

industrial effluent that discharges through FEP-2 is the source of the downgradient groundwater 

contamination. Because the fluoride concentrations in groundwater can be attributed to a source 

other than the FEP sludge, BWXT believes that the fluoride groundwater data is not an 

appropriate parameter for assessing the potential impact of the FEP sludge on groundwater. 
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Additional evidence demonstrating the link between chemicals detected in the FEP effluent and 

groundwater downgradient of the FEPs can be found in groundwater monitoring data collected 

by BWXT in 1994. In June 1994, BWXT determined that the FEPs were impacting the 

concentrations of nitrate, nitrite, fluoride, sodium, and foaming agents in downgradient 

groundwater. Although composition data for these constituents in PA filter cake or FEP sludge 

are not available (with the exception of fluoride in filter cake), it is known that the common salts 

of sodium, nitrate, and nitrite are highly water-soluble. Therefore, these constituents would not 

be expected to be present to any significant degree in the suspended solids carry-over into the 

FEP. Based on the solubility of these ions, it is likely that the concentrations of these 

constituents in groundwater downgradient of the FEPs result from the dissolved levels of these 

ions in the FEP effluent. More specifically, the concentrations of dissolved fluoride in the FEP 

effluent have impacted downgradient groundwater. 

5.2 Landfill 1 Groundwater Data 

As previously discussed, PA filter cake was disposed of on-site at Landfill 1. Therefore, current 

groundwater monitoring data from the landfill is relevant to the FEP sludge delisting evaluation. 

As shown on Figure 5-3, four monitoring wells encircle Landfill 1. Well LF-4 is upgradient of 

the landfill trenches, wells FL-1 and FL-3 are crossgradient, and well FL-2 is directly 

downgradient of the landfill. Tables 5-10 through 5-14 present groundwater monitoring data 

from five quarterly sampling events at Landfill 1, beginning in February 2001. 

The tables show that several metals and chlorinated solvents were detected in one or more wells 

at concentrations greater than HBLs. However, of the six metals detected above HBLs during at 

least one sampling event (arsenic, beryllium, cadmium, chromium, lead, and thallium), none of 

the metals were consistently detected in downgradient groundwater at concentrations that were 

above the upgradient groundwater concentrations. Therefore, the PA filter cake in the landfill 

trenches is not contributing to downgradient groundwater contamination of inorganic chemicals 

above HBLs. In particular, the concentrations of fluoride in all Landfill 1 groundwater samples 

are well below HBLs. Given the chemical similarity of the PA filter cake and the FEP sludge, 

this is further evidence supporting BWXT’s conclusion that the FEP sludge is not the source of 

the fluoride contamination in groundwater downgradient of the FEPs. 

Four chlorinated solvents, PCE, TCE, cis-1,2-dichloroethene (DCE), and vinyl chloride (VC), 

were detected above HBLs in groundwater monitoring data. Although solvent concentrations in 

downgradient wells were higher than those in the upgradient well, extensive sampling of soil, 

waste (PA filter cake), and groundwater at Landfill 1 has not demonstrated that the solvent 

contamination at the site is attributable to the PA filter cake placed in the trenches. Significant 
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concentrations of VOCs have not been detected in the filter cake samples collected from the 

landfill trenches (5). The very low concentrations of VOCs that were detected in some filter 

cake samples appear to be due to contaminated groundwater from a source outside the trenches 

contacting the filter cake due to seasonal fluctuations in groundwater levels. Additionally, VOCs 

have not been detected in the current generation of PA filter cake for off-site disposal. 

A review of all the groundwater data collected at Landfill 1, including the samples from 

temporary wells constructed around the landfill trenches, clearly shows that the VOC “hot spot” 

in groundwater is located southeast of the landfill trenches (plant grid east) near monitoring well 

FL-3. VOC concentrations drop off significantly in all directions away from this location (6). 

The totality of the analytical data collected for all media at Landfill 1 strongly indicates that the 

solvent contamination detected in groundwater at the landfill originates from a source other than 

the landfill trenches. Because the VOC concentrations in groundwater can be attributed to a 

source other than the PA filter cake placed in the landfill, the VOC groundwater data is not an 

appropriate parameter for assessing the potential impact of the PA filter cake (or FEP sludge) on 

groundwater. 

6.0 FEP Risk Assessment

The FEPs are part of BWXT’s DES-permitted wastewater treatment system. Under the previous 

VPDES permit, BWXT was required to monitor and address any exceedances of groundwater 

standards associated with the FEPs. BWXT installed and monitored wells adjacent to the FEPs 

and identified and investigated the impact of groundwater exceedances. 

BWXT issued several reports to the Water Division of DEQ (7, 8) related to the groundwater 

exceedances associated with the FEPs. The results of the risk assessment screening indicated 

that groundwater impacted by the FEPs does not pose a significant risk to human health and the 

environment for those constituents of interest (COI) examined. This conclusion was based on 

comparisons of the groundwater data to conservative effects benchmarks (federal aquatic water 

quality criteria) and upstream reference background data. 

The environmental risk assessment included an evaluation of toxicity, point of exposure, and 

receptors. All three components must be present to constitute a risk. The James River is the 

only exposure point where receptors could be potentially exposed to impacted groundwater, 

resulting in a potential risk. The conservative risk assessment confirmed that the James River 

surface water was not impacted by the groundwater. The report concluded that corrective 
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measures to address the groundwater exceedances were not warranted, thus no further actions 

were recommended. The DEQ concurred with that recommendation (9). 

7.0 Conclusions

The following conclusions can be drawn from a review of the groundwater monitoring data for 

the FEPs and Landfill 1: 

• The FEP sludge is not contributing to groundwater contamination above HBLs 

downgradient of the FEPs for the following reasons: 

− A comparison of upgradient and downgradient monitoring well data shows that 

the FEPs are not contributing to groundwater contamination. 

− Fluoride in groundwater at concentrations above HBLs downgradient of the 

FEPs is attributable to dissolved fluoride present in the treated effluent (not the 

sludge) that discharges through FEP-2. Fluoride concentrations in the FEP 

effluent are within the range of concentrations detected in downgradient 

groundwater. Previously, BWXT had established a similar connection 

between dissolved concentrations of sodium, nitrate, and nitrite in FEP effluent 

and elevated concentrations of these constituents in groundwater. Therefore, 

BWXT believes that the fluoride groundwater data at the FEPs is not 

appropriate for evaluating the delisting of FEP sludge because the 

contamination is the result of dissolved constituents present in the effluent 

(another on-site source). 

− PCE and TCE in groundwater at concentrations above HBLs are attributable to 

the Area A groundwater plume at the Mt. Athos Site, which has migrated into 

the area occupied by the FEPs. Therefore, PCE and TCE (and their 

degradation products) groundwater data at the FEPs are not appropriate for 

evaluating the delisting of FEP sludge because the contamination is the result 

of another on-site source. 

Therefore, the solid materials deposited in the FEPs do not contribute to the 

groundwater exceedances; and BWXT believes that the fluoride, PCE, and TCE 

data are not relevant to the delisting evaluation based on the exemption discussed 

in Section 4.0. 

• Groundwater monitoring data for Landfill 1 shows that PA filter cake (similar in 

composition to FEP sludge) does not contribute to fluoride concentrations in 

groundwater above HBLs at the landfill. This data is corroborating evidence that 

the fluoride concentrations detected above HBLs in groundwater at the FEPs do 

not originate from the FEP sludge. 
KN6\BWXT\FEP\02 GWAR\GWAR rev 10.doc\5/23/06\4:09 PM 13 

• BWXT completed a conservative risk assessment associated with the groundwater 

exceedances that have been detected downgradient of the FEPs. The risk 

assessment confirmed the lack of complete exposure pathways, cited the dilution 

provided by the river, and the lack of human health or ecological receptors (now 

and in the future) to support the conclusion that the groundwater exceedances are 

not a significant problem and do not warrant any corrective action. 

• Any actions BWXT undertakes associated with the FEPs or the FEP sludge must 

be done in conjunction its NRC license and its VDPES discharge permit. 

Furthermore, BWXT is obligated to decommission the FEPs at the end of their 

operating life to NRC release criteria. Given the current regulatory status of the 

sludge, it would be managed as a mixed waste. In the event the FEP sludge is 

excluded from management under RCRA, the sludge would still be managed as a 

LLR waste and disposed of at a licensed LLR waste disposal facility. Disposal of 

the FEP sludge in an NRC-approved LLR waste landfill would meet or exceed the 

minimum standards for disposal of the PA filter cake that EPA established in the 

PA filter cake delisting (65 FR 2337). 

8.0 Recommendations

Based on the groundwater data presented in Section 5.0, there is no direct evidence that the FEP 

sludge is contributing to groundwater contamination above HBLs downgradient of the FEPs. 

Because the fluoride, PCE, and TCE concentrations in groundwater can be attributed to sources 

other than the FEP sludge, BWXT believes that the groundwater data for these constituents are 

not appropriate parameters to assess the potential impact of the FEP sludge on groundwater. The 

groundwater data for all other chemical constituents should support an EPA decision to grant a 

waste exclusion for the FEP sludge. 

It is recommended that the delisting process proceed, including the sampling and analysis of FEP 

sludge and PA treatment system TSS carryover for characterization of the appropriate analytical 

parameters. The characterization data can be used with the appropriate fate and transport model, 

such as the EPA Composite Model for Leaching Migration with Transformation Products, to 

calculate a cumulative cancer risk and non-cancer hazard for the FEP sludge and determine 

appropriate “delisting levels” for the future suspended solids discharging to the FEPs from the 

PA treatment process. BWXT welcomes the opportunity to work jointly with EPA Region 3 to 

devise a sampling and analytical program to support the F006 delisting process. A positive 

outcome using this risk-based delisting procedure should confirm the results of the groundwater 

evaluation presented here, and resolve any question about the potential impact of the FEP sludge 

on groundwater. 
KN6\BWXT\FEP\02 GWAR\GWAR rev 10.doc\5/23/06\4:09 PM 14 

9.0 References

(1) Virginia Department of Waste Management, Letter to Babcock and Wilcox, December 27, 

1990. 

(2) BWX Technologies, Inc. (BWXT), 2002a, Draft Final Effluent Ponds 1 and 2 Delisting 

Petition (Process Description section), March 2002. 

(3) BWX Technologies, Inc. (BWXT), 1994b, FEP Sludge Delisting Petition, ID No. 0889, 

October 1994. 

(4) BWX Technologies, Inc. (BWXT), 2002b, Draft RCRA Corrective Measure Study, 

Comprehensive Baseline Monitoring Report, Mt. Athos Site, Lynchburg, Virginia, 

February 2002. 

(5) BWX Technologies, Inc. (BWXT), 2001, Supplemental Assessment Report, LF-1 (Former 

Landfill), Mt. Athos Site, Lynchburg, Virginia, December 2001. 

(6) BWX Technologies, Inc. (BWXT), 2002c, Groundwater Assessment at Landfill 1 (LF-1: 

Former Landfill), Mt. Athos Site, Lynchburg, Virginia, March 2002. 

(7) BWX Technologies, Inc. (BWXT), Assessment of Potential Environmental Risk 

Associated with Groundwater Impacted by the Final Effluent Ponds, August 1994. 

(8) BWX Technologies, Inc. (BWXT), Corrective Action Plan for Exceedances from the Final 

Effluent Ponds, March 1998. 

(9) Virginia Department of Environmental Quality (DEQ), Letters to BWX Technologies, Inc., 

Addressing Final Effluent Ponds Risk Assessment, May 13, 1998 and August 3, 1998. 
KN6\BWXT\FEP\02 GWAR\GWAR rev 10.doc\5/23/06\4:09 PM

TABLES 
KN6\BWXT\FEP\02 GWAR\Table 3-1.doc\5/23/06\4:14 PM

Table 3-1 

Operating History of the Final Effluent Ponds 

BWX Technologies, Inc. 

Mt. Athos Site, Lynchburg, Virginia 

Pond No. Time Interval Wastewater Stream 

FEP-1 1973-1979 All (Low-Level Radioactive, Pickle Acid, Sanitary, Miscellaneo

 1980-1992 Pickle Acid, Sanitary, and Water Production  1993-Present Water Production and Once Through Non-Contact Cooling Wa

FEP-2 1979 All (Low Level Radioactive, Pickle Acid, Sanitary, Miscellaneo

 1980-1992 Low-Level Radioactive  1992-Present Low-Level Radioactive, Pickle Acid, and Grit Blast 
Table 5-1

Final Effluent Pond Groundwater Monitoring Data

Well FEP-3

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-3 FEP-3 FEP-3DUP FEP-3 FEP-3 FEP-3

Date Sampled 02/14/01 05/16/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 400 300 300 200 200 400

Sulfide N/A N/A 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 972* < 38.9* < 38.9* < 38.9* < 58.7* < 58.7*

Arsenic 50 0.045 1180 42.8 28.7 < 18.9* < 27.7* < 27.7*

Barium 2000 2600 1170 882 840 370 236 221

Beryllium 4 73 < 10.8* 5.22 5 1.67 0.889 < 0.233

Cadmium 5 18 < 55.6* < 2.22 < 2.22 < 2.22 < 3.78 < 3.78

Chromium 100 110 322 109 109 36.3 16.4 9.67

Cobalt N/A 730 < 83.3 74.8 70.6 17.7 8.33 3.56

Copper 1300 1500 150 226 215 49.3 19.6 7.22

Lead 15 N/A < 1060* 154 132 < 42.2* < 54.3* < 54.3*

Mercury 2 3.7 < 0.1 0.321 0.362 < 0.1 < 0.2 < 0.2

Nickel N/A 730 < 111 125 124 35.3 13.3 < 11.3

Selenium 50 180 633 25.2 < 24.4 < 24.4 < 28.6 < 28.6

Silver N/A 180 < 194* < 7.78 < 7.78 < 7.78 < 9 < 9

Thallium 2 2.6 < 2030* < 81.1* < 81.1* 135 < 67.7* < 67.7*

Tin N/A 22000 < 1000 < 40 < 40 < 40 < 40 < 12.2

Vanadium N/A 260 139 222 215 81.3 28 9.33

Zinc N/A 11000 422 415 416 105 71.8 37.6

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10.2 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10.2 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10.2 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10.2 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10.2 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10.2* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10.2* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10.2 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10.2 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10.2* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10.2 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10.2 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10.2 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10.2 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10.2 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10.2 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-1 (FEP-3).xls(fep3q102gwcdh)\5/23/2006(4:36 PM)
Table 5-1

Final Effluent Pond Groundwater Monitoring Data

Well FEP-3

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-3 FEP-3 FEP-3DUP FEP-3 FEP-3 FEP-3

Date Sampled 02/14/01 05/16/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10.2 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10.2 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10.2 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10.2* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10.2* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10.2 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10.2 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10.2 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10.2 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10.2 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10.2* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10.2 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10.2* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10.2 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10.2 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10.2* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10.2 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10.2 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10.2 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10.2* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10.2* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10.2* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10.2 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10.2 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10.2* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10.2 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10.2 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10.2 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10.2* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10.2 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-1 (FEP-3).xls(fep3q102gwcdh)\5/23/2006(4:36 PM)
Table 5-1

Final Effluent Pond Groundwater Monitoring Data

Well FEP-3

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-3 FEP-3 FEP-3DUP FEP-3 FEP-3 FEP-3

Date Sampled 02/14/01 05/16/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10.2 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10.2 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10.2* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10.2* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10.2 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10.2* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10.2* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10.2 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10.2* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10.2* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10.2* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10.2* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10.2* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10.2* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10.2* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10.2 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10.2* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10.2* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10.2 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10.2 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10.2 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10.2 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10.2* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10.2* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 4.2 1.5 1.3 < 10* 3.6 1.7

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10.2* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10.2* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10.2 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-1 (FEP-3).xls(fep3q102gwcdh)\5/23/2006(4:36 PM)
Table 5-1

Final Effluent Pond Groundwater Monitoring Data

Well FEP-3

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-3 FEP-3 FEP-3DUP FEP-3 FEP-3 FEP-3

Date Sampled 02/14/01 05/16/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-1 (FEP-3).xls(fep3q102gwcdh)\5/23/2006(4:36 PM)
Table 5-1

Final Effluent Pond Groundwater Monitoring Data

Well FEP-3

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-3 FEP-3 FEP-3DUP FEP-3 FEP-3 FEP-3

Date Sampled 02/14/01 05/16/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 < 10* < 10* < 10* < 10* < 10* < 10*

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 4.3 6 6.2 6.1 5 2.4

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 < 10 < 10 < 10 < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-1 (FEP-3).xls(fep3q102gwcdh)\5/23/2006(4:36 PM)
Table 5-2

Final Effluent Pond Groundwater Monitoring Data

Well FEP-2

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-2 FEP-2 FEP-2 FEP-2 FEP-2

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 8 < 5 < 5 < 5

Fluoride, Total 4000 2200 18100 11900 11000 13000 8370

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 58.7* < 58.7*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* < 27.7* < 27.7*

Barium 2000 2600 305 684 338 339 342

Beryllium 4 73 1.78 2.89 0.667 1.33 0.778

Cadmium 5 18 2.89 2.89 < 2.22 < 3.78 < 3.78

Chromium 100 110 26.6 51.6 < 8.89 25.1 16.4

Cobalt N/A 730 26 31.3 8.67 17.7 9.22

Copper 1300 1500 29.7 37.7 21.6 21.2 10.3

Lead 15 N/A < 42.2* 74.9 < 42.2* < 54.3* < 54.3*

Mercury 2 3.7 < 0.1 < 0.1 < 0.1 < 0.2 < 0.2

Nickel N/A 730 48.3 73.2 30.2 42.6 33.8

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 28.6 < 28.6

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 9 < 9

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 67.7* < 67.7*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 12.2

Vanadium N/A 260 38.2 84.7 13 31.3 19.4

Zinc N/A 11000 106 196 27 72.7 41.6

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10.3 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10.3 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10.3 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10.3 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10.3 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10.3 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10.3* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10.3* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10.3 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10.3 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10.3 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10.3 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10.3 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10.3* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10.3 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10.3 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10.3 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10.3 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10.3 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10.3 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10.3 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10.3 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-2 (FEP-2).xls(fep2q102gwcdh)\5/23/2006(4:16 PM)
Table 5-2

Final Effluent Pond Groundwater Monitoring Data

Well FEP-2

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-2 FEP-2 FEP-2 FEP-2 FEP-2

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10.3 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10.3 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10.3 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10.3 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10.3 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10.3 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10.3* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10.3* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10.3 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10.3 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10.3 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10.3 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10.3 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10.3 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10.3 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10.3 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10.3 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10.3 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10.3 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10.3 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10.3 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10.3* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10.3 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10.3* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10.3 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10.3* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10.3 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10.3* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10.3* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10.3* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10.3* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10.3* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10.3 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10.3 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10.3 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10.3* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10.3* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10.3* < 10*

Di-n-butyl phthalate N/A 3700 1.3 < 10 < 10 < 10.3 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10.3 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10.3* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10.3 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10.3 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10.3 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10.3* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10.3 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-2 (FEP-2).xls(fep2q102gwcdh)\5/23/2006(4:16 PM)
Table 5-2

Final Effluent Pond Groundwater Monitoring Data

Well FEP-2

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-2 FEP-2 FEP-2 FEP-2 FEP-2

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10.3 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10.3 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10.3 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10.3* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10.3* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10.3 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10.3* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10.3* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10.3 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10.3 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10.3 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10.3* < 10*

N-Nitrosodiethylamine N/A 0.00045 2.4 < 10* < 10* < 10.3* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10.3* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10.3* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10.3 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10.3 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10.3* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10.3* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10.3* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10.3 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10.3 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10.3* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10.3* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10.3 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10.3 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10.3 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10.3 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10.3 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10.3 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10.3 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10.3 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10.3 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10.3* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10.3* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* 2.3 < 10* 4.3 4.8

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10.3* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10.3* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10.3 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-2 (FEP-2).xls(fep2q102gwcdh)\5/23/2006(4:16 PM)
Table 5-2

Final Effluent Pond Groundwater Monitoring Data

Well FEP-2

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-2 FEP-2 FEP-2 FEP-2 FEP-2

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-2 (FEP-2).xls(fep2q102gwcdh)\5/23/2006(4:16 PM)
Table 5-2

Final Effluent Pond Groundwater Monitoring Data

Well FEP-2

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-2 FEP-2 FEP-2 FEP-2 FEP-2

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 21 22.2 15 13.1 9.6

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 156 116 103 254 30.1

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 8.5 4.3 7 1.1

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-2 (FEP-2).xls(fep2q102gwcdh)\5/23/2006(4:16 PM)
Table 5-3

Final Effluent Pond Groundwater Monitoring Data

Well FEP-1

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 4)

Sample Number FEP-1 FEP-1 FEP-1 FEP-1DUP FEP-1DUP FEP-1 FEP-1 FEP-1

Date Sampled 02/14/01 05/16/01 08/22/01 08/22/01 11/12/01 11/12/01 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 12 < 5 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 3200 2700 3200 3200 4000 3800 2410 2320

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 58.7* < 58.7* < 58.7* < 58.7*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* < 18.9* < 27.7* < 27.7* < 27.7* < 27.7*

Barium 2000 2600 1580 296 293 231 181 224 150 143

Beryllium 4 73 0.778 1.67 1.11 0.667 0.889 1.33 0.333 0.333

Cadmium 5 18 < 2.22 2.22 < 2.22 < 2.22 < 3.78 < 3.78 < 3.78 < 3.78

Chromium 100 110 17.7 46.3 31.2 20.2 25.9 34.1 12.9 13.9

Cobalt N/A 730 88.8 221 106 60 81.8 86.3 36.2 35.9

Copper 1300 1500 23.6 43.8 29.2 37 23.4 35.7 13.1 15.8

Lead 15 N/A < 42.2* 64.2 < 42.2* < 42.2* < 54.3* < 54.3* < 54.3* < 54.3*

Mercury 2 3.7 < 0.1 0.109 < 0.1 < 0.1 1.12 < 0.2 < 0.2 < 0.2

Nickel N/A 730 60.7 96.4 72.4 70.6 70.1 75.6 42.6 43.6

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 24.4 < 28.6 < 28.6 < 28.6 < 28.6

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 9 < 9 < 9 < 9

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 81.1* < 67.7* < 67.7* < 67.7* < 67.7*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40 < 40 < 12.2 < 12.2

Vanadium N/A 260 22.2 55 50.6 29 29.8 40.8 13.9 10.4

Zinc N/A 11000 78.3 158 87.1 62.1 98.2 111 37.2 35.4

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Groundwater

KN6\BWXT\FEP\02 GWAR\Table 5-3 (FEP-1).xls(fep1q102gwcdh)\5/23/2006(4:16 PM)
Table 5-3

Final Effluent Pond Groundwater Monitoring Data

Well FEP-1

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 4)

Sample Number FEP-1 FEP-1 FEP-1 FEP-1DUP FEP-1DUP FEP-1 FEP-1 FEP-1

Date Sampled 02/14/01 05/16/01 08/22/01 08/22/01 11/12/01 11/12/01 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Groundwater

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 1.3 3.2 < 10 < 10 < 10.1 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A 2.6 1.5 < 10 < 10 < 10.1 < 10 1.1 1.2

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-3 (FEP-1).xls(fep1q102gwcdh)\5/23/2006(4:16 PM)
Table 5-3

Final Effluent Pond Groundwater Monitoring Data

Well FEP-1

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 4)

Sample Number FEP-1 FEP-1 FEP-1 FEP-1DUP FEP-1DUP FEP-1 FEP-1 FEP-1

Date Sampled 02/14/01 05/16/01 08/22/01 08/22/01 11/12/01 11/12/01 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Groundwater

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* 4.7 4.4 < 10* 2 1.9 < 10* 1.4

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10.1* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10.1 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10 < 10 1.6 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-3 (FEP-1).xls(fep1q102gwcdh)\5/23/2006(4:16 PM)
Table 5-3

Final Effluent Pond Groundwater Monitoring Data

Well FEP-1

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 4)

Sample Number FEP-1 FEP-1 FEP-1 FEP-1DUP FEP-1DUP FEP-1 FEP-1 FEP-1

Date Sampled 02/14/01 05/16/01 08/22/01 08/22/01 11/12/01 11/12/01 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Groundwater

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100* < 100* < 100* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.6 1.2 1.4 1.4 1.9 2 1.4 1.4

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 9.4 8.4 8.6 8.5 38.4 38.1 8.3 8.2

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 3.2 2.6 2.6 3.2 3.2 2.2 2.2

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-3 (FEP-1).xls(fep1q102gwcdh)\5/23/2006(4:16 PM)
Table 5-4

Final Effluent Groundwater Monitoring Data

Well MWA-17

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number MWA-17 MWA-17 MWA-17 MWA-17 MWA-17

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 6 < 5 < 5 < 5

Fluoride, Total 4000 2200 2200 2400 1900 2600 1910

Sulfide N/A N/A 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 58.7* < 58.7*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* < 27.7* < 27.7*

Barium 2000 2600 381 1860 461 515 154

Beryllium 4 73 < 0.433 1.78 < 0.444 0.667 < 0.233

Cadmium 5 18 < 2.22 4.22 < 2.22 < 3.78 < 3.78

Chromium 100 110 < 8.89 51.7 < 8.89 13.1 < 8.89

Cobalt N/A 730 4.44 56.9 6.89 19 < 3.33

Copper 1300 1500 6.44 157 30.6 24.6 9

Lead 15 N/A < 42.2* 118 < 42.2* < 54.3* < 54.3*

Mercury 2 3.7 < 0.1 < 0.1 < 0.1 < 0.2

Nickel N/A 730 8.67 96.8 12.3 36 < 11.3

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 28.6 < 28.6

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 9 < 9

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 67.7* < 67.7*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 12.2

Vanadium N/A 260 < 2.22 64 4.89 15.8 < 4.78

Zinc N/A 11000 22.7 327 38.9 129 17.9

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-4 (MWA-17).xls(mwa17q102gwcdh)\5/23/2006(4:17 PM)
Table 5-4

Final Effluent Groundwater Monitoring Data

Well MWA-17

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number MWA-17 MWA-17 MWA-17 MWA-17 MWA-17

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-4 (MWA-17).xls(mwa17q102gwcdh)\5/23/2006(4:17 PM)
Table 5-4

Final Effluent Groundwater Monitoring Data

Well MWA-17

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number MWA-17 MWA-17 MWA-17 MWA-17 MWA-17

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* 1.4 3 4.5 1.6

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-4 (MWA-17).xls(mwa17q102gwcdh)\5/23/2006(4:17 PM)
Table 5-4

Final Effluent Groundwater Monitoring Data

Well MWA-17

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number MWA-17 MWA-17 MWA-17 MWA-17 MWA-17

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-4 (MWA-17).xls(mwa17q102gwcdh)\5/23/2006(4:17 PM)
Table 5-4

Final Effluent Groundwater Monitoring Data

Well MWA-17

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number MWA-17 MWA-17 MWA-17 MWA-17 MWA-17

Date Sampled 02/14/01 05/16/01 08/22/01 11/12/01 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 29.9 19.5 1.4 46.5 1.3

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 174 135 11.9 214 10.2

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 17 < 10 24.4 1.2

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-4 (MWA-17).xls(mwa17q102gwcdh)\5/23/2006(4:17 PM)
Table 5-5

Final Effluent Pond Groundwater Monitoring Data

Feburary 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/01 02/14/01 02/14/01 02/14/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 3200 18100 400 2200

Sulfide N/A N/A < 1000 < 1000 1000 1000

Antimony 6 15 < 38.9* < 38.9* < 972* < 38.9*

Arsenic 50 0.045 < 18.9* < 18.9* 1180 < 18.9*

Barium 2000 2600 1580 305 1170 381

Beryllium 4 73 0.778 1.78 < 10.8* < 0.433

Cadmium 5 18 < 2.22* 2.89 < 55.6* < 2.22*

Chromium 100 110 17.7 26.6 322 < 8.89

Cobalt N/A 730 88.8 26 < 83.3 4.44

Copper 1300 1500 23.6 29.7 150 6.44

Lead 15 NA < 42.2* < 42.2* < 1060* < 42.2*

Mercury 2 3.7 < 0.1 < 0.1 < 0.1 < 0.1

Nickel N/A 730 60.7 48.3 < 111 8.67

Selenium 50 180 < 24.4 < 24.4 633 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 194* < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 2030* < 81.1*

Tin N/A 22000 < 40 < 40 < 1000 < 40

Vanadium N/A 260 22.2 38.2 139 < 2.22

Zinc N/A 11000 78.3 106 422 22.7

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 2* < 2* < 2*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A N/A < 10 < 10 < 10 < 10

2-Chlorophenol N/A 490 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-5 (Feb 2001).xls(q1gwcdh)\5/23/2006(4:19 PM)
Table 5-5

Final Effluent Pond Groundwater Monitoring Data

Feburary 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/01 02/14/01 02/14/01 02/14/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Methylnaphthalene N/A 30 < 10 < 10 < 10 < 10

2-Methylphenol N/A 120 < 10 < 10 < 10 < 10

2-Nitroaniline N/A 1800 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A N/A < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.15 < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A 0.0073 < 10 < 10 < 10 < 10

3-Methylphenol N/A N/A < 10 < 10 < 10 < 10

3-Nitroaniline N/A 1800 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A N/A < 10* < 10* < 10* < 10*

4-Bromophenyl phenyl ether N/A 37 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10

4-Chloroaniline N/A N/A < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A 150 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10

4-Methylphenol N/A N/A < 10 < 10 < 10 < 10

4-Nitroaniline N/A 180 < 10 < 10 < 10 < 10

4-Nitrophenol N/A N/A < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A 290 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A N/A < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A 2 < 10 < 10 < 10 < 10

Acenaphthene N/A N/A < 10 < 10 < 10 < 10

Acenaphthylene N/A 370 < 10 < 10 < 10 < 10

Acetamide, N-9H-Fluoren-2-yl N/A NA < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 1.3 1.3 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-5 (Feb 2001).xls(q1gwcdh)\5/23/2006(4:19 PM)
Table 5-5

Final Effluent Pond Groundwater Monitoring Data

Feburary 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/01 02/14/01 02/14/01 02/14/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* 2.4 < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A 2.6 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* < 10* 4.2 < 10*

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-5 (Feb 2001).xls(q1gwcdh)\5/23/2006(4:19 PM)
Table 5-5

Final Effluent Pond Groundwater Monitoring Data

Feburary 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/01 02/14/01 02/14/01 02/14/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-5 (Feb 2001).xls(q1gwcdh)\5/23/2006(4:19 PM)
Table 5-5

Final Effluent Pond Groundwater Monitoring Data

Feburary 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/01 02/14/01 02/14/01 02/14/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.6 21 < 10* 29.9

Toluene 1000 750 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 9.4 156 4.3 174

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene N/A 61 3.2 8.5 < 10 17

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-5 (Feb 2001).xls(q1gwcdh)\5/23/2006(4:19 PM)
Table 5-6

Final Effluent Pond Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-1 FEP-2 FEP-3 FEP-3DUP MWA-17

Date Sampled 05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 12 8 < 5 < 5 6

Fluoride, Total 4000 2200 2700 11900 300 300 2400

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 38.9*

Arsenic 50 0.045 < 18.9* < 18.9* 42.8 28.7 < 18.9*

Barium 2000 2600 296 684 882 840 1860

Beryllium 4 73 1.67 2.89 5.22 5 1.78

Cadmium 5 18 2.22 2.89 < 2.22* < 2.22* 4.22

Chromium 100 110 46.3 51.6 109 109 51.7

Cobalt N/A 730 221 31.3 74.8 70.6 56.9

Copper 1300 1500 43.8 37.7 226 215 157

Lead 15 NA 64.2 74.9 154 132 118

Mercury 2 3.7 0.109 < 0.1 0.321 0.362 < 0.1

Nickel N/A 730 96.4 73.2 125 124 96.8

Selenium 50 180 < 24.4 < 24.4 25.2 < 24.4 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 81.1* < 81.1*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 55 84.7 222 215 64

Zinc N/A 11000 158 196 415 416 327

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-6 (May 2001).xls(fepq2gwcdh)\5/23/2006(4:20 PM)
Table 5-6

Final Effluent Pond Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-1 FEP-2 FEP-3 FEP-3DUP MWA-17

Date Sampled 05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A NA < 10 < 10 < 10 < 10 < 10

Acetamide, N-9H-Fluoren-2-yl N/A N/A < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 3.2 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10* < 10* < 10* < 10* < 10*

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-6 (May 2001).xls(fepq2gwcdh)\5/23/2006(4:20 PM)
Table 5-6

Final Effluent Pond Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-1 FEP-2 FEP-3 FEP-3DUP MWA-17

Date Sampled 05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A 1.5 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 4.7 2.3 1.5 1.3 1.4

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-6 (May 2001).xls(fepq2gwcdh)\5/23/2006(4:20 PM)
Table 5-6

Final Effluent Pond Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-1 FEP-2 FEP-3 FEP-3DUP MWA-17

Date Sampled 05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.2 22.2 < 10* < 10* 19.5

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 8.4 116 6 6.2 135

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-6 (May 2001).xls(fepq2gwcdh)\5/23/2006(4:20 PM)
Table 5-6

Final Effluent Pond Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-1 FEP-2 FEP-3 FEP-3DUP MWA-17

Date Sampled 05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-6 (May 2001).xls(fepq2gwcdh)\5/23/2006(4:20 PM)
Table 5-7

Final Effluent Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-1 FEP-1DUP FEP-2 FEP-3 MWA-17

Date Sampled 08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 3200 3200 11000 200 1900

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 38.9*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* < 18.9* < 18.9*

Barium 2000 2600 293 231 338 370 461

Beryllium 4 73 1.11 0.667 0.667 1.67 < 0.444

Cadmium 5 18 < 2.22 < 2.22 < 2.22 < 2.22 < 2.22

Chromium 100 110 31.2 20.2 < 8.89 36.3 < 8.89

Cobalt N/A 730 106 60 8.67 17.7 6.89

Copper 1300 1500 29.2 37 21.6 49.3 30.6

Lead 15 NA < 42.2* < 42.2* < 42.2* < 42.2* < 42.2*

Mercury 2 3.7 < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

Nickel N/A 730 72.4 70.6 30.2 35.3 12.3

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 24.4 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* 135 < 81.1*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 50.6 29 13 81.3 4.89

Zinc N/A 11000 87.1 62.1 27 105 38.9

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chlorophenol N/A 490 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-7 (Aug 2001).xls(fepq3gwcdh)\5/23/2006(4:21 PM)
Table 5-7

Final Effluent Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-1 FEP-1DUP FEP-2 FEP-3 MWA-17

Date Sampled 08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Methylnaphthalene N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 120 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A N/A < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A 0.0073 < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A 1800 < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A N/A < 10* < 10* < 10* < 10* < 10*

4-Bromophenyl phenyl ether N/A 37 < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A 150 < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A 290 < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A N/A < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A 2 < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A 370 < 10 < 10 < 10 < 10 < 10

Acetamide, N-9H-Fluoren-2-yl N/A NA < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-7 (Aug 2001).xls(fepq3gwcdh)\5/23/2006(4:21 PM)
Table 5-7

Final Effluent Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-1 FEP-1DUP FEP-2 FEP-3 MWA-17

Date Sampled 08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 4.4 < 10* < 10* < 10* 3

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-7 (Aug 2001).xls(fepq3gwcdh)\5/23/2006(4:21 PM)
Table 5-7

Final Effluent Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-1 FEP-1DUP FEP-2 FEP-3 MWA-17

Date Sampled 08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-7 (Aug 2001).xls(fepq3gwcdh)\5/23/2006(4:21 PM)
Table 5-7

Final Effluent Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-1 FEP-1DUP FEP-2 FEP-3 MWA-17

Date Sampled 08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.4 1.4 15 < 10* 1.4

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 8.6 8.5 103 6.1 11.9

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene N/A 61 2.6 2.6 4.3 < 10 < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-7 (Aug 2001).xls(fepq3gwcdh)\5/23/2006(4:21 PM)
Table 5-8

Final Effluent Pond Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 4000 3800 13000 200 2600

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 58.7* < 58.7* < 58.7* < 58.7* < 58.7*

Arsenic 50 0.045 < 27.7* < 27.7* < 27.7* < 27.7* < 27.7*

Barium 2000 2600 181 224 339 236 515

Beryllium 4 73 0.889 1.33 1.33 0.889 0.667

Cadmium 5 18 < 3.78 < 3.78 < 3.78 < 3.78 < 3.78

Chromium 100 110 25.9 34.1 25.1 16.4 13.1

Cobalt N/A 730 81.8 86.3 17.7 8.33 19

Copper 1300 1500 23.4 35.7 21.2 19.6 24.6

Lead 15 NA < 54.3* < 54.3* < 54.3* < 54.3* < 54.3*

Mercury 2 3.7 1.12 < 0.2 < 0.2 < 0.2 < 0.2

Nickel N/A 730 70.1 75.6 42.6 13.3 36

Selenium 50 180 < 28.6 < 28.6 < 28.6 < 28.6 < 28.6

Silver N/A 180 < 9 < 9 < 9 < 9 < 9

Thallium 2 2.6 < 67.7* < 67.7* < 67.7* < 67.7* < 67.7*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 29.8 40.8 31.3 28 15.8

Zinc N/A 11000 98.2 111 72.7 71.8 129

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10.1 < 10 < 10.3 < 10.2 < 10

1,2,4-Trichlorobenzene 70 190 < 10.1 < 10 < 10.3 < 10.2 < 10

1,2-Dichlorobenzene 600 270 < 10.1 < 10 < 10.3 < 10.2 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10.1 < 10 < 10.3 < 10.2 < 10

1,3-Dichlorobenzene 600 180 < 10.1 < 10 < 10.3 < 10.2 < 10

1,3-Dinitrobenzene N/A 3.7 < 10.1* < 10* < 10.3* < 10.2* < 10*

1,4-Dichlorobenzene 75 0.47 < 10.1* < 10* < 10.3* < 10.2* < 10*

1,4-Naphthoquinone N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

1-Methyl Naphthalene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

1-Naphthylamine N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10.1 < 10 < 10.3 < 10.2 < 10

2,4,5-Trichlorophenol N/A 3700 < 10.1 < 10 < 10.3 < 10.2 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10.1* < 10* < 10.3* < 10.2* < 10*

2,4-Dichlorophenol N/A 110 < 10.1 < 10 < 10.3 < 10.2 < 10

2,4-Dimethylphenol N/A 730 < 10.1 < 10 < 10.3 < 10.2 < 10

2,4-Dinitrophenol N/A 73 < 10.1 < 10 < 10.3 < 10.2 < 10

2,4-Dinitrotoluene N/A 73 < 10.1 < 10 < 10.3 < 10.2 < 10

2,6-Dichlorophenol N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

2,6-Dinitrotoluene N/A 37 < 10.1 < 10 < 10.3 < 10.2 < 10

2-Acetylaminofluorene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

2-Chloronaphthalene N/A 490 < 10.1 < 10 < 10.3 < 10.2 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-8 (Nov 2001).xls(fepq4gwcdh)\5/23/2006(4:22 PM)
Table 5-8

Final Effluent Pond Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Chlorophenol N/A 30 < 10.1 < 10 < 10.3 < 10.2 < 10

2-Methylnaphthalene N/A 120 < 10.1 < 10 < 10.3 < 10.2 < 10

2-Methylphenol N/A 1800 < 10.1 < 10 < 10.3 < 10.2 < 10

2-Nitroaniline N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

2-Nitrophenol N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

2-Picoline N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10.1* < 10* < 10.3* < 10.2* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10.1* < 10* < 10.3* < 10.2* < 10*

3-Methylcholanthrene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

3-Methylphenol N/A 1800 < 10.1 < 10 < 10.3 < 10.2 < 10

3-Nitroaniline N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10.1 < 10 < 10.3 < 10.2 < 10

4-Bromophenyl phenyl ether N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4-Chloro-3-methylphenol N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4-Chloroaniline N/A 150 < 10.1 < 10 < 10.3 < 10.2 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4-Dimethylaminoazobenzene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4-Methylphenol N/A 180 < 10.1 < 10 < 10.3 < 10.2 < 10

4-Nitroaniline N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

4-Nitrophenol N/A 290 < 10.1 < 10 < 10.3 < 10.2 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

5-nitro-o-Toluidine N/A 2 < 10.1* < 10* < 10.3* < 10.2* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Acenaphthene N/A 370 < 10.1 < 10 < 10.3 < 10.2 < 10

Acenaphthylene N/A NA < 10.1 < 10 < 10.3 < 10.2 < 10

Acetophenone N/A 0.042 < 10.1* < 10* < 10.3* < 10.2* < 10*

Anthracene N/A 1800 < 10.1 < 10 < 10.3 < 10.2 < 10

Azobenzene N/A 0.61 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzenamine N/A 12 < 10.1 < 10 < 10.3 < 10.2 < 10

Benzidine N/A 0.00029 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzo(a)anthracene N/A 0.092 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzo(ghi)perylene N/A NA < 10.1 < 10 < 10.3 < 10.2 < 10

Benzo(k)fluoranthene N/A 0.92 < 10.1* < 10* < 10.3* < 10.2* < 10*

Benzoic Acid N/A 150000 < 10.1 < 10 < 10.3 < 10.2 < 10

Benzyl Alcohol N/A 11000 < 10.1 < 10 < 10.3 < 10.2 < 10

Butyl benzyl phthalate N/A 7300 < 10.1 < 10 < 10.3 < 10.2 < 10

Carbazole N/A 3.3 < 10.1* < 10* < 10.3* < 10.2* < 10*

Chlorobenzilate N/A 0.25 < 10.1* < 10* < 10.3* < 10.2* < 10*

Chrysene N/A 9.2 < 10.1* < 10* < 10.3* < 10.2* < 10*

Di-n-butyl phthalate N/A 3700 < 10.1 < 10 < 10.3 < 10.2 < 10

Di-n-octyl phthalate N/A 730 < 10.1 < 10 < 10.3 < 10.2 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10.1* < 10* < 10.3* < 10.2* < 10*

Dibenzofuran N/A 24 < 10.1 < 10 < 10.3 < 10.2 < 10

Diethyl phthalate N/A 29000 < 10.1 < 10 < 10.3 < 10.2 < 10

Dimethyl phthalate N/A 370000 < 10.1 < 10 < 10.3 < 10.2 < 10

Dinoseb 7 37 < 10.1* < 10* < 10.3* < 10.2* < 10*

Diphenylamine N/A 910 < 10.1 < 10 < 10.3 < 10.2 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-8 (Nov 2001).xls(fepq4gwcdh)\5/23/2006(4:22 PM)
Table 5-8

Final Effluent Pond Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Ethyl Methanesulfonate N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Fluoranthene N/A 1500 < 10.1 < 10 < 10.3 < 10.2 < 10

Fluorene N/A 240 < 10.1 < 10 < 10.3 < 10.2 < 10

Hexachlorobenzene 1 0.042 < 10.1* < 10* < 10.3* < 10.2* < 10*

Hexachlorobutadiene N/A 0.86 < 10.1* < 10* < 10.3* < 10.2* < 10*

Hexachlorocyclopentadiene 50 220 < 10.1 < 10 < 10.3 < 10.2 < 10

Hexachloroethane N/A 4.8 < 10.1* < 10* < 10.3* < 10.2* < 10*

Hexachloropropene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10.1* < 10* < 10.3* < 10.2* < 10*

Isophorone N/A 70 < 10.1 < 10 < 10.3 < 10.2 < 10

Isosafrole N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Methapyrilene N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Methyl Methanesulfonate N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10.1* < 10* < 10.3* < 10.2* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10.1* < 10* < 10.3* < 10.2* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10.1* < 10* < 10.3* < 10.2* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10.1* < 10* < 10.3* < 10.2* < 10*

N-Nitrosomorpholine N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

N-Nitrosopiperidine N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10.1* < 10* < 10.3* < 10.2* < 10*

Naphthalene N/A 6.5 < 10.1* < 10* < 10.3* < 10.2* < 10*

Nitrobenzene N/A 3.5 < 10.1* < 10* < 10.3* < 10.2* < 10*

Pentachlorobenzene N/A 29 < 10.1 < 10 < 10.3 < 10.2 < 10

Pentachloroethane N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Pentachloronitrobenzene N/A 0.26 < 10.1* < 10* < 10.3* < 10.2* < 10*

Pentachlorophenol 1 0.56 < 10.1* < 10* < 10.3* < 10.2* < 10*

Phenacetin N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Phenanthrene N/A NA < 10.1 < 10 < 10.3 < 10.2 < 10

Phenol N/A 22000 < 10.1 < 10 < 10.3 < 10.2 < 10

Pronamide N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

Pyrene N/A 180 < 10.1 < 10 < 10.3 < 10.2 < 10

Pyridine N/A 37 < 10.1 < 10 < 10.3 < 10.2 < 10

Safrole N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

beta-Naphthylamine N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10.1 < 10 < 10.3 < 10.2 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10.1* < 10* < 10.3* < 10.2* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10.1* < 10* < 10.3* < 10.2* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 2 1.9 4.3 3.6 4.5

n-Nitroso-di-n-propylamine N/A 0.0096 < 10.1* < 10* < 10.3* < 10.2* < 10*

o-Toluidine N/A 0.28 < 10.1* < 10* < 10.3* < 10.2* < 10*

p-Phenylenediamine N/A 6900 < 10.1 < 10 < 10.3 < 10.2 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-8 (Nov 2001).xls(fepq4gwcdh)\5/23/2006(4:22 PM)
Table 5-8

Final Effluent Pond Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-8 (Nov 2001).xls(fepq4gwcdh)\5/23/2006(4:22 PM)
Table 5-8

Final Effluent Pond Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.9 2 13.1 < 10* 46.5

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 38.4 38.1 254 5 214

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 3.2 3.2 7 < 10 24.4

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-8 (Nov 2001).xls(fepq4gwcdh)\5/23/2006(4:22 PM)
Table 5-9

Final Effluent Pond Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/02 02/14/02 02/14/02 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 2410 2320 8370 400 1910

Antimony 6 15 < 58.7* < 58.7* < 58.7* < 58.7* < 58.7*

Arsenic 50 0.045 < 27.7* < 27.7* < 27.7* < 27.7* < 27.7*

Barium 2000 2600 150 143 342 221 154

Beryllium 4 73 0.333 0.333 0.778 < 0.233 < 0.233

Cadmium 5 18 < 3.78 < 3.78 < 3.78 < 3.78 < 3.78

Chromium 100 110 12.9 13.9 16.4 9.67 < 8.89

Cobalt N/A 730 36.2 35.9 9.22 3.56 < 3.33

Copper 1300 1500 13.1 15.8 10.3 7.22 9

Lead 15 N/A < 54.3* < 54.3* < 54.3* < 54.3* < 54.3*

Mercury 2 3.7 < 0.2 < 0.2 < 0.2 < 0.2

Nickel N/A 730 42.6 43.6 33.8 < 11.3 < 11.3

Selenium 50 180 < 28.6 < 28.6 < 28.6 < 28.6 < 28.6

Silver N/A 180 < 9 < 9 < 9 < 9 < 9

Thallium 2 2.6 < 67.7* < 67.7* < 67.7* < 67.7* < 67.7*

Tin N/A 22000 < 12.2 < 12.2 < 12.2 < 12.2 < 12.2

Vanadium N/A 260 13.9 10.4 19.4 9.33 < 4.78

Zinc N/A 11000 37.2 35.4 41.6 37.6 17.9

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-9 (Feb 2002).xls(fepq102gwcdh)\5/23/2006(4:22 PM)
Table 5-9

Final Effluent Pond Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/02 02/14/02 02/14/02 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-9 (Feb 2002).xls(fepq102gwcdh)\5/23/2006(4:22 PM)
Table 5-9

Final Effluent Pond Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/02 02/14/02 02/14/02 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A 1.1 1.2 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* 1.4 4.8 1.7 1.6

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 10* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-9 (Feb 2002).xls(fepq102gwcdh)\5/23/2006(4:22 PM)
Table 5-9

Final Effluent Pond Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/02 02/14/02 02/14/02 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 10 < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 1.6 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-9 (Feb 2002).xls(fepq102gwcdh)\5/23/2006(4:22 PM)
Table 5-9

Final Effluent Pond Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FEP-1DUP FEP-1 FEP-2 FEP-3 MWA-17

Date Sampled 02/14/02 02/14/02 02/14/02 02/14/02 02/14/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 1.4 1.4 9.6 < 10* 1.3

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 8.3 8.2 30.1 2.4 10.2

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 2.2 2.2 1.1 < 10 1.2

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-9 (Feb 2002).xls(fepq102gwcdh)\5/23/2006(4:22 PM)
Table 5-10

Landfill 1 Groundwater Monitoring Data

February 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

FL-1 FL-1DUP FL-2 FL-3 FL-4

02/26/01 02/26/01 02/26/01 02/26/01 02/26/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 < 100 < 100 100 100 100

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 38.9*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* 27.3 < 18.9*

Barium 2000 2600 333 5720 522 556 176

Beryllium 4 73 2.11 2.22 4.11 3.89 1.56

Cadmium 5 18 < 2.22 < 2.22 < 2.22 6.78 < 2.22

Chromium 100 110 33.7 38.7 88.4 72 27.3

Cobalt N/A 730 20.6 21.6 63.8 56.3 19

Copper 1300 1500 44 49.2 97.8 94.1 25.3

Lead 15 NA < 42.2* < 42.2* 79.8 85.3 < 42.2*

Mercury 2 3.7 < 0.1 0.119 < 0.1 0.211 < 0.1

Nickel N/A 730 36.1 45 93.9 94.8 31.4

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 24.4 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 81.1* < 81.1*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 65.2 69.3 126 123 47.4

Zinc N/A 11000 148 156 320 275 121

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 2* < 2* < 2* < 2* < 2*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

Sample Number

Date Sampled

KN6\BWXT\FEP\02 GWAR\Table 5-10 (LF-1 Feb 2001).xls(flq1gwcdh)\5/23/2006(4:23 PM)
Table 5-10

Landfill 1 Groundwater Monitoring Data

February 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A NA < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-10 (LF-1 Feb 2001).xls(flq1gwcdh)\5/23/2006(4:23 PM)
Table 5-10

Landfill 1 Groundwater Monitoring Data

February 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* < 10* < 10* < 10* < 10*

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* 6.4 < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 10 < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 10* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 10 < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 10* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-10 (LF-1 Feb 2001).xls(flq1gwcdh)\5/23/2006(4:23 PM)
Table 5-10

Landfill 1 Groundwater Monitoring Data

February 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 10* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 10* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 10* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 10* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 10* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 10 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 10 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 100* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 10 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10* < 10* < 10* < 10* < 10*

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 10 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 10 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 100* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 100* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 10 < 10

Acetone N/A 610 < 10 < 10 < 10 < 10 < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 100 < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 10 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 10* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 10 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 10* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 10* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 10* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 10 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 10* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 10 < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 10* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 10* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 10* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 10 < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 10* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 10 < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 10 < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 100 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 10 < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 10 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 100 < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 10 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 10* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 100* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-10 (LF-1 Feb 2001).xls(flq1gwcdh)\5/23/2006(4:23 PM)
Table 5-10

Landfill 1 Groundwater Monitoring Data

February 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Methylene chloride 5 4.1 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 10 < 10

Tetrachloroethene 5 0.63 43.8 45.1 50.6 11800 < 10*

Toluene 1000 750 < 10 < 10 < 10 < 10 < 10

Trichloroethene 5 0.026 28.7 29.8 5.4 121 < 10*

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 10 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 10 < 10

Vinyl Chloride 2 0.015 1.9 2 < 10* < 10* < 10*

cis-1,2-Dichloroethene 70 61 50.9 53.7 < 10 3.7 < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 10 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 10 < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 10 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 10 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 10* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 10 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 10 < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 10* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-10 (LF-1 Feb 2001).xls(flq1gwcdh)\5/23/2006(4:23 PM)
Table 5-11

Landfill 1 Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

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05/16/01 05/16/01 05/16/01 05/16/01 05/16/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 6 7

Fluoride, Total 4000 2200 200 200 200 200 200

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 38.9*

Arsenic 50 0.045 30.6 40.8 34.9 37.8 56.8

Barium 2000 2600 533 372 375 411 624

Beryllium 4 73 3.67 2.44 3 2.78 5.89

Cadmium 5 18 < 2.22* < 2.22* < 2.22* < 2.22* < 2.22*

Chromium 100 110 77.3 51.8 66.9 61.8 121

Cobalt N/A 730 39.4 23.3 35.7 35.3 70.8

Copper 1300 1500 73 54.3 66 59.8 102

Lead 15 NA 111 68.7 85.9 76.3 124

Mercury 2 3.7 < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

Nickel N/A 730 76.7 49.6 69.2 66.1 131

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 24.4 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* 85.8 142

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 114 89.7 107 107 209

Zinc N/A 11000 252 166 239 212 457

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

Sample Number

Date Sampled

KN6\BWXT\FEP\02 GWAR\Table 5-11 (LF-1 May 2001).xls(flq2gwcdh)\5/23/2006(4:25 PM)
Table 5-11

Landfill 1 Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A NA < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-11 (LF-1 May 2001).xls(flq2gwcdh)\5/23/2006(4:25 PM)
Table 5-11

Landfill 1 Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* < 10* < 10* < 10* < 10*

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 1000* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 1000* < 10

KN6\BWXT\FEP\02 GWAR\Table 5-11 (LF-1 May 2001).xls(flq2gwcdh)\5/23/2006(4:25 PM)
Table 5-11

Landfill 1 Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 1000* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 1000* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 1000* < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 1000* < 10*

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 1000* < 10*

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 1000* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 1000* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 1000* < 10

1,2-Dichloroethane 5 0.12 < 10 < 10 < 10 < 1000* < 10

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 1000* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 1000* < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 1000* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 10000* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 1000 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 1000* < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 1000 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 10000* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 10000* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 1000* < 10

Acetone N/A 610 < 10 < 10 < 10 < 1000* 358

Acetonitrile N/A 120 < 100* < 100* < 100* < 10000* < 100*

Allyl Chloride N/A N/A < 10 < 10 < 10 < 1000 < 10

Benzene 5 0.32 < 10 < 10 < 10 < 1000 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 1000* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 1000* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 1000* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 1000 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 1000* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 1000* < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 1000* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 1000* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 1000* < 10*

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 1000* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 1000* < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 1000* < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 10000* < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 1000* < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 1000* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 1000 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 10000* < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 1000 < 10

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 10000* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 1000* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 1000* < 10

Tetrachloroethene 5 0.63 3.4 3.1 107 10900 5.4

Toluene 1000 750 < 10 < 10 < 10 < 1000* < 10

KN6\BWXT\FEP\02 GWAR\Table 5-11 (LF-1 May 2001).xls(flq2gwcdh)\5/23/2006(4:25 PM)
Table 5-11

Landfill 1 Groundwater Monitoring Data

May 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Trichloroethene 5 0.026 91.5 78.5 9.4 407 < 10*

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 1000 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 1000* < 10

Vinyl Chloride 2 0.015 6 3.2 < 10* < 1000* < 10*

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 1000 < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 1000* < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 1000* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-11 (LF-1 May 2001).xls(flq2gwcdh)\5/23/2006(4:25 PM)
Table 5-12

Landfill 1 Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 < 100 < 100 < 100 < 100 200

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 38.9* < 38.9* < 38.9* < 38.9* < 38.9*

Arsenic 50 0.045 < 18.9* < 18.9* < 18.9* < 18.9* < 18.9*

Barium 2000 2600 809 701 403 446 689

Beryllium 4 73 5.33 4.33 3 4 4.33

Cadmium 5 18 < 2.22 < 2.22 < 2.22 < 2.22 < 2.22

Chromium 100 110 78 59.1 46.7 57.6 64.6

Cobalt N/A 730 66.1 56.3 46.4 52 72.4

Copper 1300 1500 97.6 69.4 51.6 58.4 85.2

Lead 15 NA 81 50.4 < 42.2* < 42.2* 79.2

Mercury 2 3.7 0.164 0.137 0.103 < 0.1 < 0.1

Nickel N/A 730 97.1 64.9 66.3 78.2 89.7

Selenium 50 180 < 24.4 < 24.4 < 24.4 < 24.4 < 24.4

Silver N/A 180 < 7.78 < 7.78 < 7.78 < 7.78 < 7.78

Thallium 2 2.6 < 81.1* < 81.1* < 81.1* < 81.1* < 81.1*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 104 74.6 68.4 89.2 99

Zinc N/A 11000 271 197 191 272 263

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 N/A 0.033 < 1 < 1 < 1 < 1 < 1

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A NA < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

Sample Number

Date Sampled

KN6\BWXT\FEP\02 GWAR\Table 5-12 (LF-1 Aug 2001).xls(flq3gwcdh)\5/23/2006(4:26 PM)
Table 5-12

Landfill 1 Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A NA < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10 < 10 < 10 < 10 < 10

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-12 (LF-1 Aug 2001).xls(flq3gwcdh)\5/23/2006(4:26 PM)
Table 5-12

Landfill 1 Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* < 10* < 10* < 10* < 10*

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 1000* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 1000* < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 1000* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 1000* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 1000* < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 1000* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-12 (LF-1 Aug 2001).xls(flq3gwcdh)\5/23/2006(4:26 PM)
Table 5-12

Landfill 1 Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 1000* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 1000* < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 1000 < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 1000* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 1000* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 1000* < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 1000* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 1000* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 1000* < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 1000* < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 1000 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 1000* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 10000* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 1000 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 1000* < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 1000 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 1000* < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 10000* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 10000* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 1000* < 10

Acetone N/A 610 < 10 < 10 < 10 < 1000* < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 10000* < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 1000 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 1000* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 1000 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 1000* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 1000* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 1000* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 1000 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 1000* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 1000* < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 1000* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 1000* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 1000* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 1000* < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 1000* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 1000* < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 1000* < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 10000 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 1000* < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 1000* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 1000* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 1000 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 10000* < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 1000 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10 < 10 < 10 < 1000 < 10

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 10000* < 100*

KN6\BWXT\FEP\02 GWAR\Table 5-12 (LF-1 Aug 2001).xls(flq3gwcdh)\5/23/2006(4:26 PM)
Table 5-12

Landfill 1 Groundwater Monitoring Data

August 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

FL-1 FL-1DUP FL-2 FL-3 FL-4

08/22/01 08/22/01 08/22/01 08/22/01 08/22/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Methylene chloride 5 4.1 < 10* < 10* < 10* < 1000* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 1000* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 1000* < 10

Tetrachloroethene 5 0.63 22.2 22.6 46.8 6720 < 10*

Toluene 1000 750 < 10 < 10 < 10 < 1000* < 10

Trichloroethene 5 0.026 53 54.2 5.1 268 < 10*

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 1000 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 1000* < 10

Vinyl Chloride 2 0.015 2.4 2.5 < 10* < 1000* < 10*

cis-1,2-Dichloroethene 70 61 86 87.2 < 10 < 1000* < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 1000 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 1000* < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 1000 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 1000 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 1000* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 1000* < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 1000* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

KN6\BWXT\FEP\02 GWAR\Table 5-12 (LF-1 Aug 2001).xls(flq3gwcdh)\5/23/2006(4:26 PM)
Table 5-13

Landfill 1 Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

FL-1DUP FL-1 FL-2 FL-3 FL-4

11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 < 5 < 5 < 5 < 5 < 5

Fluoride, Total 4000 2200 200 200 < 100 < 100 < 100

Sulfide N/A N/A < 1000 < 1000 < 1000 < 1000 < 1000

Antimony 6 15 < 58.7* < 58.7* < 58.7* < 58.7* < 58.7*

Arsenic 50 0.045 56.6 45.7 73.2 83.9 72

Barium 2000 2600 572 378 416 570 343

Beryllium 4 73 3.67 2.33 3.44 4 3.11

Cadmium 5 18 < 3.78 < 3.78 < 3.78 < 3.78 < 3.78

Chromium 100 110 79 47.2 83.3 93.7 70

Cobalt N/A 730 43.1 23.8 49.2 59.4 45

Copper 1300 1500 74.6 43.6 78.9 184 46.2

Lead 15 NA < 54.3* < 54.3* < 54.3* < 54.3* < 54.3*

Mercury 2 3.7 0.598 < 0.2 < 0.2 < 0.2 < 0.2

Nickel N/A 730 79.4 46.2 73.4 93.3 90.8

Selenium 50 180 < 28.6 < 28.6 < 28.6 < 28.6 29.1

Silver N/A 180 < 9 < 9 < 9 < 9 < 9

Thallium 2 2.6 < 67.7* < 67.7* < 67.7* < 67.7* < 67.7*

Tin N/A 22000 < 40 < 40 < 40 < 40 < 40

Vanadium N/A 260 126 78.8 103 143 112

Zinc N/A 11000 285 182 302 311 310

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

GROUNDWATER

Sample Number

Date Sampled

KN6\BWXT\FEP\02 GWAR\Table 5-13 (LF-1 Nov 2001).xls(flq4gwcdh)\5/23/2006(4:27 PM)
Table 5-13

Landfill 1 Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

FL-1DUP FL-1 FL-2 FL-3 FL-4

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A NA < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A NA < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 < 10 < 10 < 10 < 10 < 10

Di-n-octyl phthalate N/A 730 < 10 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-13 (LF-1 Nov 2001).xls(flq4gwcdh)\5/23/2006(4:27 PM)
Table 5-13

Landfill 1 Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

FL-1DUP FL-1 FL-2 FL-3 FL-4

11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A NA < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 < 10* < 10* < 10* < 10* < 10*

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 1000* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 1000* < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 1000* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 1000* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 1000* < 10

KN6\BWXT\FEP\02 GWAR\Table 5-13 (LF-1 Nov 2001).xls(flq4gwcdh)\5/23/2006(4:27 PM)
Table 5-13

Landfill 1 Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

FL-1DUP FL-1 FL-2 FL-3 FL-4

11/12/01 11/12/01 11/12/01 11/12/01 11/12/01

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 1000* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 1000* < 10*

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 1000* < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 1000* < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 1000* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 1000* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 1000* < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 1000* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 1000* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 1000* < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 1000* < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 1000 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 1000* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 10000* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 1000 < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 1000* < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 1000 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 1000 < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 10000* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 10000* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 1000* < 10

Acetone N/A 610 < 10 < 10 < 10 < 1000* < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 10000* < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 1000 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 1000* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 1000 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 1000 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 1000* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 1000* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 1000* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 1000 < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 1000* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 1000* < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 1000* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 1000* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 1000* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 1000* < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 1000* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 1000* < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 1000* < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 10000 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 1000* < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 1000* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 1000* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 1000 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-13 (LF-1 Nov 2001).xls(flq4gwcdh)\5/23/2006(4:27 PM)
Table 5-13

Landfill 1 Groundwater Monitoring Data

November 2001 Sampling Event

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

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MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Sample Number

Date Sampled

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 10000* < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 1000 < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 1000* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 10000* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 1000* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 1000* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 1000* < 10

Tetrachloroethene 5 0.63 29.8 29.8 45 4120 < 10*

Toluene 1000 750 < 10 < 10 < 10 < 1000* < 10

Trichloroethene 5 0.026 41.6 40.2 4.6 228 < 10*

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 1000 < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 1000* < 10

Vinyl Chloride 2 0.015 2 2 < 10* < 1000* < 10*

cis-1,2-Dichloroethene 70 61 60.9 60.6 < 10 < 1000* < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 1000 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 1000* < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 1000 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 1000 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 1000* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 1000* < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 1000* < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 1000* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 1000* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-13 (LF-1 Nov 2001).xls(flq4gwcdh)\5/23/2006(4:27 PM)
Table 5-14

Landfill 1 Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc

Mt. Athos Site, Lynchburg, Virginia

(Page 1 of 5)

Sample Number FL-1DUP FL-1 FL-2 FL-3 FL-4

Date Sampled 02/15/02 02/15/02 02/15/02 02/15/02 02/15/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

Cyanide, Total 200 730 12 13 83 < 5 < 5

Fluoride, Total 4000 2200 140 140 140 220 140

Antimony 6 15 < 58.7* < 58.7* < 58.7* < 58.7* < 58.7*

Arsenic 50 0.045 < 27.7* < 27.7* 49.8 80 44.3

Barium 2000 2600 393 308 633 1200 447

Beryllium 4 73 2.33 1.67 4.56 8.22 3.56

Cadmium 5 18 < 3.78 < 3.78 < 3.78 6.56 < 3.78

Chromium 100 110 61 42.6 133 210 87.4

Cobalt N/A 730 28.3 19.1 64.6 113 50.4

Copper 1300 1500 53.2 39 112 190 79.7

Lead 15 N/A < 54.3* < 54.3* 58.4 166 62.6

Mercury 2 3.7 < 0.2 < 0.2 < 0.2 0.3 < 0.2

Nickel N/A 730 55.2 34.6 119 198 95.6

Selenium 50 180 29.1 < 28.6 < 28.6 < 28.6 < 28.6

Silver N/A 180 < 9 < 9 < 9 < 9 1790

Thallium 2 2.6 < 67.7* < 67.7* < 67.7* < 67.7* < 67.7*

Tin N/A 22000 < 12.2 < 12.2 < 12.2 < 12.2 < 12.2

Vanadium N/A 260 87.1 64.1 183 341 143

Zinc N/A 11000 191 148 439 657 322

Aroclor 1016 0.5 0.96 < 1* < 1* < 1* < 1* < 1*

Aroclor 1221 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1232 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1242 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1248 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1254 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

Aroclor 1260 0.5 0.033 < 1* < 1* < 1* < 1* < 1*

(1,1'-Biphenyl)-4-Amine N/A N/A < 10 < 10 < 10 < 10 < 10

1,2,4,5-Tetrachlorobenzene N/A 11 < 10 < 10 < 10 < 10 < 10

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 10 < 10

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 10 < 10

1,3,5-Trinitrobenzene N/A 1100 < 10 < 10 < 10 < 10 < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 10 < 10

1,3-Dinitrobenzene N/A 3.7 < 10* < 10* < 10* < 10* < 10*

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 10* < 10*

1,4-Naphthoquinone N/A N/A < 10 < 10 < 10 < 10 < 10

1-Methyl Naphthalene N/A N/A < 10 < 10 < 10 < 10 < 10

1-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

2,3,4,6-Tetrachlorophenol N/A 1100 < 10 < 10 < 10 < 10 < 10

2,4,5-Trichlorophenol N/A 3700 < 10 < 10 < 10 < 10 < 10

2,4,6-Trichlorophenol N/A 6.1 < 10* < 10* < 10* < 10* < 10*

2,4-Dichlorophenol N/A 110 < 10 < 10 < 10 < 10 < 10

2,4-Dimethylphenol N/A 730 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrophenol N/A 73 < 10 < 10 < 10 < 10 < 10

2,4-Dinitrotoluene N/A 73 < 10 < 10 < 10 < 10 < 10

2,6-Dichlorophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2,6-Dinitrotoluene N/A 37 < 10 < 10 < 10 < 10 < 10

2-Acetylaminofluorene N/A N/A < 10 < 10 < 10 < 10 < 10

2-Chloronaphthalene N/A 490 < 10 < 10 < 10 < 10 < 10

2-Chlorophenol N/A 30 < 10 < 10 < 10 < 10 < 10

GROUNDWATER

KN6\BWXT\FEP\02 GWAR\Table 5-14 (LF-1 Feb 2002).xls(flq102gwcdh)\5/23/2006(4:28 PM)
Table 5-14

Landfill 1 Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc

Mt. Athos Site, Lynchburg, Virginia

(Page 2 of 5)

Sample Number FL-1DUP FL-1 FL-2 FL-3 FL-4

Date Sampled 02/15/02 02/15/02 02/15/02 02/15/02 02/15/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

2-Methylnaphthalene N/A 120 < 10 < 10 < 10 < 10 < 10

2-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

2-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

2-Nitrophenol N/A N/A < 10 < 10 < 10 < 10 < 10

2-Picoline N/A N/A < 10 < 10 < 10 < 10 < 10

3,3-Dichlorobenzidine N/A 0.15 < 10* < 10* < 10* < 10* < 10*

3,3-Dimethylbenzidine N/A 0.0073 < 10* < 10* < 10* < 10* < 10*

3-Methylcholanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

3-Methylphenol N/A 1800 < 10 < 10 < 10 < 10 < 10

3-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4,6-Dinitro-2-methylphenol N/A 37 < 10 < 10 < 10 < 10 < 10

4-Bromophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloro-3-methylphenol N/A N/A < 10 < 10 < 10 < 10 < 10

4-Chloroaniline N/A 150 < 10 < 10 < 10 < 10 < 10

4-Chlorophenyl phenyl ether N/A N/A < 10 < 10 < 10 < 10 < 10

4-Dimethylaminoazobenzene N/A N/A < 10 < 10 < 10 < 10 < 10

4-Methylphenol N/A 180 < 10 < 10 < 10 < 10 < 10

4-Nitroaniline N/A N/A < 10 < 10 < 10 < 10 < 10

4-Nitrophenol N/A 290 < 10 < 10 < 10 < 10 < 10

4-Nitroquinoline-1-Oxide N/A N/A < 10 < 10 < 10 < 10 < 10

5-nitro-o-Toluidine N/A 2 < 10* < 10* < 10* < 10* < 10*

7,12-Dimethylbenz(a)Anthracene N/A N/A < 10 < 10 < 10 < 10 < 10

Acenaphthene N/A 370 < 10 < 10 < 10 < 10 < 10

Acenaphthylene N/A N/A < 10 < 10 < 10 < 10 < 10

Acetophenone N/A 0.042 < 10* < 10* < 10* < 10* < 10*

Anthracene N/A 1800 < 10 < 10 < 10 < 10 < 10

Azobenzene N/A 0.61 < 10* < 10* < 10* < 10* < 10*

Benzenamine N/A 12 < 10 < 10 < 10 < 10 < 10

Benzidine N/A 0.00029 < 10* < 10* < 10* < 10* < 10*

Benzo(a)anthracene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(a)pyrene 0.2 0.0092 < 10* < 10* < 10* < 10* < 10*

Benzo(b)fluoranthene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Benzo(ghi)perylene N/A N/A < 10 < 10 < 10 < 10 < 10

Benzo(k)fluoranthene N/A 0.92 < 10* < 10* < 10* < 10* < 10*

Benzoic Acid N/A 150000 < 10 < 10 < 10 < 10 < 10

Benzyl Alcohol N/A 11000 < 10 < 10 < 10 < 10 < 10

Butyl benzyl phthalate N/A 7300 < 10 < 10 < 10 < 10 < 10

Carbazole N/A 3.3 < 10* < 10* < 10* < 10* < 10*

Chlorobenzilate N/A 0.25 < 10* < 10* < 10* < 10* < 10*

Chrysene N/A 9.2 < 10* < 10* < 10* < 10* < 10*

Di-n-butyl phthalate N/A 3700 2.7 < 10 < 10 < 10 1

Di-n-octyl phthalate N/A 730 24.3 < 10 < 10 < 10 < 10

Dibenz(a,h)anthracene N/A 0.0092 < 10* < 10* < 10* < 10* < 10*

Dibenzofuran N/A 24 < 10 < 10 < 10 < 10 < 10

Diethyl phthalate N/A 29000 < 10 < 10 < 10 < 10 < 10

Dimethyl phthalate N/A 370000 < 10 < 10 < 10 < 10 < 10

Dinoseb 7 37 < 10* < 10* < 10* < 10* < 10*

Diphenylamine N/A 910 < 10 < 10 < 10 < 10 < 10

Ethyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

KN6\BWXT\FEP\02 GWAR\Table 5-14 (LF-1 Feb 2002).xls(flq102gwcdh)\5/23/2006(4:28 PM)
Table 5-14

Landfill 1 Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc

Mt. Athos Site, Lynchburg, Virginia

(Page 3 of 5)

Sample Number FL-1DUP FL-1 FL-2 FL-3 FL-4

Date Sampled 02/15/02 02/15/02 02/15/02 02/15/02 02/15/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Fluoranthene N/A 1500 < 10 < 10 < 10 < 10 < 10

Fluorene N/A 240 < 10 < 10 < 10 < 10 < 10

Hexachlorobenzene 1 0.042 < 10* < 10* < 10* < 10* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 10* < 10*

Hexachlorocyclopentadiene 50 220 < 10 < 10 < 10 < 10 < 10

Hexachloroethane N/A 4.8 < 10* < 10* < 10* < 10* < 10*

Hexachloropropene N/A N/A < 10 < 10 < 10 < 10 < 10

Indeno(1,2,3-cd)pyrene N/A 0.092 < 10* < 10* < 10* < 10* < 10*

Isophorone N/A 70 < 10 < 10 < 10 < 10 < 10

Isosafrole N/A N/A < 10 < 10 < 10 < 10 < 10

Methapyrilene N/A N/A < 10 < 10 < 10 < 10 < 10

Methyl Methanesulfonate N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosodi-N-Butylamine N/A 0.00193 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodiethylamine N/A 0.00045 < 10* < 10* < 10* < 10* < 10*

N-Nitrosodimethylamine N/A 0.0013 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomethylethylamine N/A 0.003 < 10* < 10* < 10* < 10* < 10*

N-Nitrosomorpholine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopiperidine N/A N/A < 10 < 10 < 10 < 10 < 10

N-Nitrosopyrrolidine N/A 0.032 < 10* < 10* < 10* < 10* < 10*

Naphthalene N/A 6.5 < 10* < 10* < 10* < 10* < 10*

Nitrobenzene N/A 3.5 < 10* < 10* < 10* < 10* < 10*

Pentachlorobenzene N/A 29 < 10 < 10 < 10 < 10 < 10

Pentachloroethane N/A N/A < 10 < 10 < 10 < 10 < 10

Pentachloronitrobenzene N/A 0.26 < 10* < 10* < 10* < 10* < 10*

Pentachlorophenol 1 0.56 < 10* < 10* < 10* < 10* < 10*

Phenacetin N/A N/A < 10 < 10 < 10 < 10 < 10

Phenanthrene N/A N/A < 10 < 10 < 10 < 10 < 10

Phenol N/A 22000 < 10 < 10 < 10 < 10 < 10

Pronamide N/A N/A < 10 < 10 < 10 < 10 < 10

Pyrene N/A 180 < 10 < 10 < 10 < 10 < 10

Pyridine N/A 37 < 10 < 10 < 10 < 10 < 10

Safrole N/A N/A < 10 < 10 < 10 < 10 < 10

beta-Naphthylamine N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethoxy)methane N/A N/A < 10 < 10 < 10 < 10 < 10

bis(2-Chloroethyl)ether N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

bis(2-Chloroisopropyl)ether N/A 0.26 < 10* < 10* < 10* < 10* < 10*

bis(2-Ethylhexyl)phthalate 6 4.8 25.7 < 10* < 10* 8.7 1.7

n-Nitroso-di-n-propylamine N/A 0.0096 < 10* < 10* < 10* < 10* < 10*

o-Toluidine N/A 0.28 < 10* < 10* < 10* < 10* < 10*

p-Phenylenediamine N/A 6900 < 10 < 10 < 10 < 10 < 10

1,1,1,2-Tetrachloroethane N/A 0.41 < 10* < 10* < 10* < 2500* < 10*

1,1,1-Trichloroethane 200 3200 < 10 < 10 < 10 < 2500* < 10

1,1,2,2-Tetrachloroethane N/A 0.053 < 10* < 10* < 10* < 2500* < 10*

1,1,2-Trichloroethane 5 0.19 < 10* < 10* < 10* < 2500* < 10*

1,1-Dichloroethane N/A 800 < 10 < 10 < 10 < 2500* < 10

1,1-Dichloroethene 7 0.044 < 10* < 10* < 10* < 2500* < 10*

1,1-Dichloropropene N/A N/A < 10 < 10 < 10 < 2500 < 10

1,2,3-Trichlorobenzene N/A N/A < 10 < 10 < 10 < 2500 < 10

1,2,3-Trichloropropane N/A 0.0053 < 10* < 10* < 10* < 2500* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-14 (LF-1 Feb 2002).xls(flq102gwcdh)\5/23/2006(4:28 PM)
Table 5-14

Landfill 1 Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc

Mt. Athos Site, Lynchburg, Virginia

(Page 4 of 5)

Sample Number FL-1DUP FL-1 FL-2 FL-3 FL-4

Date Sampled 02/15/02 02/15/02 02/15/02 02/15/02 02/15/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

1,2,4-Trichlorobenzene 70 190 < 10 < 10 < 10 < 2500* < 10

1,2,4-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 2500* < 10

1,2-Dibromo-3-Chloropropane 0.2 0.047 < 10* < 10* < 10* < 2500* < 10*

1,2-Dibromoethane N/A 0.00075 < 10* < 10* < 10* < 2500* < 10*

1,2-Dichlorobenzene 600 270 < 10 < 10 < 10 < 2500* < 10

1,2-Dichloroethane 5 0.12 < 10* < 10* < 10* < 2500* < 10*

1,2-Dichloropropane 5 0.16 < 10* < 10* < 10* < 2500* < 10*

1,2-Dimethylbenzene N/A N/A < 10 < 10 < 10 < 2500 < 10

1,3,5-Trimethylbenzene N/A 12 < 10 < 10 < 10 < 2500* < 10

1,3-Dichlorobenzene 600 180 < 10 < 10 < 10 < 2500* < 10

1,3-Dichloropropane N/A N/A < 10 < 10 < 10 < 2500 < 10

1,4-Dichlorobenzene 75 0.47 < 10* < 10* < 10* < 2500* < 10*

1,4-Dioxane N/A 6.1 < 100* < 100* < 100* < 25000* < 100*

2-Butanone N/A 1900 < 10 < 10 < 10 < 2500* < 10

2-Chloro-1,3-Butadiene N/A 14 < 10 < 10 < 10 < 2500* < 10

2-Chloroethyl Vinyl Ether N/A N/A < 10 < 10 < 10 < 2500 < 10

2-Hexanone N/A 1500 < 10 < 10 < 10 < 2500* < 10

2-Propenal N/A 0.042 < 100* < 100* < 100* < 25000* < 100*

2-Propenenitrile N/A 0.037 < 100* < 100* < 100* < 25000* < 100*

4-Methyl-2-pentanone N/A 140 < 10 < 10 < 10 < 2500* < 10

Acetone N/A 610 < 10 < 10 < 10 < 2500* < 10

Acetonitrile N/A 120 < 100 < 100 < 100 < 25000* < 100

Allyl Chloride N/A N/A < 10 < 10 < 10 < 2500 < 10

Benzene 5 0.32 < 10* < 10* < 10* < 2500* < 10*

Bromobenzene N/A N/A < 10 < 10 < 10 < 2500 < 10

Bromochloromethane N/A N/A < 10 < 10 < 10 < 2500 < 10

Bromodichloromethane 100 0.17 < 10* < 10* < 10* < 2500* < 10*

Bromoform 100 8.5 < 10* < 10* < 10* < 2500* < 10*

Bromomethane N/A 8.5 < 10* < 10* < 10* < 2500* < 10*

Carbon disulfide N/A 1000 < 10 < 10 < 10 < 2500* < 10

Carbon tetrachloride 5 0.16 < 10* < 10* < 10* < 2500* < 10*

Chlorobenzene 100 110 < 10 < 10 < 10 < 2500* < 10

Chloroethane N/A 3.6 < 10* < 10* < 10* < 2500* < 10*

Chloroform 100 0.15 < 10* < 10* < 10* < 2500* < 10*

Chloromethane N/A 2.1 < 10* < 10* < 10* < 2500* < 10*

Cumene N/A 660 < 10 < 10 < 10 < 2500* < 10

Dibromochloromethane 100 0.13 < 10* < 10* < 10* < 2500* < 10*

Dibromomethane N/A 61 < 10 < 10 < 10 < 2500* < 10

Dichlorodifluoromethane N/A 350 < 10 < 10 < 10 < 2500* < 10

Ethyl Cyanide N/A N/A < 100 < 100 < 100 < 25000 < 100

Ethyl Methacrylate N/A 550 < 10 < 10 < 10 < 2500* < 10

Ethylbenzene 700 3.3 < 10* < 10* < 10* < 2500* < 10*

Hexachlorobutadiene N/A 0.86 < 10* < 10* < 10* < 2500* < 10*

Iodomethane N/A N/A < 10 < 10 < 10 < 2500 < 10

Isobutyl Alcohol N/A 1800 < 100 < 100 < 100 < 25000* < 100

Methyl Methacrylate N/A 1400 < 10 < 10 < 10 < 2500* < 10

Methyl tert-Butyl Ether N/A 2.6 < 10* < 10* < 10* < 2500* < 10*

Methylacrylonitrile N/A 1 < 100* < 100* < 100* < 25000* < 100*

Methylene chloride 5 4.1 < 10* < 10* < 10* < 2500* < 10*

KN6\BWXT\FEP\02 GWAR\Table 5-14 (LF-1 Feb 2002).xls(flq102gwcdh)\5/23/2006(4:28 PM)
Table 5-14

Landfill 1 Groundwater Monitoring Data

February 2002 Sampling Event

BWX Technologies, Inc

Mt. Athos Site, Lynchburg, Virginia

(Page 5 of 5)

Sample Number FL-1DUP FL-1 FL-2 FL-3 FL-4

Date Sampled 02/15/02 02/15/02 02/15/02 02/15/02 02/15/02

MCL RBC

Compound μg/L μg/L μg/L μg/L μg/L μg/L μg/L

GROUNDWATER

Naphthalene N/A 6.5 < 10* < 10* < 10* < 2500* < 10*

Styrene 100 1600 < 10 < 10 < 10 < 2500* < 10

Tetrachloroethene 5 0.63 56.3 57.7 42.9 25400 < 10*

Toluene 1000 750 < 10 < 10 < 10 < 2500* < 10

Trichloroethene 5 0.026 21.8 22.1 4.1 278 < 10*

Trichlorofluoromethane N/A 1300 < 10 < 10 < 10 < 2500* < 10

Vinyl Acetate N/A 410 < 10 < 10 < 10 < 2500* < 10

Vinyl Chloride 2 0.015 < 10* < 10* < 10* < 2500* < 10*

cis-1,2-Dichloroethene 70 61 33.4 33.5 < 10 < 2500* < 10

cis-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 2500* < 10*

m,p-Xylenes N/A 12000 < 10 < 10 < 10 < 2500 < 10

n-Butylbenzene N/A 240 < 10 < 10 < 10 < 2500* < 10

n-Propylbenzene N/A 240 < 10 < 10 < 10 < 2500* < 10

o-Chlorotoluene N/A 120 < 10 < 10 < 10 < 2500* < 10

p-Chlorotoluene N/A N/A < 10 < 10 < 10 < 2500 < 10

p-Cymene N/A N/A < 10 < 10 < 10 < 2500 < 10

sec-Butylbenzene N/A 240 < 10 < 10 < 10 < 2500* < 10

sec-Dichloropropane N/A 0.16 < 10* < 10* < 10* < 2500* < 10*

tert-Butylbenzene N/A 240 < 10 < 10 < 10 < 2500* < 10

trans-1,2-Dichloroethene 100 120 < 10 < 10 < 10 < 2500* < 10

trans-1,3-Dichloropropene N/A 0.44 < 10* < 10* < 10* < 2500* < 10*

trans-1,4-Dichloro-2-Butene N/A 0.0013 < 10* < 10* < 10* < 2500* < 10*

Shading indicates result is greater than screening criteria (Use lesser value of MCL or RBC when screening).

* Maximum detected level is greater than screening criteria.

MCL - Maximum contaminant level.

μg/L - Micrograms per liter.

NA - Not available.

RBC - Risk-based concentration for tap water, U.S. Environmental Protection Agency, Region 3, October 2001.

KN6\BWXT\FEP\02 GWAR\Table 5-14 (LF-1 Feb 2002).xls(flq102gwcdh)\5/23/2006(4:28 PM)
KN6\BWXT\FEP\02 GWAR\GWAR rev 10.doc\5/23/06\4:09 PM

FIGURES 
KN6\BWXT\F

FIGURE 3-1 

SCHEMATIC OF WATER FLOW

CLOSED LOOP 

COOLING 

(0.391 MGD)

ONCE THROUGH 

COOLING 

(0.237 MGD) 

Framatome 

SANITARY ANP

USAGE

URANIUM 

PROCESSES 

PICKLING & 

MANUFACTURING 

OPERATIONS

URANIUM 

RECOVERY 

ROOF DRAINS 

GRIT 

BLASTING

JAMES RIVER 

(0.396 MGD)

WATER TREATMENT 

PLANT

RECYCLE 

RESERVOIR & 

STORAGE TANK 

MISC. PLANT 

CONSUMPTION

COOLING 

TOWER 

SCREEN 

EQUALIZATION 

AERATION 

CLARIFICATION 

CLARIFICATION 

UV DISINFECTION 

SPLITTER 

BOX B

D

ROOF & 

ALLEYWAY 

DRAINS

EQUALIZATION 

MICROFILTRATION 

MICROFILTRATION

NEUTRALIZATION NEUTRALIZATION

EQUALIZATION 

POND NO. 1 

EQUALIZATION 

POND NO. 2 OUTFALL 101 

0.031 MGD

OUTFALL 701 

0.161 MGD

FINAL OUTFALL 001

0.479 MGD

OUTFALL 005 

0.003 MGD AVG. 

 0.081 MGD PEAK

OUTFALL 004 

 0.020 MGD AVG. 

0.287 MGD PEAK

BRYANT’S POND 

(0.017 MGD AVG 

0.329 MGD PEAK)

0.391 MGD REC. LOOP

MAJOR STORM EVENTS ONLY (4.8 MGD PEAK)

SPRING 

WATER 

(0.05 MGD)

NON-RADIOACTIVE ROOF DRAINS

RADIOACTIVEROOF DRAINS

EMERG. OVERFLOW

MAJOR STORM EVENTS ONLY (0.050 MGD PEAK)

UNNAMED JAMES RIVER

DITCH LEADING 

TO JAMES RIVER

JAMES RIVER

DIFFUSER

ONCE THROUGH COOLING WATER (0.237 MGD)

SOLIDS

OVERFLOW

Notes: 1. All Flow Data is estimated 

December, 2000. 

2. All average and peak flows are 

cooling water overflow to Bry

instantaneous peak rate. 

3. MGD = Millions Gallons per D

EQUALIZATION EQUALIZATIONEQUALIZATION EQUALIZATION

TREATED GROUNDWATER FROM PUMP 

AND TREAT SYSTEM 

(.017 MGD) 

SETTLIN

CLARIFICA

BYPASS

OUTFALL 601 

0.286 MGD

BYPASS 

KN6\BWXT\FEP\02 GWAR\Fig 5-2.xls(Fig5-2)\5/23/2006(4:12 PM)

Figure 5-2

Fluoride Concentraiton in FEP-2 Effluent (Outfall 701)

BWX Technologies, Inc.

Mt. Athos Site, Lynchburg, Virginia

0.0

10.020.030.040.050.060.070.080.090.0

10/28/1995 3/11/1997 7/24/1998 12/6/1999 4/19/2001 

Date

701 Concentration (mg/l)