INTERIM RESPONSE ACTION (IRA) SUMMARY REPORT

Closure of the Hydrazine Facility

Final

May 2000

Jointly developed and written by the

U.S. Environmental Protection Agency, Region 8,

and the U.S. Army, Rocky Mountain Arsenal 6432-1/1

00020069
Interim Response Action Summary Report

Hydrazine Blending and Storage Facility

Table of Contents

1.0 Introduction ............................................................ 1

2.0 Background ............................................................ 2

2.1 Investigative Studies ............................................... 3

2.2 Nature and Extent of Contamination ................................... 4

2.3 D ecision Process .................................................. 5

3.0 W ork Perform ed ......................................................... 6

3.1 HBSF Interim Response Action Phase I ................................ 6

3.1.1 Bench-Scale and Pilot-Scale Testing Program ..................... 6

3.1.2 Characterization of Hydrazine Rinsewater ........................ 6

3.1.3 Analytical Methods Development/Laboratory Certification ........... 7

3.1.4 Full-Scale Startup Operations .................................. 7

3.1.5 Decommissioning of the HBSF ................................. 7

3.2 HBSF Interim Response Action Phase II ................................ 8

3.2.1 Rinsewater Transfer .......................................... 8

3.2.2 Sludge Characterization ....................................... 8

3.2.3 Hydrazine WWTF Deactivation ................................ 8

4.0 Operations/M onitoring Results ............................................. 9

5.0 Status ................................................................. 9

6.0 R eferences ............................................................ 10
Interim Response Action Summary Report

Hydrazine Blending and Storage Facility

July 12, 1999

1.0 Introduction

In February 1989, the U.S. Environmental Protection Agency (EPA), the Department of

the Army, the Department of the Interior, the Agency for Toxic Substances and Disease

Registry (ATSDR), the Department of Justice (DOJ), and Shell Oil Company entered into

a Federal Facility Agreement (FFA) which established procedures for implementing the

Rocky Mountain Arsenal (RMA) cleanup program as specified in the Technical Program

Plan. The FFA also incorporated many provisions of the modified proposed Consent

Decree issued June 7, 1988. The Army and Shell Oil Company shared responsibility for

the various costs of the remediation to be developed and perfanned under the oversight of

the EPA, with participation by the State of Colorado. The FFA specified 13 Interim

Response Actions (IRAs) determined to be necessary and appropriate while studies for

the selection of the final remedy were ongoing. Closure of the Hydrazine Facility (FFA,

Section XXII, paragraph 22.1 (h)) is one of the 13 IRAs.

The objectives of the Hydrazine Blending and Storage Facility (HBSF) IRA, as stated in

the Final Decision Document (Army, 1988) were to meet the following specific criteria:

Treat wastewater to levels that will effectively eliminate any substantial risks to

human health and the environment associated with the contaminants of concern

(COCs), including hydrazine, monomethyl hydrazine (MMH), unsymmetrical

dimethy1hydrazine (UDNM), and n-nitrosodimethylamine (NDMA);

Use a treatment technology that is technically feasible and readily implementable;

Achieve permanent remediation through destruction of COCs to designated action

levels or reduce the toxicity, mobility, or volume of wastewater; and

Be cost-effective.

The HBSF IRA task was separated into two phases that led to the closure of the HBSF at

RMA. Phase I included planning; wastewater treatment system selection and

modification (including bench/pilot-scale testing); full-scale system installation;

analytical method development and laboratory method certification; treatment system

startup testing; and development of an implementation document for decontamination,

demolition, and disposal of structures and equipment at the HBSF; and site reclamation

(decommissioning). Phase I was concluded with the completion of decommissioning

UAWPD0CS\HYDRAZrN.WPD 1
activities. Phase II included Ul-scale operational treatment and disposal of hydrazine

wastewater stored at the HBSF and any wastewater generated during decommissioning

activities (HLA, 199 1 a).

2.0 Background

RMA occupies more than 17,000 acres (approximately 27 square miles) in Adams

County, directly northeast of metropolitan Denver, Colorado (Figure 1). The property

was purchased by the US government in 1942 for use in World War II to manufacture

and assemble chemical warfare materials, such as mustard and lewisite, and incendiary

munitions. Starting in 1953, RMA produced the nerve agent GB

(isopropyl methylphosphonofluoridate) until late 1957. A significant amount of chemical

warfare materials destruction also took place during the 1950s and 1960s. In addition to

these military activities, major portions of the plant facilities were leased to private

industries, including Shell Oil Company, between 1947 and 1982, for the manufacture of

various insecticides and herbicides. The RMA site was proposed to the National

Priorities List (NPL) in 1984 and formally designated as a Superftind site in July 1987.

The HBSF, which was operated by RMA for the U.S. Air Force (USAF) between 1962

and 1982, is located east of the South Plants area (Figure 2). The 10-acre site consists of

two tank yards, each completely surrounded by security fencing. The yards are connected

by two overhead pipelines.

The HBSF was used as a depot to receive, blend, store, and distribute hydrazine fuel

compounds manufactured elsewhere. The primary operation was blending of anhydrous

hydrazine and UDMH to produce Aerozine 50. Blending operations were not continuous

and occurred in response to requests by the USAF. Other operations at the HBSF

included loading and unloading rail cars and tanker trucks, destructing off-specification

Aerozine 50, and storing Aerozine 50, anhydrous hydrazine, MMH, monopropellent

hydrazine, hydrazine 70, UDMH, and hydrazine (Army, 1988).

Hydrazine and UDMH are unstable in the natural environment and rapidly decompose

when exposed to the atmosphere. One of the decomposition products of UDMH is Nnitrosodimethylamine (NDMA), a suspected human carcinogen. From January through

March 1982, the U.S. Occupational Safety and Health Administration (OSHA) surveyed

the HBSF and detected the presence of airborne NDMA within the HBSF in excess of

allowable exposure limits. In May 1982, RMA suspended operations and closed the

HBSF to all but safety-essential or emergency-response entries.

On September 20, 1982, the Director of Energy Management at the San Antonio Air

Logistics Center, Kelly Air Force Base, Texas, verbally notified RMA management that

the hydrazine mission would be phased out; all product was to be blended and removed

as soon as possible. Air sampling programs conducted by the Army Envirom-nental

UAWPD0CS\HYDRAZ1N.WPD 2
Hygiene Agency (AEHA) in December 1982 and January 1983 concluded that NDMA

was present as an air contaminant at the HBSF site. In April 1983, RMA conducted an

intensive effort to repair UDMH leaks in the fuel system. Two rounds of testing and

repairs were accomplished; however, area air sampling conducted after the second round

still indicated the presence of NDMA. At a meeting between the USAF and the Army,

May 5 and 6, 1983, it was agreed that the best approach to eliminate the presence of

NDMA was to remove all fuel and to decontaminate the HBSF facility. To this end, the

last shipment of hydrazine was removed from the site at the end of April 1986 (IT Corp,

1993).

Following the discontinuation of operations at the HBSF in 1983, tanks that were used to

store hydrazine fuel compounds were decontaminated. The decontamination procedure

consisted of pumping a sodium hypochlorite solution through horizontal hydrazine fuel

storage tanks HAS-1, HAS-2, HAS-3, CS-1, US-1, and US-2, located at the west area of

the HBSF. The decontamination solution was subsequently pumped into tanks US-3 and

US-4 located at the east area of the HBSF. In addition, an in-ground concrete sump

located in the west area of the HBSF received water used to decontaminate various

portions of the HBSF (Figure 3). Secondary containment structures associated with

hydrazine fuel storage tanks HAS-1, HAS-2, HAS-3, CS-1, US-1, and US-2 were

connected to the in-ground concrete sump via buried pipelines. Volumes of wastewater

stored in tanks US-3, US-4, and the in-ground concrete sump were approximately 50,000

gallons, 200,000 gallons, and 40,000 gallons, respectively (HLA, 1991).

2.1 Investigative Studies

A RMA memorandum for the record in 1976, describes the HBSF as continuing to be a

neglected facility receiving low priority in USAF support, and a military construction

project data sheet from 1978, described the facility as having been in operation for 18

years, with only minor upgrading. Site inspections of the facility in 1978 revealed that

almost every major fuel product line valve was leaking and at least three were frozen in

the open position. The inspection noted that in many areas the pipe insulation had

deteriorated, exposing the piping to the weather (Ebasco, 1988).

Previous investigative studies conducted at the HBSF included a soil gas survey and

Contamination Assessments (Phases I and II). The soil gas survey was conducted in

1983 at the HBSF. The soil gas detectors were placed at 16 sample locations: two in the

east yard, one between the yards, three outside the west yard, and ten in the west yard.

The detectors consisted of curie point wires tipped with an absorbent. These detectors

were covered with aluminum cans, buried in shallow holes in the soil, and left in place for

seven days. After recovery, the contents of the absorbent were analyzed using a mass

spectrometer. Any hydrazine and related hydrazine fuels that were trapped in the wire

Aetectors were expected to break down during this process, producing nitrogen and other

analytes.

UAWPDOCS\RYDRAZ1N.WPD 3
The HBSF was investigated under the Phase I Contamination Assessment in the spring of

1986. Prior to conducting field work, a field reconnaissance of this site was conducted to

assess and stake the boring locations. During the field program several of the proposed

Phase I borings were relocated to areas where potential contamination was more likely,

such as low areas and along railroad tracks where loading and unloading operations could

have caused leaks or spills. A total of 15 soil borings, yielding 54 samples, were drilled

to depths ranging from 5 to 40 feet below ground surface. Samples were analyzed by gas

chromatography/mass spectrometry (GC/MS) for volatile organics and semivolatile

organics; by an inductively coupled argon plasma (ICP) screen for metals; and by

separate analyses for hydrazines, nitrosamines, dibromochloropropane, arsenic, and

mercury. The intent of the Phase I field program was to delineate a worst-case volume of

potentially contaminated soil at the HBSF; however, Phase II field investigations were

proposed to further define the Phase I findings (Ebasco, 1988).

The Phase II program was conducted to further define local occurrences of potential

contamination within the site and to assess the presence of hydrazines and nitrosamines in

specific areas not sampled during Phase 1. During the Phase II field program, 37 borings

(16 drilled to approximately 5 feet, I drilled to 6 feet, 9 drilled to 10 feet, 8 drilled to 15

feet, I drilled to 20 feet, I drilled to 22.5 feet, and I drilled to 25 feet) yielded 104

samples (Ebasco, 1989). Samples collected during the Phase II program were analyzed

for volatile halogenated compounds, semivolatile organic compounds, organochlorine

compounds, organosulfur compounds, organonitrogen compounds and metals. No

samples were analyzed for hydrazines because the laboratory was unable to complete

U.S. Army Toxic Hazardous Materials Agency (USATHAMA) certification of a Phase II

gas chromatography (GC) method for hydrazines in the time allotted.

2.2 Nature and Extent of Contamination

The soil gas samples collected during the 1983 soil gas survey were analyzed using a

mass spectrometer to detect any hydrazine and related hydrazine fuels that were trapped

on the wire detectors. Hydrazine and related fuels were expected to have broken down

during this process, producing nitrogen and other analytes. Levels of nitrogen over 20

times background values were detected in the mass spectrometric results. However,

because nitrogen was measured, and not hydrazines, this indirect method was neither

intended to, nor capable of, confirming the presence of hydrazine in the soil or

groundwater beneath the HBSF (Ebasco, 1988).

Phase I soil samples from the HBSF contained methylisobutyl ketone, dieldrin, cadmium,

chromium, copper, lead, zinc, and arsenic. The number of samples containing these

analytes, and the concentration range, median, mean, standard deviation, and detection

limit, are listed in Table 1. In samples from the alluvium, all of the previously listed

compounds were found in or near the west yard of the HBSF, or under the overhead pipe

connecting the two yards (Ebasco, 1988).

UAWPDOCS\HYDRAZ1N.WPD 4
Phase Il soil samples from the HBSF contained aldrin, hexachlorocyclopentadiene,

dieldrin, endrin, isodrin, dichlorodiphenylethane, dichlorodiphenyltrichloroethane,

cadmium, chromium, copper, lead, zinc, arsenic, and mercury. The number of samples

containing each analyte and the concentration range, median, mean standard deviation

and detection limit, are listed in Table 2 (Ebasco, 1989). As with the Phase I soils data,

the metals data are believed to be naturally occurring in the samples obtained from the

bedrock (Ebasco, 1988).

2.3 Decision Process

The HBSF was identified in the FFA (DOJ, 1989) as a contaminant source requiring an

IRA. The Army had already prepared a Decision Document (Army, 1988) which

evaluated the following six alternatives for the treatment and disposal of liquid waste

products stored at the HBSF:

Chlorination/ultraviolet (UV) light

Ozonation

Evaporation pond,

Off-site incineration

Ozone/UV light

UV light/chemical oxidation

From these alternatives the Final Decision Document (Army, 1988) selected the UV

light/chemical oxidation process for the treatment of rinsewater and disposal of the

treated water to the RMA Sewage Treatment Plant (STP) as the preferred treatment and

disposal alternative. The Final Decision Document also cited dismantlement and disposal

of the HBSF structures.

An Implementation Document for Phase I (HLA, 199 1 a) documented the design portion

of Phase I for the HBSV IRA. The design portion of Phase I included bench- and pilotscale testing of UV light/chemical oxidation systems for treatment of hydrazine

rinsewater, characterization of the hydrazine rinsewater, analytical methods development

and laboratory certification for analysis of hydrazine fuel compounds (hydrazine, MMH,

and LTDMH) and NDMA in rinsewater stored at the HBSF, and full-scale startup testing

of a UV light/chemical oxidation treatment system (HLA, 199 1 a).

On November 14, 199 1, the Army issued an Amendment to the Final Decision Document

(HLA, 1991c) citing transfer of the hydrazine rinsewater from the HBSF to Pond A at

Basin F and incineration of the rinsewater along with the Basin F liquids in the

submerged quench incinerator (SQI) as the preferred treatment and disposal alternative in

lieu of treatment via the LTV light/chemical oxidation process and disposal to the STP. An

Implementation Document for Phase 11 (HLA, 199 1 b) documented this design portion of

Phase II for the HBSF IRA consisting of transferring the hydrazine rinsewater from the

UAWPD0CS\HYDRAZrN.WPD 5
HBSF to the Pond A surface impoundment for the Basin F liquid and incinerating the

hydrazine rinsewater with the Basin F liquid in the SQI at RMA (HLA, 1991b).

3.0 Work Performed

The HBSF IRA was accomplished in two phases, which led to the complete

decominissioning of the HBSF. The following two subsections summarize the phases.

This information was obtained ftom the Final Decommissioning Technical Report (HLA,

1992).

3.1 IIBSF Interim Response Action Phase I

Phase I of HBSF IRA included bench- and pilot-scale testing of LTV light/chemical

oxidation treatment systems, rinse water characterization, analytical methods

development and laboratory certification, full-scale startup operations, and

decommissioning of the HBSF. The following paragraphs summarize these Phase I

activities.

3.1.1 Bench-Scale and Pilot-Scale Testing Program

Bench- and pilot-scale testing were performed at the manufacturing facilities of qualified

vendors of UV light/chemical oxidation systems to evaluate whether the currently

available technology was capable of treating the hydrazine rinse water stored at the HBSF

to the action levels identified for this IRA. In general, the results from the bench- and

pilot-scale testing program indicated that the hydrazine fuel compounds could be reduced

to below method reporting limits (MRLs), and NDMA could be reduced to less than 0.2

micrograms per liter (Ag/1). These removal results were judged adequate for the purpose

of selecting a vendor to conduct filll-scale startup testing. On the basis of performance

results, in conjunction with other evaluation criteria, the UV light/chemical oxidation

system manufactured by PSI was selected for use in the ftill-scale startup testing program.

3.1.2 Characterization of Hydrazine Rinse Water

During January 1990, samples were collected ftorn tanks US-3 and US-4 and the inground concrete sump at three depths. The samples were analyzed for various

constituents of interest, in addition to NDMA and the hydrazine fuel compounds, to

provide characterization of the rinse water for planned HBSF IRA activities. Analytical

results indicated tank US-4 contained the highest concentrations of NDMA and hydrazine

fuel compounds.

3.1.3 Analytical Methods Development/Laboratory Certification

UAWPD0CS\HYDRAZ1N.WPD 6
Methods were successfully developed and certified in accordance with the Program

Manager for RMA (PMRMA) laboratory certification program for NDMA, hydrazine,

MME, and UDMH. The concentrations to which certified reporting limits (CRLs) were

obtained are reported in Table 3. The CRLs are adequate to achieve the action level

specified in the final Decision Document for LJDMH (25 ýzg/l) and to exceed the Decision

Document action level of 20,ug/1 for MMH. A technology-based action level was

established for, hydrazine on the basis of analytical method development and method

certification of hydrazine in rinse water at a CRL of 9.9,ug/l. A technology-based action

level was established for NDMA at 5 Mg/I on the basis of treatment results demonstrated

in the startup testing program.

3.1.4 Full-Scale Startup Operations

From September to December 1989, the Army constructed the Hydrazine Wastewater

Treatment Facility (WWTF) for full-scale startup operations. Various operating

procedures and adjustments involving pretreatment for iron removal, pH, UV intensity,

hydrogen peroxide concentration, and treatment time were tested and evaluated during

full-scale startup testing of the UV light/chemical oxidation treatment system. Treatment

of nine batches (approximately 1, 100 gallons per batch) was performed.

An air-monitoring program was conducted during full-scale startup testing at the WWTF

to monitor and evaluate the integrity of the UV light/chemical oxidation treatment system

and to monitor personnel during operation and maintenance of the facility. Several

methods for evaluating concentrations of hydrazine, MMH, UDMH, NDMA, and volatile

organic compounds in air were used. Results of the monitoring program indicated that

concentrations of the hydrazine fuel compounds were well below regulatory and

recommended limits. Because low concentrations of NDMA were consistently detected,

supplied air was used by operations personnel during full-scale startup testing.

3.1.5 Decommissioning of the HBSF

During October 1989, an inventory of the HBSF site was conducted to review and verify

previous investigation reports and assess overall site conditions for planning of the

decontamination, demolition, and restoration of the HBSF site. Quantities, condition, and

materials of construction for aboveground and buried piping, tanks, structures, and other

facilities were assessed.

From May 1991 to July 1992, IT decontaminated, demolished, and disposed HBSF

structures both aboveground and below ground. Details of the decommissioning

activities are presented in the IT final report (IT Corp, 1993).

UAWPD0CS\HYDRAZrN.WPD 7
3.2 HBSF Interim Response Action Phase 11

Phase 11 of the HBSF IRA included rinse water transfer, sludge characterization, and

Hydrazine WWTF deactivation. The following paragraphs summarize these Phase Il

activities.

3.2.1 Rinse Water Transfer

Because the Amendment to the Final Decision Document (HLA, 199 1 c) revising the plan

for treatment and disposal of the hydrazine stored rinse water, the rinse water was

transferred from the HBSF to the Basin F Pond A for later incineration as part of the

Basin F IRA. The rinse water stored in tanks US-3, US-4, and the in-ground concrete

sump and decontamination water from decommissioning activities were transferred via

vacuum tanker truck from the east and west areas of the HBSF. Approximately 310,200

gallons of rinse water were transferred to Pond A, including stored hydrazine rinse water,

decommissioning decontamination water, precipitation runoff, and decontamination

water from deactivation of the Hydrazine WWTF.

3.2.2 Sludge Characterization

On January 24, 1992, HLA collected one sludge sample each from tanks US-3 and US-4.

(No sludge material was encountered in the in-ground concrete sump after transfer of

rinse water.) The samples were analyzed to assess the hazardous nature of the sludge

using the standard Environmental Protection Agency Test Method for Evaluating Solid

Waste (SW-846). At the request of PMRMA, HLA also analyzed the samples for

chemicals historically associated with activities at RMA, in addition to contaminants

regulated under Resource Conservation and Recovery Act (RCRA). The sludge samples

did not exceed the RCRA regulatory limits, i.e., the sludge did not exhibit any of the four

characteristics (toxicity, ignitability, reactivity, corrosivity) required to be classified as a

RCRA characteristic waste.

3.2.3 Hydrazine WWTF Deactivation

Deactivation of the Hydrazine WWTF was completed in June 1992. The deactivation

included the following activities:

0 Draining and rinsing of tanks

0 Dismantling, draining, and flushing of piping

0 Scrubdown of the facility floor and walls

0 Demobilization of rental equipment

0 Inventory of property

a General cleanup

UAWPD0CS\HYDRAZrN.WPD 8
In summary the IRA for the HBSF began in April 1989 and was completed in July 1992.

The cost for the HBSF IRA was $13,800,000.

4.0 Operations[Monitoring Results

On February 26, 1993, the U.S. Army Corps of Engineers modified its contract with IT to

incorporate a soil borehole drilling and sampling program at the HBSF. The modification

required IT to drill 23 boreholes, analyze the soil samples using a qualified laboratory,

and deten-nine if hydrazine compounds and/or NDMA were present in the soils based on

these analyses. The drilling was conducted with a CME 75 mobile drilling rig equipped

with an 8.5-inch O.D. continuous Right hollow stem auger. The soil samples were

collected in 1.5-foot and 2-foot long sample tubes equipped with stainless steel liners.

Soil samples were analyzed for hydrazine compounds, NDMA, volatiles,

semivolatiles/organochlorine pesticides and heavy metals. After completion of the

boreholes, the soil borings were backfilled with soil cuttings to an elevation of no less

than one foot from the ground surface and then grouted to grade (IT Corp, 1993).

Air monitoring and sampling were conducted during this drilling and sampling event.

This program consisted of real-time air monitoring for hydrazine, organics, inorganics,

flammability limits, and oxygen concentrations. Air sampling and analysis were

performed for N-nitroso compounds. Analytical results of air sampling for N-nitroso

compounds during drilling operations reported no measurable quantities of NDNIA.

After the drilling and sampling activities were completed, the drill rig, augers and

sampling equipment were decontaminated at a temporary equipment decontamination

pad. The wastewater generated during decontamination activities was transported to the

Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)

WWTF for disposal.

Hydrazine compounds (hydrazine, MMH, and UDMH) were detected (at a concentration

less than the certified reporting limit) in soil boring Nos. SB-06 and SB- 14. NDMA was

detected at borehole Nos. SB-06, SB-10, SB-11, and SB-13. The highest concentration

of NDMA was located at boring No. SB- 13 (0.062 Iig/g), directly beneath the former

location of storage tank CS- I (IT Corp., 1993).

5.0 Status

The HBSF IRA was completed in 1992. Uncontaminated materials at the site were

salvaged for recycling and reuse, and contaminated materials were disposed at an offpost

permitted hazardous waste landfill. The area encompassing the former facility was

regraded and revegetated following demolition and debris removal (Army, 1996).

UAWPD0CS\HYDRAZ1N.WPD 9
6.0 References

Department of the Army. Final Decision Document for the Interim Response Action at

the Rocky Mountain Arsenal Hydrazine Blending and Storage Facility. October 1988.

DCN: 198-RII-RT-GNQM

Department of the Army. Record of Decision for the On-Post Operable Unit. June 1996.

Document Control Number: 3102-036-RT-BJFM

Ebasco Services Inc. Draft Final Report Hydrazine Blending and Storage Facility

Wastewater Treatment and Decommissioning Assessment Version 2.2. April

1988. DCN: 198-RII-RT-GBKX

Ebasco Services Inc. Final Phase I Contamination Assessment Report Site 1-7 Hydrazine

Blending and Storage Facility Version 3.2. September 1988. DCN: 198-Rll-RTGNQP

Ebasco Services Inc. Final Phase II Data Addendum Site 1-7 Hydrazine Blending and

Storage Facility Version 3. 1. February 1989. DCN: TES

Harding Lawson Associates (1991a). Draft Final Implementation Document for

Decommissioning (Phase I) Hydrazine Blending and Storage Facility Interim

Response Action. January 7, 199 1. DCN: 7760-009-RT-BNWG

Harding Lawson Associates (1991b). Final Implementation Document for Rinse water

Transfer (Phase II) Hydrazine Blending and Storage Facility Interim Response

Action. November 1991. DCN: 7760-028-RT-BWWJ

Harding Lawson Associates (199 1 c). Amendment to the Final Decision Document for

the IRA at the RMA Hydrazine Blending Storage Facility. August 9, 199 1. DCN:

7760-009-RT-BTWF

Harding Lawson Associates. RMA IRA H Phase II Hydrazine Blending and Storage

Facility. Final Decommissioning Technical Report. November 1992. DCN:

7760-028-RT-CLHX

International Technology Corporation. Decommissioning of Hydrazine Blending and

Storage Facility Final Engineering Report. October 1993. DCN: 7760-040-RTCYKH

US Department of Justice. Federal Facility Agreement and Settlement Agreement to

Ensure the Continued Cleanup of Rocky Mountain Arsenal. February 17, 1989.

Document Control Number: TES

UAWPD0CS\HYDRAZ1N.WPD 10
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LOCATION MAP

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Prepared for:

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Table 1. Summary of Analytical Results for Site 1-7, Page I of I

Concentration fug/g)

DataChem CAL

Number of Standard Detection Detection

Constituent Samples* Range Median** Mean** Deviation** Limit Limit

Volatiles (N-39)

MI9K 1 1 - - - 0.5 0.5

Senivolatiles (M-54)

Dieldrin 1 0.4 0.3 0.3

1CP Metals IN-54)

Cadmium 1 1.7 - - - 0.74 0.66

Chromium 39 8.1-27 13 14 4.4 6.5 5.2

Copper 52 5.8-81 14 22 16 4.7 4.9

Lead 29 11-130 17 25 28 0.4 13

Zinc 53 24-150 60 68 32 8.7 9.5

HydrazLnes (N-54)

None detected

r-3

ko Mitrosamiiies (R-54)

None detected

Dibromochloropropane (Ho54)

None detected

Arsenic (H-54) 5 3.1-12 3.4 5.2 3.4 2.5 5.0

Mercury (Nw54) 2 0.086-0.092 - - - 0.050 0.060

N - Number of samples analyzed

- Number of samples In which constituent was detectedl only these samples'were used In statistical analyses

- Median, mean, and standard deviation not calculated when constituent detected In fewer than 5 samples

Site 1-7

5244A/1142A

TV... Q/P/AA
Table 2. Summary of Analytical Results for Site 1-7. Phase 11. Page 1 of 1

Concentratinn (ag/r)

DataChem CAL

Number of Standard Detection Detectim

Constituent Samples* Range me"** Mean" Deviation" Limit Limit

Volatiles (N:i 11

None detected

Volatile enated Cominunds (N 11)

None detected

Semiyglatiles (N = 34)

Diekbin 2 1-5 0.3 0.3

Pihl1O9&bknU== (N = 21

None detected

Qaamlhlorine Pestickks (N

Aldrip 2 0.002-0.01 0.002

Hexac. -brocycilopentadiene I o.M - - - 0.002 -

Dieldr,'4i 1 0.5 - - - 0.003 -

Endrin 1 0.02 - - - 0.006 -

1sodrin 1 0.003 - - - 0.001 -

DichlorodiplItenylethane 1 0.01 - - - 0.002 -

DiclýL'6rodiphenyltrichllonxdme 1 0.02 - - - 0.002 -

Qrgm'm=n Compaun&q (N = 561

None detected

Q131111=11fur-Commods (N 12)

Nonedletected

1CP MemLt-aLmM

Caftium 4 IA-3.8 - - - 0.74 0.66

Chromium 25 11-27 19 19 4.6 6.5 5.2

Copper 18 7.1-95 13 20 20 4.7 4.9

LAW 11 12-140 27 42 37 8.4 13

Zinc 26 30-630 60 130 180 8.7 9.5

Arsenic fN = It) 4 3A-20 - - - 2.5 5.0

MercLia (N = 21 1 0.083 0.050 0.060

N - Number of samples analyzed

W Number of samples In which constituent was detected; only these samples were used In statistical analyses.

W Median, mean, and standard deviation not calculated when constituent detected In fewer than 5 samples.

1-7-11.1 Summary/Task 20/Rov. 2113/89
Table 3. Interim Response Action H Analytical Program Summary

Certified Reporting Decision Document Technology- based

Method Method Limit Action Level Action Level

Analyte Development !Qertification (Ag/1) (UP,/I)

NDMA Yes Yes 0.042 TBD

Hydrazine Yes Yes 9.9 2.5 9.9

MMH Yes Yes 7.5 20 7.5

UDMH Yes Yes 25 25 25

pg/I micrograms per liter

NDMA = N-nitrosodimethylamine

MMH = monomethyl hydrazine

UDMH = unsymmetrical dimethyl hydrazine

TBD = to be determined

11792,640 - TR

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