## SOIL SAMPLING AND GROUNDWATER INVESTIGATION WORK PLAN

AT & SF SUPERFUND 

## SITE 

## ALBUQUERQUE

## , NEW 

## MEXICO 

## AUGUST 

## 2006

Prepared for: 

## M C

## KENNA 

## LONG 

## & ALDRIDGE 

## LLP 1875 LAWRENCE 

## S TREET

## , SUITE 

## 200 DENVER

## , CO 80202-1847
Prepared by: 

## MFG, INC

## .

4900 Pearl East Circle, #300W Boulder, CO 80301

### TABLE OF CONTENTS

1.0 INTRODUCTION ............................................................................................................................1 2.0 SITE SETTING

............................................................................................................................... .2 3.0 PROPOSED SCOPE OF ADDITIONAL INVESTIGATION ........................................................3 3.1 Surface Soil Investigation ...................................................................................................4 3.2 Shallow Subsurface Investigation .......................................................................................5 3.3 Groundwater Investigation ..................................................................................................7 3.3.1 Groundwater Well Installation ...............................................................................8 3.3.2 Groundwater Monitoring ........................................................................................9 4.0 QUALITY ASSURANCE .............................................................................................................10 4.1 Field Quality Assurance/Quality Control ..........................................................................10 4.2 Laboratory Quality Assurance/Quality Control ................................................................10 4.3 Data Reporting ..................................................................................................................10 4.4 Data Evaluation .................................................................................................................11 4.4.1 Field Measurements .............................................................................................11 4.4.2 Laboratory Data....................................................................................................12 5.0 REPORTING

............................................................................................................................... ...13 6.0 REFERENCES

............................................................................................................................... 14
TABLES 1 Soil and Groundwater Sampling Requirements
FIGURES 1 Proposed Sampling Locations

APPENDICIES APPENDIX A – MFG Standard Operating Procedures

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### 1.0 INTRODUCTION This Work Plan describes the scope of additional site characterization activities proposed by GCC Premium Transloaders, LLC (GCC) at the AT&SF Albuquerque Superfund Site (the Site). This Work Plan has been developed, based on a review of available information regarding the Superfund Site, to establish a more complete understanding of environmental conditions within the portion of the Site, that is the subjectof a certain purchase and sale agreement. The Site is currently owned by the BNSF RailwayCompany and is located at 3300 Second Street, SW, in the South Valley area of the City of Albuquerque, Bernalillo County, New Mexico. It is the location of the former Atchison, Topeka, and Santa Fe Railway (AT & SF) Tie Treating Plant. The Site can be divided into two general areas; (1) the area at the southern portion of the property that housed the tie treating facility itself, the wastewater reservoir and sump, and the drip tracks; and (2) the northern portion of the property that was reported used only for the storage of ties, both treated and untreated. The southern, tie treatment plant area is enclosed by a fence that represents a demarcation between the two areas. The focus of the additional investigations described in this Work Plan is the western portion of the former tie storage area (the subject property); an L-shaped parcel approximately 20 acresin size, with the stem of the L in the northsouth direction bordered by the railroad track tothe west, by overflow parking for intermodal on the north, by the auto unloading facility to the east, and the old AT&SF tie treating facility to the south and east, as shown on Figure 1. The tie treating plant was dismantled in 1972 and no activitytook place at the site until 1982. In that year, portions of the property were leased to Bredero Price, Inc. who operated a pipe storage and coating facility for approximately one year. The pipe coating process involved the application of extruded plastic coating onto steel pipe (TRC, 2001). Based on a review of historical aerial photographs it appears that Bredero primarily utilized the tie storage area for its operations. To prepare the site for the pipe coating operation, TRC reported that plant demolition debris was consolidated in the southern portion of the site, in the area of the tie treatment facility.

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### 2.0 SITE SETTING As presented in the ROD, the Site and surrounding area’ s topography is generally flat and gently slopes to the west towards the Rio Grande River.The Rio Grande River,located approximately one mile west of the site, is the closest body of water. The site is located in the inner Rio Grande Valley, which is incised into the sedimentary basin fill of the Albuquerque basin. The sedimentary basin fill consists largely of the Santa Fe Formation with some overlying recent deposits represented by the Rio Grande Alluvium. The Santa Fe Formation has been divided into three parts (upper, middle, and lower) that are interconnected. The Santa Fe Formation is approximately 4,750 feet thick in the area. The upper Santa Fe Formation is estimated at 650 feet thick in the vicinity of the site and flows (regionally) in a northerly direction. This regional flow direction is likely influenced by groundwater withdrawal from the San Jose Municipal Well Field located about two miles north of the site. At the site, the Rio Grande Alluvium is 53 to 82 feet thick and consists of two water bearing zones; the S hallow Aquifer and the IntermediateAquifer. The shallow aquifer is comprised mainly of sand and extends from the ground surface to an average depth of approximately 20 feet. While this sand unit is referred to as the shallow aquifer, only the lower few feet are typically saturated. A discontinuous silty clay layer separates the shallow and intermediate aquifers. The intermediate aquifer is comprised mainly of sand and gravelly sand and has an average thickness of approximately 40 feet. There is a downward gradient between the shallow and intermediate aquifers and, based on groundwater levels observed at the site, the intermediate aquifer is typically fully saturated with water levels just slightly lower than the shallow aquifer wells. Groundwater flow direction at the Site is generally in the east-southeast direction.

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### 3.0 PROPOSED SCOPE OF ADDITIONAL INVESTIGATION The primary purpose of collecting additional environmental information is to provide a more robust characterization of the subject property to allow GCC the opportunity to more fully understand site conditions for use in determining and evaluating the risks associated with carrying through with the purchase of the property and to determine what, if any, contamination may be encountered during site development activities. Potential data gaps associated with the former Tie Storage Area, identified through a preliminary review of existing site information, include the absence of any characterization of the surface soils, the lack of groundwater wells on the property, and the potential for the existence of additional hot spots of creosote contamination. In addition, data collected through this investigation will be useful for establishing baseline environmental conditions, prior to the initiation of GCC activities, and to ensure the safety of future workers at the site. The scope of the proposed additional environmental investigation will consistof three types of sampling activity:

• 

### Collection of surface soil samples from the 0- to6-inch depth intervalto characterize the previously uncharacterized surface soil horizon;

• 

### A shallow subsurface investigation (0 to 5 -feet) focused in areas where subsurface construction is anticipated to determine whether additional hot spots of creosote contamination are present within the former Tie Storage Area; and

• 

### The sampling of groundwater to characterize groundwater conditions in the shallow and/or intermediate aquifer underlying the subject property. GCC is also proposing to conduct a geotechnical investigation of the site concurrent with the environmental investigation. It is anticipated that this investigation will consist of 10 to 12 soil borings advanced to depths ranging from 10 feet to up to or greater than 50 feet. In addition, samples may be collected from the shallow subsurface sampling locations for geotechnical testing to assist in the development of design criteria for surface roads, rail spurs, and shallow foundations. In general samples will be analyzed for constituents identified as contaminants of concern (COC) in Section 9.2 of the Record of Decision for the Site (EPA, 2002), or potential COCs as identified in the RI Report (TRC, 2001). Where deemednecessary to establish baseline conditions, to 3
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### evaluate potential risks, or to investigate potential sources of off-site contamination, other than from the tie treatment facility, additional constituents have been added. GCC also reserves the right to amend the list of analytes to be considered based on further review of existing site information or observations of site conditions during the investigation. Any proposed changes to the scope of the investigation, as described in this Work Plan, will be subject to review by BNSF. GCC does not intend to perform any investigation activities within 25 feet of the centerline of any active railroad track on the property and will conduct all activities in accordance with the conditions of the License for Environmental Access agreement entered into by both parties. It is our understanding that BNSF may desire to collect splits of the samples that are collected during this additional site investigation. GCC and its consultants and contractors will cooperate with BNSF to ensure the proper collection of representative split samples. All costs associated with the handling, shipment, and analysis of split samples shall be the responsibility of BNSF. All information and data collected from this investigation will be provided to BNSF prior to the release of any information to the EPA or the New Mexico Environmental Department (NMED).

3.1 Surface Soil Investigation No surface soil samples were collected from the tie storage area during the previous investigationsfor the following reasons (TRC,2001a); (1) there was no visible evidence of creosote impact on the ground surface, (2) it is believed that much of the soil at the facility is fill material and; (3) the top one to two feet of soil was disturbed by the pipe storage and coating operation. The surface soil sampling program will help tocharacterize the fill soil reportedly present over the tie storage area, establish baseline conditionsfor the subject property to evaluate potential impacts from the Bredero Price operations, and in determining if there are any contaminants present that would present a concern relative to the future industrial use of the property. A 100 foot by 100 foot sampling grid will be established across the entire subject property, as indicated on Figure 1. To conduct an unbiased screening level characterization of the surface soil, grid nodes will be numbered and 25% will be selected for sampling using a random-number
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### generator. Additional surface soil sample locations may also be identified within roadway easements through BNSF property in order to establish baseline conditions. Grab samples from the zero- to six-inch depth interval, or to the base of the fill material whichever is shallower, will be collected at eachselected grid node and analyzed for Benzene, Toluene, Ethylbenzene and Xylene (BTEX) by method 8021, Total Extractrable Petroleum Hydrocarbons (TEPH) Diesel Range by Method 8015, Polynuclear Aromatic Hydrocarbon (PAH) semi-volatile organic constituents (SVOCs)by Method 8270SIM, and the metals arsenic, lead, and zinc, by Method 6020. A more detailed explanation of procedures for collecting surface soil samples are provided in MFG’s SOP No. 9 – Soil and Sediment Sampling for Chemical Analysis, included in Appendix A.

3.2 Shallow Subsurface Investigation A limited shallow subsurface investigation of the former tie storage area was performed in 1994 and 1995 (TRC, 2001a). Soil samples were collected from 24 locations chosen from a grid layout. The approximate locations of this previous investigation are indicated on Figure 1 (taken from RI Figure 3-13). It is unclear how the grid was laid out, as it appears as though the actual boring locations are approximately 350 feet apart, northto south, and offset 200 feet east to west. In the documents reviewed, no specific rationale was found explaining the basis for selecting the grid spacing used to perform the investigation of the Tie Storage Area. To evaluate the adequacy of this spacing to identify hot spots at an acceptable error rate, an analysis was performed using a method consistent with EPA’s Methods for Evaluating the Attainment of Clean-Up Standards (EPA, 1989). This method is used to determine the grid spacing required to search for hot spots (of a designated size) so that the error rate is acceptable. The error rate is the probability that the presence of a hot spot will not be detected by the sampling plan.
For this exercise, an acceptable error rate of 10% was selected, meaning there will be a 10% chance of not detecting a hot spot that is actually present. The size of the hot spot selected is an area with a 50-foot diameter, which is consistent with the size of the areas where removal activities were performed by BNSF based on the results of the previous site investigation. Following the EPA’s methodology, a grid spacing of 90 feet would be required to detect hot spots of this size at an error rate of 10%. Following this same methodology, using a 200-foot grid spacing (the minimum spacing of the RI locations), and back calculating the error rate indicates
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### that there may be an 80% chance that a hot spot remains, even though it may not have been detected by the sampling. To more fully characterize the shallow subsurface soil in the tie storage area additional subsurface
sampling is proposed in a portion of the subject property identified by GCC as an area of interest, where subsurface construction is likely. A hollow-stem auger conventional drill rig or 'Geoprobe' direct push rig will be used to collect continuous subsurface samples from the surface todepths of approximately 5 feet below ground surface, at selected locations laid out on a 90 foot grid within the subject property. The proposed sampling locations for this investigation are presented on Figure 1 and are focused on areas where future construction activities are most likely to occur, based upon a preliminary facility layout provided by GCC. It is estimated that approximately 50 locations will be sampled by this method. Where possible, this shallow subsurface sampling will be conducted in conjunction with the drilling of soil borings advanced as part of the geotechnical site investigation. As indicated, grid locations falling near previously sampled areas will not be sampled again during this supplemental investigation, except for the vicinityof location CLF-13. Based on the results of the initial investigation, additional sampling and soil removal was performed at this location by BNSF. As the source or characteristics of the fill material used tobackfill the excavation following removal has not been determined, this area should also be sampled as part of the supplemental investigation. One to two samples will be collected at each location depending on general soil characteristics and visual screening for evidence of creosote. If visual or olfactory evidence of creosote contamination is observed, the first sample will be collected from the depth at which contamination appears to be greatest and a second sample will be collected where apparent clean soil is encountered, consistent with the first stage investigation performed under the RI. Absent any evidence of contamination, the first sample will be collected either from the first natural soil encountered below any fill material, reportedly at a depth of 3 inches to 2 feet, or from the top of any clay or silt layer, if one is encountered in the upper two feet of soil (identified as a potential barrier to the downward migration of creosoteconstituents). Following the completion of sampling, each soil boring will be backfilled with hydrated bentonite chips.

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### The field notes recorded during the previous shallow subsurface investigation identify the presence of "charcoal" at various depths, but this material was only sampled once. While the results from this one sample of "charcoal" material did not exceed the Preliminary Remediation Goals identified in the Soil Feasibility Study (TRC,2001b), samples of this material will also be collected, at each location where it is encountered, during the supplemental investigation. Four to six representative samples of this material will beselected for analysis following the completion of all sampling, provided that the material appears to be relatively homogeneous across the Site. The shallow borings and subsurface soil sample collection will beconducted in accordance with MFG SOPs No. 4 and No. 9, included in Appendix A. The shallow soil samples will be analyzed for SVOCs by Method 8270, and arsenic and zinc by Method 6020.

3.3 Groundwater Investigation Currently there is a lack of groundwater data specific to the subject property (the former Tie Storage Area). To address this data gap, several temporary monitoring wells will be installed in the shallow and/or intermediate aquifer, withinthe Rio Grande Alluvium. One monitoring well will be installed along the western boundary (upgradient boundary) of the property. This well will serve to establish background, or baseline conditions, and to evaluate if there are any impacts to groundwater from upgradient sources such as the former feed lot property located immediately west of 2nd

### Street. It is anticipated that this well will be installed in the intermediate aquifer. Additionally, wells will be installed at two locations along the eastern property boundary of the subject property, one in the southeast corner and onenear the northeast corner of the site. It is anticipated that two wells, one in the shallow aquifer and one into the intermediate aquifer will be installed at the southeast location. Data from the well(s) in the southeastern portion of the site would be evaluated to confirm the absence of groundwater contamination associated with the primary source areas identified for the Superfund Site. The monitoring well along the eastern boundary to the north (anticipated to be installed in the shallow aquifer) will be used to evaluate the presence of groundwater contamination and inconjunction with the other wells to monitor groundwater flow direction and quality in the future. The locations of the proposed monitoring wells are indicated on Figure 1.

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### 3.3.1 Groundwater Well Installation Prior to drilling, utilities will be located to ensure that each proposed monitoring well location is clear of known underground utilities. The groundwater monitoring wells will be installed to depths of approximately 20 to 60 feet below ground surface, depending onthe subsurface conditions encountered. A drill rig equipped with hollow stem augers (HSA) will be used to install the wells installed in the shallow aquifer and a casing advancing air rotary rig will be used, if necessary, to install the deeper wells into the intermediate aquifer. Each boring will be sampled and logged by an experienced geologist. When drilling through the clay aquitard into the intermediate aquifer,if contamination is observed by the geologist in samples or drill cuttings in the upper aquifer through either visual or olfactory evidence, drilling will be suspended and the well location will either be moved or the boring will be advanced after setting the outer casing and advancing an inner casing to prevent cross-contamination of the aquifers. If no contamination is observed in the upper aquifer zone, drilling may be advanced using either the hollow stem auger rig or the air rotary rig with a single casing. The final installation depth for each well will be determined at the time of construction based on observations of the sample cores and drill cuttings. Soil samples may be collected if evidence of contamination is observed during drilling. Each temporary well will be constructed of two-inch diameter, schedule 40 polyvinyl chloride (PVC). Ten feet of 0.010-inch screen will be used. Each well will be constructed with a two foot sediment trap below the screened interval. A filter pack consisting of 10/20 silica sand will be placed in the annular space from the bottom of the boring to three feet above the top of the screen. A three foot cap of hydrated bentonite pellets will be placed above the sand pack. The remainder of the annular space from the top of the bentonite seal to the surface will be filled with bentonite pellets and hydrated. After the temporary wells have been installed, they will be allowed to stand overnight before being developed. Each monitoring well will bedeveloped by purging at least five casing volumes. Procedures for the installation, development and sampling are provided in Appendix A, MFG SOPs, Numbers 2, 6, and 12. Following sampling the casing will be pulled and the wells will be abandoned in accordance with the above referenced SOPsand Well Abandonment regulations from the New Mexico State Engineer's Office.

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### Soil cuttings and purge water generated during the installation and development of the monitoring wells will be stored in drums. The contents of the drums will be characterized for disposal and then transported off-site to an appropriate disposal facility.

3.3.2 Groundwater Monitoring Prior to sampling, the static water level in the wellwill be measured, after which the monitoring well will be purged a minimum of three casing volumes using a dedicated bailer. Field pH, specific conductance, and temperature will be monitored and recorded during purging. Once three casing volumes have been purged and the field parameters (specific conductance, pH, and temperature) have stabilized within 10 percent, the samples will be collected. The samples will be field preserved as required by the analytical method and placed on ice inside a cooler for shipment to the analytical laboratory. Samplecontainer and preservative requirements are listed on Table 1. Chain of custody forms will be completed and shipped with the cooler. All water samples will be analyzed for dissolved nitrate/nitrite by Method 353.2, SVOCs by Method 8270, BTEX by Method 8021, and TEPH Diesel RangeHydrocarbons by Method 8015, and arsenic, lead, and zinc by Method 6020. MFG SOP’s for groundwater sampling, sample custody, packaging and shipment are included in Appendix A.

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### 4.0 QUALITY ASSURANCE MFG will ensure data quality through field and laboratoryquality assurance and quality control (QA/QC) procedures, data reporting and evaluation.

4.1 Field Quality Assurance/Quality Control The field quality assurance/quality control (QA/QC) program will include the collection of field duplicate samples and equipment blanks. Equipment blanks will be used to quantify artifacts introduced into the sample during collection. One equipment blank will be collected during each groundwater sampling event when decontaminated, non-dedicated sampling equipment is used. During soil sampling activities one equipment blank will be collected each day. The blank will be collected by pouring deionozed water over and/or through the decontaminated, non-dedicated equipment. The blank will be analyzed for the same suite of monitoring parameters as the associated water and soil samples. The concentration levels of any artifact found in the equipment blank will be noted and compared tothe associated water and soil sample results. One field duplicate sample will be collected during each groundwater sampling event. The duplicate sample will be analyzed for the same suite of monitoring parameters as the original sample. The duplicate sample will be collected from the bailer in successive aliquots alternating with collection of the original sample. The duplicate sample will be submitted as a blind sample to the laboratory. No duplicate samples will be collected during the soil sampling activities.

4.2 Laboratory Quality Assurance/Quality Control The laboratory selected to analyze the soil and water samples will operate under an internal quality assurance plan. Laboratory quality control (QC) will include method blanks, analytical duplicates, matrix spikes, matrix spike duplicates, calibration checks, and laboratory control standards, as required by the referenced analytical method.

4.3 Data Reporting The analytical reports submitted under this monitoring plan will include, at a minimum, the following information:

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### • A copy of the chain of custody form, including the date of sample receipt and sample temperatures upon receipt;

• Field and laboratory sample identification numbers;

• Sampling date and time;

• Sample storage conditions and verification of preservation conditions (if appropriate);

• Sample preparation methods;

• Date and time of analysis;

• Analytical method;

• Analytical result for each parameter requested, including results from QA/QC samples;

• Unit of measurement;

• Method detection limit (in units of sample results);

• Laboratory quantification or reporting limit (defined);

• Calibration results;

• Certified concentrations for standa rd reference materials, if used;

• Method blank results;

• Results of laboratoryQC analyses [laboratory control sample/laboratory control sample duplicate (LCS/LCSD); matrix spike/matrix pike duplicate samples (MS/MSD); analytical duplicate, etc.] associated with each batch of samples analyzed, as appropriate to the method protocol;

• Definition/explanation of any internal data qualifiers applied, and;

• A brief narrative describing sample analy ses including description of any problems or unusual circumstances during analysis.

4.4 Data Evaluation All data will be handled according to the following procedures to ensure that onlydata of appropriate quality are used to evaluate site conditions.

4.4.1 Field Measurements Field measurements including pH and specific conductance, will be collected during groundwater sampling activities. The field data will be reviewed in an attempt to identify any transcriptional or computational errors. Any anomalous data will be discussed with the field personnel that originated the data, and corrective actions will be initiated as appropriate.

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### 4.4.2 Laboratory Data Laboratory calculations and data review will be performed bythe laboratory in accordance with the procedures described by the analytical method. The laboratory will review the results of the laboratory QC analyses, instrument calibration, and maintenance records, calculations, and the chain of custody record (including sample holding times) within the laboratory. The laboratory shall prepare a narrative to summarize the findings of their review, especially any problems identified, to be included with the results of all the sample analyses. After receipt of the data from the laboratory, the f ollowing data handling procedures will be used:

• Data evaluation will be performed to ensure that the analytical laboratory was operating in control at the time the samples were analyzed and to document that appropriate methods and holding times were observed.

• Data evaluation will be performed to assess whether the data are suitable to meet project objectives. The analytical results will be compared againstPreliminary Remediation Goals (PRGs) established for the Superfund Site, and identified in the ROD (EPA, 2002) for the constituents analyzed or against published risk based contaminant levels published by the US EPA or State of New Mexico for industrial use areas.

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### 5.0 REPORTING The findings of the surface soil sampling, shallow soil sampling and groundwater investigation will be summarized in a report and provided to GCC. This report will provide a summary of the investigation activities performed, identify any modifications to the scope or procedures outlined in this Work Plan, and present an evaluation of the analytical results relative to the site-specific PRGs or relevant industrial use standards for the constituents of concern.

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### 6.0 REFERENCES TRC Environmental Corporation (TRC). 2001a. Remedial Investigation Report for the Former Tie Treating Facility, Final Report, Volume 1 . Prepared for the Burlington Northern and Santa Fe Railway Company. July. TRC Environmental Corporation (TRC). 2001b. Soil Feasibility Study for the Former ATSF Tie Treating Facility, Albuquerque, New Mexico . Prepared for the Burlington Northern and Santa Fe Railway Company. July. United States Environmental Protection Agency (EPA). 2002. Record of Decision AT&SF Albuquerque Superfund Site, Albuquerque, New Mexico . June.

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### TABLESTable 1Soil and Groundwater Sampling RequirementsAT SF Superfund SiteAlbuquerque, New MexicoConstituentAnalytical MethodSampleContainerPreservative Holding TimesSurface Sampling (25 Locations)Metals (Arsenic, Lead, & Zinc) Method 6020 2 oz glass jarnone14 daysBTEXMethod 8021 4 oz glass jarnone14 daysTEPH - Diesel RangeMethod 8015 4 oz glass jarnone14 daysPAH'sMethod 8270 SIM 2 oz glass jarnone14 daysShallow Subsurface Sampling (50 Locations, up to 2 samples per location)Metals (Arsenic & Zinc)Method 6020 2 oz glass jarnone14 daysSVOCsMethod 8270 4 oz glass jarnone14 daysGroundwater Sampling (3 monitoring wells, 1 duplicate sample)ArsenicMethod 6020 250 mil plastic filtered, pH<2 (HNO3) 6 monthsDissolved Nitrate/Nitrite as N Method 353.2 250 mil plastic filtered, pH<2 (H2SO4) 28 daysBTEXMethod 8021 40 mil VOA (2) pH<2 (HCL)14 daysTEPH - Diesel RangeMethod 8015 1 liter ambernone7 daysSVOCMethod 8270 1 liter ambernone7 daysNotes:All samples will be placed in chilled coolers immediately after sample collection.J:\BLD01\010216\Addl Investigation\Table1_061506.xlsPage 1

### FIGURES

## Tie Treatment Facility 390 ft ~ 1200 ft 1750 ft

CLF-24 CLF-22 CLF-13

MW-5c MW-5B MW-5A

MW-4A

MW-1A MW-1B

MW-2B MW-2A MW-7B MW-7C

MW-BA MW-6B MW-3A MW-6B MW-17b MW-17a

MW-21a MW-21b

MW-18b MW-18a

MW-13B MW-13A MW-10B MW-10A MW-24B
MW-27C MW-23B MW-15b MW-20b MW-20a MW-26C MW-19B
MW-25C MW-22B MW-29CL MW-29CU

MW-28CU MW-28CL

MW-BA(R) 04-AUG-2006 N:\ARCPRJ2\010216\MXD\SAMPLEGRIDS.MXD

PROJECT: 01-0216 DATE: AUG 04, 2006 BY: CRL REV: 0 CHECKED: DLL 

### 0 300 600
Feet 

## GCC RIO GRANDE, INC.
FIGURE 1 

### AT & SF SUPERFUND SITE 

## PROPOSED SAMPLING LOCATIONS

consulti ng sci enti st

s and engineers 

### M FG,I nc. 

## Legend Railroad Car Unloading Facility Approximate AT&SF Site Boundary Subject Property Surface soil sampling grid (100 ft spacing; Sample 25% of nodes) Roads_Proposed Potential Shallow subsurface soil sampling location (90 ft Sample Grid) Previous shallow borehole location Borehole location where remediation was performed Proposed monitoring well location Existing Groundwater Monitoring Well Aerial Photography: March 27, 2003

### APPENDIX A

MFG Standard Operating ProceduresMFGSOPNo.2 Rev. No. I Date: August 2000 Page I of7 MFG, Inc. STANDARD OPERATING PROCEDURE No.2 SAMPLE CUSTODY, PACKAGING AND SHIPMENT

1.0 SCOPE AND APPLICABILITY

This Standard Operating Procedure (SOP) describes the protocol to be followed for sample custody, packaging and shipment. The procedures presented herein are intended to be general in nature. If warranted, appropriate revisions may be made when approved in writing by the MFG Project Manager. This SOP applies to any liquid or solid sample that is being transported by the sampler, a courier
or an overnight delivery service.

2.0 PROCEDURES

The objectives of this packaging and shipping SOP are: to minimize the potential for sample breakage, leakage or cross contamination; to provide for preservation at the proper temperature; and to provide a clear record of sample custody from collection to analysis.

2.1 Packaging Materials The following is a list of materials that will be needed to facilitate proper sample packaging: X Chain-of-Custody Record forms (see Figure SOP-2-1); X Coolers (insulated ice chests) or other shipping containers as appropriate to sample type; X Transparent packaging tape; X Zip-lock type bags (note: this is used as a generic bag type, not a specific brand name);
MFG,lnc.MFGSOPNo.2 Rev. No. I Date: August 2000 Page 2 of7

X Protective wrapping and packaging material;
X Contained ice (packaged and sealed to prevent leakage when melted) or "Blue lee"; and
X Chain-of-Custody seals.

2.2 Sample Custody from Field Collection to Laboratory

After samples have been collected, they will be maintained under chain-of-custody procedures. These procedures are used to document the transfer of custody of the samples from the field to the designated analytical laboratory. The same chain-of-custody procedures will be used for the transfer of samples from one laboratory to another, if required.

The field sampling personnel will complete a Chain-of-Custody Record and Request for Analysis form (CCIRA form, Figure SOP-2-1) for each separate container of samples to be shipped or delivered to the laboratory for chemical or physical (geotechnical) analysis. Information contained on the triplicate, carbonless form will include:
I. Project identification; 2. Date and time of sampling; 3. Sample identification; 4. Sample matrix type; 

### 5. Sample preservation methodes); 

### 6. Number and types of sample containers; 

### 7. Sample hazards (if any); 8. Requested analysis( es); 9. Requested sample turnaround time; 10. Method of shipment; II. Carrier/waybill number (if any); MFG, Inc.MFG SOP NO.2 Rev. No. I Date: August 2000 Page 3 of?

12. Signature of sampling personnel; 13. Name ofMFG Project Manager; 14. Signature, name and company of the person relinquishing and the person receiving the samples when custody is being transferred; 15. Date and time of sample custody transfer; and 16. Condition of samples upon receipt by laboratory.
The sample collector will cross out any blank space on the CCiRA form below the last sample number listed on the part of the form where samples are listed. The samples will be carefully packaged into shipping containers/ice chests.

The sampling personnel whose signature appears on the CCiRA form is responsible for the custody of a sample from time of sample collection until the custody of the sample is transferred to a designated laboratory, a courier, or to another MFG employee for the purpose of transporting a sample to the designated laboratory. A sample is considered to be in their custody when the custodian: (I) has direct possession of it; (2) has plain view of it; or (3) has securely locked it in a restricted access area. Custody is transferred when both parties to the transfer complete the portion of the CCiRA form under "Relinquished by" and "Received by." Signatures, printed names, company names, and date and time of custody transfer are required. Upon transfer of custody, the MFG sampling personnel who relinquished the samples will retain the third sheet (pink copy) of the CCiRA form. When the samples are shipped by a common carrier, a Bill of Lading supplied by the carrier will be used to document the sample custody, and its identification number will be entered on the CCiRA 

### form, Receipts of Bills of Lading will be retained as part of the permanent documentation in the MFG project file.

MFG, Inc.MFG SOP No. 2 Rev. No. I Date: August 2000 Page 4 of7 2.3 Sample Custody Within Laboratory

The designated laboratory will assume sample custody upon receipt of the samples and CCiRA form. Sample custody within the analytical laboratory will be the responsibility of designated laboratory personnel. The laboratory will document the transfer of sample custody and receipt by the laboratory by signing the correct portion of the CCiRA form. Upon receipt, the laboratory sample custodian will note the condition of the samples, by checking the following items:
1. Agreement of the number, identification and description of samples received by comparison with the information on the CCfRA form; and 2. Condition of samples (no air bubbles in VOA containers; any bottle breakage; leakage, cooler temperatnre, etc.). If any problems are discovered, tbe laboratory sample custodian will note this information on the "Laboratory Comments/Condition of Samples" section of the CC/RA form, and will notify the MFG sampling personnel or Project Manager immediately. The MFG Project Manager will decide on the final disposition of the problem samples.

The laboratory will retain the second sheet (yellow copy) of the CCiRA form and return the first sheet (white original) to MFG with the final laboratory report of analytical results. The original of the CCfRA form will be retained as part of the permanent documentation in the MFG project file.

A record of the history of the sample within the laboratory containing sample statns and storage location information will be maintained in a logbook, or a computer sample tracking system, at the laboratory. The following information will be recorded for every sample access event:
1. Sample identification; 2. Place of storage; 3. Date(s) and time(s) of sample removal and return to storage; 4. Accessor's name and title; 5. Reason for access; and

MFG, Inc.MFGSOP No.2 Rev. No. I Date: August 2000 Page 5 of? 6. Comments/observations (if any).

The laboratory will provide MFG with a copy of the logbook or computer file information pertaining to a sample upon request.

2.4 Sample Custody During Inter-Laboratory Transfer
If samples must be transferred from one laboratory to another, the same sample custody procedures discussed above will be followed. The designated laboratory person (sample custodian) will complete a CCIRA Record (MFG form or similar) and sign as the originator. The laboratory relinquishing the sample custody will retain a copy of the completed form. The laboratory receiving sample custody will sign the form, indicating transfer of custody, retain a copy, and return the original record to MFG with the final laboratory report of analytical results. The CCIRA Record will be retained as part of the permanent documentation in the MFG project file.

2.5 Packaging and Shipping Procedure

Be sure that all sample containers are properly labeled and all samples have been logged on the Chain-of-Custody Request for Analysis form (CClRA, SOP-2-1) in accordance with the procedures explained above and in the MFG SOPs entitled WATER QUALiTY SAMPLiNG and SOIUSEDIMENT SAMPLiNG FOR CHEMICAL ANAL YSIS.
All samples should be packed in the cooler so as to minimize the possibility of breakage, crosscontamination and leakage. Before placing the sample containers into the cooler, be sure to check all sample bottle caps and tighten if necessary. Bottles made of breakable material (e.g., glass) should also be wrapped in protective material (e.g., bubble wrap. plastic gridding, or foam) prior to placement in the cooler. Place each bottle or soil liner into two zip-lock bags to protect from cross-contamination and to keep the sample labels dry. Place the sample containers upright in the cooler. Avoid stacking glass sample bottles directly on top of each other.

MFG,Inc.MFG SOP No. 2 Rev. No. I Date: August 2000 Page 6 of? If required by the method, samples should be preserved to 4°C prior to the analysis. Water ice or "blue ice" will be used to keep the sample temperatures at 4°C. The ice will be placed in two ziplock bags ifthe samples are to be transported by someone other than the MFG sampler (e.g., a courier or overnight delivery service). Place the zip-lock bags of ice in between and on top of the sample containers so as to maximize the contact between the containers and the bagged ice. If the MFG sampler is transporting the samples to the laboratory shortly after sample collection, the water ice may be poured over and between the sample bottles in the cooler.

If there is any remaining space at the top of the cooler, packing material (e.g., styrofoam pellets or bubble wrap) should be placed to fill the balance of the cooler. After filling the cooler, close the top and shake the cooler to verify that the contents are secure. Add additional packaging material if necessary. When transport to the laboratory by the MFG sampler is not feasible, sample shipment should
occur via courier or overnight express shipping service that guarantees shipment tracking and next morning delivery (e.g., Federal Express Priority Overnight). In this case, place the chain-ofcustody records in a zip-lock bag and place the bag on top of the contents within the cooler. Tape the cooler shut with packaging tape. Packaging tape should completely encircle the cooler, and a chain-of-custody seal should be signed and placed across the packaging tape, and across at least
one of the opening points of the container. Retain copies of all shipment records provided by the courier or overnight delivery service and maintain in the project's file.

2.6 Documentation and Records Management Daily Field Records or a field notebook with field notes will be kept describing the packaging procedures and the method of shipments. Copies of all shipping records and chain-of-custody records will be retained in the project files.

MFG, Inc.MFGSOPNo.2 Rev. No. I Date: August 2000 Page 70f7 3.0 QUALITY ASSURANCE

The Project Manager or designated QA reviewer will check and verify that documentation has been completed and filed per this procedure.

MFG, Inc.MFG SOP No. 4 Rev. NO.1 Date: August 2000 Page I of7 MFG, Inc. STANDARD OPERATING PROCEDURE No.4 SUPERVISION OF EXPLORATORY BORINGS

1.0 SCOPE AND APPLICABILITY

This Standard Operating Procedure (SOP) describes the protocol to be followed duriug the drilling and logging of exploratory borings by MFG. Exploratory borings (pilot holes) may be drilled to obtain samples of the subsurface strata or to run borehole geophysical logs. Borings will be either backfilled with grout or completed as monitoring wells or piezometers.

The procedures presented herein are intended to be general in nature. As site-specific conditions become known, appropriate modifications to the procedures may be made when approved in writing by the MFG Project Manager.

2.0 PROCEDURES

2.1 Drilling
For any site or drilling location, the selection of drilling methods will be based on: (I) availability and cost of the method; (2) suitability for the type of geologic materials at the site (e.g., consolidated, unconsolidated); and (3) potential effects on sample integrity (influence by drilling fluids and potential for cross contamination between aquifers). Some commonly used drilling methods include hollow-stem auger method, cone penetrometer testing (CPT) method, direct-push geoprobe method, hydraulic rotary method, cable tool method, or casing-hammer air rotary method. Synthetic polymer drilling fluid additive should be used only if a boring: (I) will not be sampled for chemical analysis; (2) will not be completed as a monitoring well; or (3) if cuttings return and/or borehole integrity cannot be achieved by any other method.

MFG, Inc.MFG SOP No. 4 Rev. NO.1 Date: August 2000 Page 2 on Exploratory borings for monitoring wells and piezometers will be drilled in a manner that will minimize the potential for cross contamination between aquifers. The actual depth of each exploratory boring will be specified by the MFG field geologist assigned to the drill rig and will be based on the intended use of the boring. No solvents or petroleum-based products will be used for lubricating any drilling equipment (rods, bit, augers, mud pit, etc.) which will contact the borehole or the drilling fluid. For air rotary drilling, an air filter will be installed between the air compressor and the drill pipe to intercept oil droplets.

The drilling equipment in which fluid (including air) circulates, including drive samplers and bits, will be thoroughly steam cleaned before and after drilling of each exploratory boring. Only clean, potable water from a municipal supply will be used as makeup water for drilling fluid and for decontamination of drilling equipment. An acid rinse (e.g., 0.1 N Hel) or solvent rinse (e.g., methanol or hexane) may be used to supplement these procedures if tarry or oily deposits are encountered during drilling. Drilling equipment cleaned in this manner will be thoroughly steam cleaned prior to reuse or leaving the site.

To ensure that the specified equipment has been provided by the drilling contractor, prior to drilling the MFG field geologist will measure and record the outside diameter of the drill bit or augers and, when using the hollow stem auger method, the inside diameter of the augers. During drilling, the MFG field geologist may choose to periodically measure and record the depth to water within the drill casing. The position of the lead drill casing will be recorded each time a water level measurement is taken. When the total depth of a boring is reached, the water level within the drill casing will be measured.

If the boring is to be completed as a monitoring well or a piezometer, the final borehole diameter will be sufficiently large to allow placement of a specified type and size of well casing, screen and filter pack. The MFG field geologist will measure and record the total depth ofthe final borehole at the completion of drilling.

MFG, Inc.MFG SOP No. 4 Rev. No. I Date: August 2000 Page 3 of7 The MFG field geologist shall specify to the driller the penetration rate, depth of soil sample collection, method of sample retrieval, and any other matters which pertain to the satisfactory completion of the exploratory borings.
Soil cuttings and drilling fluid generated during drilling should be temporarily stored in steel dnnns or other approved containers. Final disposal of the soil cuttings and drilling fluid will be conducted in accordance with all legal requirements and with procedures discussed in the MFG SOP entitled STORAGE AND DISPOSAL OF SOIL, DRILLING FLUIDS, AND WATER GENERATED DURING FIELD WORK.

2.2 Sampling and Logging
Representative samples of cores and/or drill cuttings may be obtained and evaluated. A detailed lithologic log of these samples should be made.
Selected samples may be retained for further physical analysis. Soil samples may also be obtained for chemical analysis. Sample collection and preservation for chemical analysis will be in accordance with the MFG SOP entitled SOIL/SEDIMENT SAMPLING FOR CHEMICAL ANALYSIS. Selected samples that illustrate specific geologic features may be retained and shall be labeled with boring number and appropriate sample interval.

2.2.1 Obtaining Samples
When samples are collected, they should be obtained by one or both of the following methods described below.
A. Coring -- Cores will be collected from selected intervals of the exploratory borings. Core barrels, Pitcher tubes, modified California drive samplers or other split-spoon drive samplers will be used to obtain the soil cores. The MFG field geologist will carefully record on a boring log information which applies to the coring, such as rate of penetration, coring smoothness, core recovery, intervals of core loss, zones oflost

MFG, Inc.MFG SOP No.4 Rev. No. I Date: August 2000 Page 

### 4 of7 circulation of drilling fluid, hammer weight, drop length and blow counts, as appropriate to the drilling method. Cores may be retained for future examination and/or preserved for chemical or geotechnical analysis. If they are retained, the cores will be stored and labeled to show project, boring number, date, and cored interval. B. Collecting Cuttings

-- The MFG field geologist may collect cuttings from the drilling return fluid, airreturn from a cyclone separator, or the auger blade for every five-foot (or more frequent) increment of the exploratory boreholes. Sampling and logging should be performed 

### in accordance with the following procedures (Note: Items 2 through 6 do not apply to drilling methods that do not use a drilling fluid, e.g., hollow stem auger, push point sampler, etc.): 1. The height of the drilling table above ground surface, lengths of the drill bit, sub and drill collars, and length of drill rods or augers should be taken into account in calculating the depth of penetration. 2. A small-diameter, fine-mesh hand screen or a shovel may be used to obtain a sample of the cuttings from the boring by holding the sampling device directly in the flow of the drilling return fluid or cyclone separator. 3. A sample will be obtained from the drilling return fluid or cyclone separator by leaving the sampling device in place only for the brief period required to collect an adequate sampling volume. 4. The most representative cuttings samples are usually obtained whenever the driller stops advancing the hole and circulates drilling fluid or air prior to adding another joint of drill rod. 5. Keep in mind that the deeper the hole, the longer cuttings at the drill bit take to reach the surface. The travel time for cuttings to reach the surface may be estimated each time the driller adds a new length of drill rod by timing the first arrival of cuttings after fluid or air circulation is resumed. This travel time should be used along with the depth of penetration to estimate the start and finish of each sampling interval. 

### 6. In hydranlic rotary drilling, carefully wash the cutting sample in a bucket offresh water by slowly shaking the screen while the sample is submerged, to wash away the drilling fluid. 7. For all drilling methods, place the cutting samples on a sampling table, labeled in consecutive order. If the sample is to be retained, place the sample in a plastic or cloth sample bag labeled with the boring number and sample interval. The retained samples will later be used during preparation of a detailed lithologic log.

MFG, Inc.MFGSOP No.4 Rev. No. I Date: August 2000 Page 5 on 2.3 Logging of Boreholes
The drill-rig operator and the MFG field geologist should discuss significant changes in material penetrated by the drill bit, changes in drilling conditions, hydraulic pressure, drilling action, and drilling fluid circulation rate. The MFG field geologist will be present during drilling of exploratory borings and will observe and record such changes by time and depth. When using a drilling method that does not involve the use of a wet drilling fluid, the MFG field geologist will evaluate the relative moisture content of the samples and note zones that produce water. The MFG field geologist will record such field notes to use later in preparing a detailed lithologic log.
Core samples and selected cuttings that are collected and retained during the drilling of the exploratory borings shall be examined to evaluate the lithologic properties. A detailed lithologic log for the exploratory borings shall be completed using MFG's Log of Boring by Cuttings (Figure SOP-4-1) or Field Log of Borehole by Coring (Figure SOP-4-2). The lithologic description of the log should include soil or rock type, color, grain size, texture, hardness, degree of induration, calcareous content, indications of contamination, and other pertinent information. Color should be described using the Munsell Color Chart. Soil type should be described using the Unified Soil Classification System. When the Field Log of Borehole by Coring form is used, it shall include the method of sample collection (coring, cuttings) and the sample collection interval (Figure SOP-4-2), if any samples are collected.

2.4 Geophysical Logs

The MFG SOP entitled GEOPHYSICAL LOGGING discusses in detail the steps to be followed when performing geophysical logs of exploratory borings. Geophysical logging will be performed generally in uncased, fluid-filled boreholes. Following completion of the drilling, spontaneous potential, single-point resistance, lateral resistivity, natural gamma or other logs may be made for each exploratory boring immediately after the drilling fluid has been circulated to remove all of the cuttings. When performed, geophysical logging shall be done as quickly and efficiently as possible, while the wall of the borehole is in good condition, to minimize the

MFG, Inc.MFG SOP No. 4 Rev. No. I Date: August 2000 Page 6 of? possibility of trapping or entangling the downhole probes. Instruments on the logging unit should be adjusted to give the maximum definition of strata boundaries.

2.5 Sealing and Abandonment
For borings (pilot holes) not used to install a monitoring well andlor piezometer, the exploratory borings will be abandoned by sealing the hole with cement grout or other approved sealing agents. The MFG field geologist shall inspect the grout for adequate mixing prior to placement in the borehole.

If the borehole is dry and is less than 10-feet deep, the grout or other approved sealant may be poured slowly from the ground surface into the borehole. The grout should be added in one continuous pour before its initial set. If the borehole is greater than lO-feet deep, or if more than 2-feet of water is present in the borehole, the grout should be placed in one continuous pour by pumping through a tremie hose or pipe. The tremie hose or pipe initially shall be placed near the bottom of the bore hole and shall remain submerged in the grout during the entire grouting operation. Grout will continue to be pumped until return of fresh grout (uncontaminated by drilling fluid) is witnessed at the ground surface.

The preferred grout mix is one (1) sack of Type I-II Portland cement, five (5) percent by weight of powdered bentonite, per 8.5 gallons of water. Ifa high-yield bentonite grout (trade names Quik-Gel, Super Gel X, etc.) is used, the powdered bentonite percentage should be reduced to two (2) percent. The grout mixture may be modified to meet local regulations or site-specific conditions or specifications.

2.6 Docnmentation and Records Management
Field notes recorded by the MFG field geologist during the drilling of each exploratory boring shall be transferred to the log forrns (Figures SOP-4-1 and SOP-4-2). The original logs shall be sent to the MFG office and placed in the MFG project file. A copy of the logs will be retained in

MFG, Inc.MFG SOP No. 4 Rev. No. I Date: August 2000 Page 7 on the field file for the project. For preparation of the report, data from the field boring logs may also be transferred to another format.

3.0 QUALITY ASSURANCE

Field notes and field forms completed by the field geologist shall be reviewed by the field supervisor and the MFG Project Manager or other designated QA officer before they are placed into project files. Deviation from this SOP or a project-specific work plan shall be identified and described in field notes. The QA review will be recorded on the reviewed originals by initials of reviewer and date.

MFG, Inc.MFG SOP No. 6 Rev. No. I Date: August 2000 Page I of7 MFG, Inc. STANDARD OPERATING PROCEDURE No.6 INST ALLA TION OF MONITORING WELLS AND PIEZOMETERS

1.0 SCOPE AND APPLICABILITY

This Standard Operating Procedure (SOP) describes the protocol to be followed during installation of monitoring wells and piezometers by MFG, Inc. The procedures presented herein are intended to be general in nature. As site-specific conditions become known, appropriate modifications of the procedures may be made when approved in writing by the MFG Project Manager.

2.0 PROCEDURES

2.I Monitoring Well Installation
Each monitoring well will be designed to register the potentiometric surface and to permit water sampling of a specific depth zone encountered beneath the drill site. Separate monitoring wells may be completed, as necessary, in the different water-yielding zones underlying the site. The MFG field geologist, in consultation with the MFG Project Manager, will specify the exact depths of screened intervals using the lithologic log and geophysical log (ifperfonned) for control. Drilling and logging of the exploratory borings for the monitoring wells will be conducted in accordance with the MFG SOP entitled SUPERVISION OF EXPLORATORY BORINGS. Construction and completion of all monitoring wells will be in general conformance with the following procedures. Specific monitoring well completion requirements may vary in accordance with project-specific work plans and/or local regulatory agency guidance.

MFG, Inc.MFG SOP No. 6 Rev. No.1 Date: August 2000 Page 2 of7 2.1.1 Screens and Riser Casing
The monitoring well assembly shall consist of flush joint, threaded casing composed of mild steel, stainless steel or polyvinyl chloride (PVC) Schedule 40 (minimum). The threaded joints will have O-ring seals. Steel casing joints may be welded rather than threaded. The inside diameter of both the perforated and unperforated casing will be sufficiently large to permit easy passage of an appropriate water-level probe, equipment for development and purging of wells, and for collection of groundwater samples.

The perforated casing (well screen) will be factory slotted. The perforations will be compatible in size with the selected filter material. These perforated casing sections are generally not intended to provide optimum flow but only to provide hydraulic connection between the pervious material in the water-yielding zone and the monitoring well.

Prior to well construction, the MFG field geologist will inspect the blank and perforated casing delivered to the job site to verify that it meets the project specifications.

When the total depth of a boring has been reached, and prior to installation of the well casing, the MFG field geologist will measure and record the depth to water in the borehole.
Upon completion of drilling 

### andlor geophysical logging, the monitoring well casing and screen will be assembled and lowered to the bottom of the boring. The monitoring well assembly will be designed so that the well screen is approximately adjacent to the water-yielding zone that is to be monitored. The bottom of the screen will be approximately flush with the bottom of the well and will be closed with a threaded PVC cap or plug, or a slip cap secured with stainless steel screws. No PVC cement or other solvents are permitted to be used to fasten the joints of the casing or
screen. Centralizers spaced at the top and bottom of the screened interval and not more than 40 feet apart along the casing may be used to center the well assembly in the borehole, unless the boring is drilled by a low annular space method and the well is installed with the drill casing in place. Wells installed prior to pulling low annular space drill casing will be centered by the inside walls of the drill casing.

MFG, Inc.MFGSOPNo.6 Rev. No. I Date: August 2000 Page 3 of7 Ifwell casing assembly is being performed by a drilling subcontractor, the MFG field geologist will observe and inspect the assembly, insuring that the bottom cap is threaded or secured with stainless steel screws, Osrings are properly placed in the joints, the joints are completely tightened, and the blank and perforated intervals are constructed as specified. The MFG field geologist will measure the location of the top and bottom of the perforated interval by measuring the distances from the joint above the perforated interval to the top slot and from the base of the bottom cap to the bottom slot.
When using the mud rotary drilling technique, after the monitoring well assembly has been lowered to the specified depth, clean water may be circulated downward through the well casing and upward through the annular space between the borehole wall and the monitoring well casing. Circulation will continue until the suspended sediment in the return fluid has been thinned.

If the well is greater than 50 feet deep, the casing assembly will be held under tension prior to and during emplacement of the filter pack and seal.

2.1.2 Filter Material

Filter material will be a well-graded, clean sand with less than 2 percent by weight passing a No. 200 sieve and less than 5 percent by weight of calcareous material.
Filter sand will be tremied into the annular space using a one-inch diameter (or larger) pipe, in a calculated quantity sufficient to fill the annular space to a level of about two feet above the top of the perforated casing. The required height of the filter pack above the top of the perforated casing may vary by jurisdiction. The depth to the top of the filter pack must be verified by measuring, using the tremie pipe or a weighted steel tape. When use of a tremie pipe is not feasible, the filter sand may be poured slowly between the well casing and the inside walls of the auger, and the drill casing may be removed in stages.

MFG, Inc.MFG SOP No.6 Rev. No. I Date: August 2000 Page 4 of7 2.1.3 Seal
Once the depth to the top of the filter pack has been verified, a layer of bentonite pellets will be emplaced by pouring the pellets into the annular space in a calculated quantity sufficient to fill the annular space to a level at least one foot above the top ofthe filter pack. The depth to the top of the bentonite pellets layer must be verified by measuring, using the tremie pipe or a weighted steel tape. When the bentonite pellets are placed above the zone of saturation, they will be hydrated, after they have been emplaced, by adding clean, potable municipal water. Approximately 3 gallons of water should be added for every foot ofbentonite pellets. More water may be required when completing a well in relatively permeable material. The bentonite pellets will be hydrated in lifts no greater than 3 feet.

A bentonite/cement grout seal or other approved sealant will be emplaced above the bentonite pellet layer after it has been allowed to hydrate for a minimum ofY, hour. If the depth to the top of the bentonite pellet layer is dry and is less than 10 feet deep, the grout may be poured slowly from the ground surface into the annular space. The grout should be added in one continuous pour before its initial set. If the depth is greater than 10 feet deep, or if more than two feet of water is present in the annular space, the grout should be placed in one continuous pour by pumping through a tremie hose or pipe. The tremie hose or pipe initially shall be placed near the top of the bentonite seal and shall remain submerged in the grout during the entire grouting operation. When constructing a well or piezometer inside a low annular space drill casing, the drill casing may be used as a tremie pipe by pouring the grout down the annular space between the well casing and the inner wall ofthe drill casing. Grout will continue to be pumped until return of fresh grout is witnessed at the ground surface.

The bentonite/cement grout mix should be one (I) sack of Type I-II Portland cement, five (5) percent by weight (of cement) of powdered bentonite, per 8.5 gallons of water. If a high-yield bentonite (trade names Quik-Gel, Super Gel X, etc.) is used, the powdered bentonite percentage should be reduced to two (2) percent. An alternative grout mixture may be used if approved by the applicable regulatory agency and the MFG Project Manager. Only clean water from a municipal supply will be used to prepare the grout. The grout seal will extend from the top ofthe

MFG, Inc.MFG SOP No. 6 Rev. No. I Date: August 2000 Page 5 of? bentonite pellet layer to near the ground surface. After grouting, no work will be done on the monitoring well until the grout has set for a minimum of 24 hours.
When the casing hammer air rotary or similar method is used to complete the borehole for a monitoring well, the protective casing will be jacked out of the borehole gradually as the filter pack, bentonite pellets, and cementing operations are in progress.

2.1.4 Capping Monitoring Well
Upon completion of the work, a suitable watertight, cap or plug will be fitted on the top of the well casing to prevent the entry of surface runoff or foreign matter. The well will be completed either: (I) above the ground surface using a locking, steel protective well cover set in concrete; or (2) below the ground surface using a watertight, traffic-rated valve-box with a bolt-down cover. The cover of the valve box will be stamped or cast with "Monitoring Well."

2.2 Piezometer Installation

The piezometer will be designed to register the potentiometric surface of a specific depth zone encountered beneath the drill site. The MFG field geologist, in consultation with the MFG Project Manager, will specify the exact depths of the piezometers using the lithologic log and geophysical log (if performed) for control. Drilling and logging of the boreholes for the piezometers will be in conformance with the MFG SOP entitled SUPERVISION OF EXPLORATORY BORINGS. Construction, completion and development of the piezometers will generally follow the same procedures as those for monitoring wells (see Section 2.0 above), except that a piezometer may be completed with casing material of less than two inches in diameter and may use a porous tip (ceramic or other material) in place of perforated casing.

MFG, Inc.MFGSOPNo.6 Rev. No. I Date: August 2000 Page 6 of7 2.3 Documentation and Records Management
The MFG field geologist will complete a Well Construction Summary form for each monitoring well (Figure SOP-6-1). The completed form will be submitted to the MFG Project Manager and included in the project files. In addition to the information requested on the Well Construction Summary form, the MFG field geologist will record the volumes and types of well construction materials (filter material, bentonite, cement, etc.) used for each well in their field notes. Also, the daily events and other items not covered in the Well Construction Summary form will be entered on a Daily Field Record form in accordance with the procedures contained in the MFG SOP entitled FIELD DOCUMENTATION.

3.0 QUALITY ASSURANCE/QUALITY CONTROL

3.1 Cleaning of Equipment Used in Drilling, Well Construction
The drilling equipment will be thoroughly steam cleaned before and after installation of each monitoring well or piezometer. Only clean, potable water from a municipal supply will be used as makeup water for drilling fluid and for decontamination of drilling equipment. An acid rinse (0.1 N HCI) or solvent rinse (i.e., hexane or methanol) may be used to supplement the steam cleaning if tarry or oily deposits are encountered. Equipment cleaned in this manner will be thoroughly steam cleaned prior to reuse or leaving the site.
Well casing that is not factory cleaned and in a sealed container will be steam cleaned thoroughly before it is installed. This cleaning is particularly critical to prevent cross contamination in a multi-aquifer environment. After cleaning, the casing will be covered with plastic to protect it from contact with dust or other contaminants.

MFG, Inc.MFGSOPNo.6 Rev. No. I Date: August 2000 Page 7 of7 Equipment will be cleaned by scrubbing with a stiff brush using a laboratory-grade detergent/water solution, followed by rinsing with clean, potable, municipal water, then rinsing with distilled or deionized water. Alternatively, the equipment may be steam cleaned followed by rinsing with distilled or deionized water. An acid rinse (0.1 N Hel) or solvent rinse (i.e., hexane or methanol) may be used to supplement these cleaning steps if tarry or oily deposits are encountered. The acid or solvent rinse will be followed by thoroughly rinsing with municipal water and then with distilled or deionized water. After cleaning, equipment will be packaged and sealed in plastic bags or other appropriate containers to minimize contact with dust or other contaminants.



### 3.2 Records Review
The Project Manager or designated QA reviewer will check and verify that documentation has been completed and filed per this procedure.

MFG, Inc.MFGSOPNo.9 Rev. No.1 Date: August 2000 Page I of5 

### MFG, Inc. STANDARD OPERATING PROCEDURE No.9 SOIL AND SEDIMENT SAMPLING FOR CHEMICAL ANALYSIS

1.0 SCOPE AND APPLICABILITY

This Standard Operating Procedure (SOP) describes the protocols to be followed when soil and sediment samples are collected for physical or chemical analysis. The procedures presented herein apply to: soil sampling from the surface, soil sampling when drilling boreholes, and sediment sampling from surface waters, wetlands, drainage structures, etc. These procedures are intended to be general in nature. Appropriate revisions may be made when approved in writing by the MFG Project Manager to address site-specific conditions or project-specific protocols.



### 2.0 PROCEDURES

2.1 Surface Soil and Sediment Sample Collection

This section describes sampling of soils and sediment from near the land surface, including the bottom or sides of an excavation and the bottom of a surface water drainage course. The collected samples will be placed in appropriate sample containers, as designated by the laboratory, for the parameters to be analyzed.

2.1.1 Surface Soil Sampling

Soil will be removed using a spade and, if necessary, a post-hole digger to the top of the targeted sampling interval.

MFG, Inc.MFG SOP No.9 Rev. No. I Date: August 2000 Page 2 of5 A. Direct Sampling Method

-- A stainless-steel or, as appropriate, plastic instrument (trowel, scoop) will be used to recover the sample directly into appropriate containers provided by the analytical laboratory. B. Manual Core Sampler Method

-- A slide-hammer core sampler with brass or stainless steel liners may be used to recover a relatively undisturbed core sample. Extension sections may be added to reach deeper sampling intervals. This method is recommended for samples that will be analyzed for volatile organic compounds. C. Hand Auger Method -- A hand auger with stainless-steel auger and sampler sections may be used to advance and sample the boring. Extension sections may be added to reach deeper sample intervals.

2.1.2 Sampling Sediment in a Surface Water Course

Sediment in a surface water course with little or no free water may be sampled by directly scooping the sample with a stainless steel or, as appropriate, plastic instrument (trowel, scoop). All sediments, including sediment submerged under water, may be sampled by the following methods:

A. Direct Sampling Method

-- Fluid sediment may be collected directly using the sample container. If sampled under water, the container will be capped in place to avoid disturbance while surfacing. B. Manual Core Sampler Method -- A slide-hammer core sampler with brass or stainless steel liners may be used to recover a relatively undisturbed core sample ofthe sediment. An extension section may be added to reach sediment intervals in deeper waters. C. Remote Scoop Method -- A sampling cup or container attached to a pole may be used to collect a sediment sample in deeper water or where a longer reach is needed. D. Bottom Sampling Dredge Method

-- A sampling dredge attached to a cable also may be used to recover sediment samples in deeper waters.

2.2 Sample Collection During the Drilling of Borings
During borehole drilling, core samples may be collected for chemical analysis by lining the core barrel or drive sampler with clean brass or stainless steel liners. The procedures for obtaining soil
MFG, Inc.MFGSOPNo.9 Rev. No. I Date: August 2000 Page 3 of5

cores are discussed in the MFG SOP entitled SUPERVISION OF EXPLORATORY BORINGS. The drive sampler or core barrel will be steam cleaned or washed with a laboratory-grade detergent and water solution to remove dirt, rinsed with tap water, and then rinsed with distilled
or deionized water prior to and between sampling. Upon disassembly of the soil sampler by the drilling contractor, the MFG field geologist will take possession of the core. The core will be parted at the joints between the liners using a clean, sharp, stainless steel knife or spatula or similar implement. The most representative liner(s) in the drive sampler will be preserved for chemical analysis.

2.3 Sample Preservation

The soil or sediment sample will be quickly inspected for color, appearance, and composition, then capped immediately. If brass or stainless steel liners are used, the ends of the tube will be covered with Teflon® sheeting and then capped with clean polyethylene slip caps. The capped ends will be sealed with duct tape. The sample will be placed in a plastic, ziplock bag and stored (in an ice-cooled, insulated chest, if necessary) until delivery to the laboratory.

2.4 Sample Labeling

The sample container will be labeled with self-adhesive tags. Each sample will be labeled with the following information in waterproof ink:
A. Project identification; B. Sample identification; 

### C. Date and time sample was obtained; D. Sample Depth Interval (feet below ground level); and E. First initial and last name of sample collector(s).

MFG, Inc.MFG SOP No.9 Rev. NO.1 Date: August 2000 Page 4 of5 2.5 Documentation and Record Management
2.5.1 Daily Field Record

An MFG field representative will document the activities of each day of field work chronologically in accordance with the procedures contained in the MFG SOP entitled FIELD DOCUMENTATION. For soil sampling. the Daily Field Record (included in the MFG SOP entitled FIELD DOCUMENTA nON) or field notebook entries should include the following items:

A. Decontamination Record: Decontamination method, source of tap water or deionized water, type of detergent or other cleaning agent; B. Sample Inventory Record: Sample identification, location, date and time of sampling, sample depth interval, analyses requested and analysis methods; C. Sampling Location Map: Surface soil sampling only, include scale, orientation, sample locations tied into a permanent reference point and sample identifications; and D. Sampling Equipment Record: Description of sampling methodology and equipment including unique equipment identification, if available. Copies of these records will be placed in the project files. Sample location and depth information should also be included in any electronic database maintained for the project.

2.5.2 Log of Boring Activity
The depth intervals of the soil samples collected for chemical analysis, the sampling date and times, and the sample identifications will be documented by the MFG field geologist on the Log of Boring forms (included in the MFG SOP entitled SUPERVISION OF EXPLORATORY BORINGS) in the portion of the boring log corresponding to the sample interval. The original Log of Boring will be submitted to the MFG Project Manager upon completion of the borehole for placement in the MFG project file.

MFG, Inc.MFG SOP No.9 Rev. No.1 Date: August 2000 Page 5 of5
2.5.3 Sample Custody

A Chain-of-Custody and Request for Analysis (CC/RA) form will be filled out for every sampling event or shipment, whichever is more frequent. Sample custody procedures and CC/RA form are discussed in the MFG SOP entitled SAMPLE CUSTODY, PACKAGING AND SHIPMENT.

3.0 QUALITY ASSURANCE/QUALITY CONTROL

3.1 Equipment Cleaning
The sampler, liners, polyethylene end caps, parting knife, and any tools used in the assembly and disassembly of the sampler will be cleaned before and after each use. Equipment will be cleaned by scrubbing with a stiff brush using a laboratory-grade detergent/water solution, followed by rinsing with clean, potable. municipal water, then rinsing with distilled or deionized water. Alternatively, the equipment may be steam cleaned followed by rinsing with distilled or deionized water. An acid rinse (0.1 N HCI) or solvent rinse (i.e., hexane or methanol) may be used to supplement these cleaning steps if tarry or oily deposits are encountered. The acid or solvent rinse will be followed by thoroughly rinsing with municipal water and then with distilled
or deionized water. After cleaning, equipment will be packaged and sealed in plastic bags or other appropriate containers to minimize contact with dust or other contaminants.

3.2 Record Review

The project manager or designated QA reviewer will check and verify that documentation has been completed and filed per this procedure and the other procedures referenced herein.

MFG, Inc.MFG SOP No. 12 Rev. NO.1 Date: August 2000 Page 1 of 11 MFG, Inc. STANDARD OPERATING PROCEDURE No. 12 WATER QUALITY SAMPLING

1.0 SCOPE AND APPLICABILITY
This Standard Operating Procedure (SOP) describes the protocol to be followed during sampling of surface water, groundwater, stormwater or waste water. Note that the protocol for collection of non-aqueous phase liquid (NAPL) samples from monitoring wells is provided in the MFG, Inc. (MFG) SOP entitled WATER LEVEL, IMMISC18LE LAYER AND WELL DEPTH MEASUREMENT. The procedures presented herein are intended to be general in nature. Appropriate revisions may be made to accommodate site-specific conditions or project-specific protocols when they are approved in writing by the MFG Project Manager or detailed in a project work plan, sampling plan or quality assurance project plan.

2.0 PROCEDURES

2.I Groundwater Sample Collection
Individual samples from wells will be collected as follows:
A. The depth to water, the thickness or presence of a Non-Aqueous Phase Liquid (NAPL) in a well and the total depth will be measured using the procedures discussed in the MFG SOP entitled WATER LEVEL, IMMISC18LE LAYER AND WELL DEPTH MEASUREMENT. B. A positive displacement pump, submersible pump, and/or bailer will be used for removing the groundwater in the monitoring wells (purging). Equipment used for purging and sampling may be permanently installed (dedicated) in the monitoring wells. Care must be taken that bailers and/or tubing are constructed from materials that will not affect the sample analyses.

MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 2 of II C. Wells will be pumped or bailed at least until the volume of water removed is equal to three casing volumes (volume of standing water in the well based upon total depth of well, the depth to water, and the well casing diameter). The purge rate must not reach a point where the recharge water is entering the well in an agitated manner. To assure that the water samples are representative of the water-yielding zone, periodic measurements of the temperature, pH, and specific conductance will be made. The sample will be collected only when the temperature, pH and specific conductance reach a relatively constant value (see Section 2.8) or after five well volumes have been removed. If the yield of the well is low such that it can be bailed or pumped dry, then the recharged groundwater in the well will be considered representative regardless of the number of casing volumes of groundwater removed, since all standing water in the well has been replaced by recharge from the water-yielding zone. If a well is purged dry, the well can be sampled upon 90% recovery or after two hours, whichever occurs first. D. For specific projects, a low-flow purge method or "micopurge" method may be used for sample collection. Wells will be purged at a low pumping rate to minimize agitation of water in the well and minimize drawdown. The goal is to limit drawdown in the well to less than 10 percent of the length of the saturated well screen. If the initial water level is above the top of the screen, then the goal is to limit drawdown due to purging so that the water level 

### in the well does not drop below the top of the screened interval. Wells will be purged by pumping water at a rate less than 250 mL per minute. Bailers will not be used for purging of sampling wells. E. A sample drawn from plumbing on municipal or domestic wells will be taken at the access valve closest to the well and upstream of any water softening or chlorination input. F. Prior to collecting samples from a well, a clean plastic apron will be placed adjacent to or around the well to prevent equipment and sample containers from coming into contact with surface materials. Alternatively, a clean field table may be set up near the well. If used, the table will be cleaned (Section 6.0) before and after use at each well. G. Sample containers prepared specifically for the required analyses by the analytical laboratory or their supplier will be used for sample collection. Samples for volatile organic compound analyses will be collected first. To collect a sample in a volatile organic analysis (VOA) vial, remove the cap with Teflon-lined septum, then fill slowly (avoiding agitation) until a miniscus of sample water (held by surface tension) extends above the top of the vial. Carefully replace the cap, then turn the vial upside down and tap gently while checking to ensure that no headspace (air bubhles) is present in the vial. Other glass sample bottles for semi- and non-volatile analyses should be filled to near the top. To account for slight expansion due to temperature changes, leave headspace approximately equivalent to the volume ofliquid which would fill the bottle's cap. Plastic sample bottles should be filled completely. Splashing of the water in the sample container and exposure to the atmosphere shall be minimized during
MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 3 of II sampling. The container cap will be screwed on tightly immediately after filling the sample container. Sample filtration, if necessary, is discussed in Section 2.4 ofthis SOP. Sample bottles that do not contain preservative should be rinsed with the sample water prior to filling. H. Where more than one well within a specific field or site is to be sampled, the sampling sequence should begin with the well having the lowest suspected level of contamination. Successive samples should be obtained from wells with increasing suspected contamination. If the relative degree of suspected contamination at each well cannot be reasonably assumed, sampling should proceed from the perimeter of the site towards the center ofthe site. The sampling sequence should be arranged such that wells are sampled in order of increasing proximity to the suspected source of contamination, starting from the wells up-gradient of the suspected source. I. Sampling activity for each monitoring well will be recorded on a Groundwater Sampling Record (example attached).

2.2 Surface Water Sample Collection
Individual samples from surface water sampling stations will be collected as follows:

A. Where multiple sampling stations exist along a moving water source (i.e., a creek or drainage channel), the downstream station will be sampled first. A moving water sample will be taken from the portion of the water with maximum flow at any given sampling station unless otherwise specified. If the sampling point is inaccessible from shore, the sampling personnel will enter the water from a point downstream of the sampling point, taking care not to disturb the water. B. A standing water sample will be taken at a point in the body of water at least three feet from the shore, if possible, or unless otherwise specified. C. A surface water sample will be collected according to one of the following, or similar, techniques. I. Direct Method

-- Sample bottle is inverted, submerged to the specified depth, turned upright, removed from the water, and then capped. Add preservative, if any, after sample collection. 2. Dipper Method -- Sample bottle or container attached to a pole is dipped in the water, raised above the water, and then capped (if actual sample bottle used).

MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 4 of 11 3. Bailer Method -- A appropriate sampling bailer with a ball check valve is submerged to the desired sample depth, either directly or by suspending the bailer on a rope from a pole. 4. Syringe Method (for very shallow water) -- A disposable plastic filtering syringe may be used to collect very shallow surface water without disturbing the sediment. The syringe will be disposed of after each use. 5. Peristaltic Pump Method -- The sample is collected through a section of new, clean, flexible Tygon (polyvinylchloride) tubing. The tubing intake will be secured manually or by attaching weights. This procedure may be modified to collect the sample through a Teflon tube into a sample flask by running the pump on a vacuum. D. The first collected water will be used to rinse the sampling equipment. Sample bottles that do not contain preservative should be rinsed with the sample water prior to filling. Subsequent water collected will be used to fill the analytical sample bottles until all bottles are filled. Field measurement of parameters will be taken once for each sampling station. Field parameters (pH, specific conductance, temperature, odor, turbidity, and/or sediment) will be measured from a separate container (instruments will not contact the analytical samples). E. A stake or pole identifying the sampling station should be placed at or near the sampling station for future identification of the location. MFG personnel will record a brief description of the stake or pole location in relation to permanent landmarks, and the sampling location in relation to the stake or pole (example: stake is approximately 100 feet west along Markley Creek from Somersville Road, on northside shore. Sampling point is 25 feet south of stake, in middle of Markley Creek). MFG personnel will include a sketch map of the sampling station in the Surface Water Sampling Record (example attached).

2.3 Sample Filtration
When required, a field-filtered water sample will be collected using a disposable, in-line 0.45 fun filter. The water sample will be pumped through the filter using a peristaltic pump and a section ofTygon (polyvinylchloride) tubing or other appropriate method. An aliquot of approximately 100 ml of sample will be run through the tubing and filter prior to collection into the sampling containers. Both the filter and tubing will be disposed of between samples.

MFG,lnc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 5 of 11 2.4 Sample Containers and Volumes
The sample containers will be appropriate to the analytical method and will be obtained from the water analysis laboratory or other approved source. Different containers will be required for specific groups of analytes in accordance with U.S. EPA Methods, project-specific requirements, and/or other local jurisdictional guidance. The MFG sampler will confirm with the laboratory performing the analyses that appropriate bottleware and preservatives are used and ensure that a sufficient volume of sample is collected.

2.5 Sample Labeling
Sample containers will be labeled with self-adhesive tags. Each sample will be labeled with the following information using waterproof ink.
A. Project identification; B. Sample identification; C. Date and time samples were obtained; D. Requested analyses and method; E. Treatment (preservative added, filtered, etc.); and F. Initials of sample collector(s).

2.6 Sample Preservation and Storage

If required by the project or analytical method, water samples submitted for chemical analysis will be stored at 

### 4'C in ice-cooled, insulated containers immediately after collection. Preservation and storage methods depend on the chemical constituents to be analyzed and should be discussed with the water analysis laboratory prior to sample collection. EPA and/or other local jurisdictional requirements and/or the requirements of a project-specific plan (e.g., sampling and

MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 6 of II analysis plan, work plan, quality assurance project plan, etc.) shall be adhered to in preservation and storage of water samples.

2.7 Sample Custody
Samples shall be handled and transported according to the sample custody procedures discussed in the MFG SOP entitled SAMPLE CUSTODY. The sample collector shall document each sample on the Chain-of-Custody and Request for Analysis form (Figure SOP-2-l).

2.8 Field Measurements
Specific conductance, pH, and temperature measurements may be performed on water samples at the time of sample collection. Data obtained from these (or other) field water quality measurements will be recorded on the appropriate sampling records. Separate aliquots of water shall be used to make field measurements (i.e., sample containers for laboratory analysis shall not be reopened).

For groundwater samples, field measurement intervals will be calculated based upon the casing volume of the monitoring well so that at least four readings will be taken during the course of purging the target volume from the well (at least three casing volumes). Note that the target volume criteria does not apply if the well is purged dry. If the parameters have not stabilized after the target volume is removed from the well, field measurements and purging will continue until two consecutive readings have stabilized to within the following limits or until five casing volumes have been removed: Specific conductauce+/-I 0% pH +/-0.05 pH units temperature+/-I EC For surface water sampling, the parameters will be measured once and recorded.

MFG, Inc.MFG SOP No. 12 Rev. No.1 Date: August 2000 Page 

### 7 of II

2.8.1 Temperature Measurement
Temperature will be measured directly from the water source or from a separate sample aliquot. Temperature measurements will be made with a mercury-filled thermometer, bimetallic-element thermometer, or electronic thermistor. All measurements will be recorded in degrees Celsius

2.8.2 pH Measurement
A pH measurement will be made by dipping the probe directly into the water source or into a separate sample aliquot. Prior to measurement, the container in which the field parameter sample will be collected will be acclimated to the approximate temperature of the sample. This can be accomplished by immersing the container in water removed from a well during the purging process. The pH measurement will be made as soon as possible after collection of the field parameter sample, preferably within a few minutes, using a pH electrode. The value displayed on the calibrated instrument will be recorded after the reading has stabilized. Ifthe value falls outside of the calibrated range, then the pH meter will be recalibrated using the appropriate buffer solutions.

2.8.3 Specific Conductance Measurement
Specific conductance will be measured by dipping the probe directly into the water source or into
a separate sample aliquot. The probe must be immersed to the manufacturer's recommended depth. Specific conductance will be reported in micromhos/cm at 25'C. Ifthe meter is not equipped with an automatic temperature compensation function, then the field value will be adjusted at a later time using the temperature data and the following formula:

MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 8 of 11 SC 15 = SC T / [I 

### + {(T - 25) x 0.025}] where: SC" SCT T specific conductance at 25°C specific conductance measured at temperature T (OC) sample temperature (0C) The value displayed on the calibrated instrument will be recorded after the reading has stabilized. If the value falls outside of the calibrated "range" set by the range dial on the instnunent, then the range setting will be changed to a position which gives maximum definition. If the specific conductance value falls outside of the calibrated range of the conductivity standard solution, then the instnunent will be recalibrated using the appropriate standard prior to measurement.

2.8.4 Equipment Calibration
Equipment used to measure field parameters will be calibrated by MFG personnel according to manufacturer's instructions. Calibration checks will be performed at least once prior to and at least once following each day of instrument use in the field and the results will be documented on the Sampling Record for each sampling station.



### 2.9 DOCUMENTATION

2.9.1 Groundwater Sampling Record
Each sampling event for each monitoring well will be recorded on a separate Groundwater Sampling Record form, The documentation should include the following:
A. Project identification; B. Location identification; C. Sample identification(s) (including quality control samples); D. Date and time of sampling; E. Purging and sampling methods; MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 9 of II

F. Sampling depth; G. Name(s) of sample collector(s); H. Inventory of sample bottles collected including sample preservation (if any), number, and types of sample bottles; 

### 1. Total volume of water purged; J. Results offield measurements and observations (time and cumulative purge volume, temperature, pH, specific conductance, turbidity, sediment, color, purge rate); K. Equipment cleaning record; L. Description and identification offield instruments and equipment; and M. Equipment calibration record.
When the sampling activity is completed, the Groundwater Sampling Record will be checked by the MFG Project Manager or his/her designee, and the original record will be placed in the MFG project file.

2.9.2 Surface Water Sampling Record
Each sampling event for each surface water sampling station will be recorded on a separate Surface Water Sampling Record form (Figure SOP-12-2). The documentation should include the following:
A. Project identification; B. Location identification (sampling station); C. Sample identification(s) (including quality control samples); D. Date and time of sampling; E. Description of sampling location; F. Sampling depth below water surface; G. Sampling method;
MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page 10 of 11

H. Condition of water (standing or moving); 

### 1. Description of flow measurement method, if applicable, and any flow data; J. Instrument calibration and cleaning record; K. Results offield measurements and observations (time, temperature, pH, specific conductance, turbidity, sediment, color); L. Name(s) of sample collector(s); and M. Sketch map showing location of sampling station and permanent landmarks.
When the sampling activity is completed, the Surface Water Sampling Record will be checked by the MFG Project Manager or his/her designee, and the original record will be placed in the MFG project file.

3.0 QUALITY CONTROL

3.1 Chain-of-Custody and Request for Analysis Form

A Chain-of-Custody and Request for Analysis form (CCIRA form) will be filled out as described in the MFG SOP entitled SAMPLE CUSTODY. Sample custody procedures are discussed and the CCiRA form presented in the MFG SOP entitled SAMPLE CUSTODY, PACKAGING AND SHIPMENT.

3.2 Equipment Cleaning
Sample bottles and bottle caps will be cleaned and prepared by the analytical laboratory or their supplier using standard EPA-approved protocols. Sample bottles and bottle caps will be protected from dust or other contamination between time of receipt by MFG and time of actual usage at the sampling site.

MFG, Inc.MFG SOP No. 12 Rev. No. I Date: August 2000 Page II of 11 Groundwater sampling equipment may be dedicated to a particular well at a project site. Prior to installation of this equipment, all equipment surfaces that will be placed in the well or may come in contact with groundwater will be cleaned to prevent the introduction of contaminants (refer to the MFG SOP entitled EQUIPMENT DECONTAMINATION).
Sampling equipment that will be used at multiple wells or sampling locations will be cleaned after sampling at each location is completed in accordance with the MFG SOP entitled EQUIPMENT DECONTAMINATION. Equipment such as submersible electric pumps, which cannot be disassembled for cleaning, will be cleaned by circulating a laboratory-grade, detergent and potable water solution through the assembly, followed by clean potable water from a municipal supply, and then by distilled or deionized water. Equipment cleaning methods will be recorded on the Groundwater Sampling Record and Surface Water Sampling Record.

3.3 Records Review The MFG Project Manager or designated QA reviewer will check and verify that documentation has been completed and filed per this procedure.

MFG, inc.

### MFG SOP No. 16 Rev. No.1 Date: August 2000 Page I of 4 MFG,Inc. STANDARD OPERATING PROCEDURE No. 16 EQUIPMENT DECONTAMINATION

1.0 SCOPE AND APPLICABILITY
This Standard Operating Procedure (SOP) describes the methods to be used for the decontamination of all reusable field equipment which could become contaminated during use or during sampling. The equipment may include split spoons, bailers, trowels, shovels, hand augers or any other type of equipment used during field activities.
Decontamination is performed as a quality assurance measure and a safety precaution. It 

### prevents cross contamination between samples and also helps to maintain a clean working environment.
Decontamination is achieved mainly by rinsing with liquids which may include: soap and/or detergent solutions, tap water, distilled weak acid solution, and/or methanol or other solvent. Equipment may be allowed to air dry after being cleaned or may be wiped dry with chemical-free towels or paper towels if immediate re-use is necessary.
At most project sites, decontamination of equipment that is re-used between sampling locations will be accomplished between each sample collection point. Waste produced by decontamination procedures, including waste liquids, solids, rags, gloves, etc., should be collected and disposed of properly, based upon the nature of contamination. Specific details for the handling of decontamination wastes are addressed in the MFG SOP entitled STORAGE AND DISPOSAL OF SOIL, DRILLING FLUIDS AND WATER GENERATED DURING FIELD WORK or may be specified by a project plan.

MFG,lnc.MFG SOP No. 16 Rev. No.1 Date: August 2000 Page 2 of 4 2.0 PROCEDURES

2.1 Responsibilities

It is the responsibility of the field sampling coordinator to ensure that proper decontamination procedures are followed and that all waste materials produced by decontamination are properly managed. It is the responsibility of the project safety officer to draft and enforce safety measures which provide the best protection for all persons involved directly with sampling and/or decontamination.

It is the responsibility of any subcontractors (i.e., drilling contractors) to follow the proper, designated decontamination procedures that are stated in their contracts and outlined in the SiteSpecific Health and Safety Plan. It is the responsibility of all personnel involved with sample collection or decontamination to maintain a clean working environment and ensure that any contaminants are not negligently introduced to the environment.

2.2 Supporting Materials

I. Cleaning liquids: soap and/or detergent solutions (Alconox, etc.), tap water, distilled water, methanol, weak nitric acid solution, etc. 2. Personal protective safety gear as defined in the Site-Specific Health and Safety Plan. 

### 3. Chemical-free towels or paper towels. 4. Disposable, nitrile gloves. 5. Waste storage containers: drums, boxes, plastic bags, etc. 6. Cleaning containers: plastic and/or stainless steel pans and buckets. 7. Cleaning brushes. 8. Aluminum foil.

MFG, Inc.MFG SOP No. 16 Rev. No. I Date: August 2000 Page 3 of4

2.3 Methods The extent of known contamination will determine the degree of decontamination required. If the extent of contamination cannot be readily determined, cleaning should be done according to the assumption that the equipment is highly contaminated. Decontamination procedures should account for the types of contaminants known or suspected to be present. In general, high levels of organic contaminants should include an organic solvent wash step, and high levels of metals contamination should include a weak acid rinse step.

The procedures listed below constitute the full field decontamination procedure. If different or more elaborate procedures are required for a specific project, they may be specified in sampling and analysis or work plan. Such variations in decontamination protocols may include all, part or
an expanded scope of the decontamination procedure stated herein.
I. Remove gross contamination from the equipment by dry brushing, and rinse with tap water. 2. Wash with soap or laboratory-grade detergent solution. 3. Rinse with tap water. 4. Rinse with methanol (optional, for equipment potentially contaminated by organic compounds). 5. Rinse with acid solution (optional, for equipment potentially contaminated by metals). 

### 6. Rinse with distilled or deionized water. 7. Repeat entire procedure or any parts of the procedure as necessary. 8. Air dry.
Decontaminated equipment should be stored in sealable containers, such as Ziplock-type plastic bags or cases or boxes with lids.

MFG, Inc.

### MFG SOP No. 16 Rev. No. I Date: August 2000 Page 4 of4 2.4 DOCUMENTATION
Field notes will be kept describing the decontamination procedures followed. The field notes will be recorded according to procedures described in the MFG SOP entitled FIELD DOCUMENTATION.

3.0 QUALITY CONTROL
To assess the adequacy of decontamination procedures, field rinsate blanks may be collected. The specific number of rinsate blanks will be defined in a sampling and analysis or work plan or by the MFG project manager. In general, at least one field rinsate blank should be collected per sampling event or per day.
Rinsate blanks with elevated or detected contaminants will be evaluated by the Project Manager, who wiII relay the results to the site workers. Such results may be indicative of inadequate decontamination procedures that require corrective actions (e.g., retraining).

MFG, Inc.