08-Phillips_Army_Airfield_Sampling_and_Analysis_Plan_2011-08.pdf_(Attachment_2).pdf

Sampling and Analysis Plan for the Phillips Army Airfield Rubble Landfill

Methane and Groundwater Monitoring Program

Aberdeen Area Aberdeen Proving Ground, Maryland

Prepared for:

Directorate of Public Works Environmental Division U.S. Army Garrison Aberdeen Proving Ground, Maryland 21005

Prepared by:

EA Engineering, Science, and Technology, Inc.

1319 Woodbridge Station Way Edgewood, Maryland 21040

August 2011

DISTRIBUTION RESTRICTION

STATEMENT APPROVED FOR PUBLIC RELEASE:

DISTRIBUTION IS UNLIMITED

# 10770-A-7

Intentionally Left Blank i

CONTENTS

1.0 INTRODUCTION

1.1 Site Background

1.2 Objective

2.0 METHANE SAMPLING AND ANALYSIS

2.1 Monitoring Frequency and Sample Locations

2.2 Health and Safety

2.3 Equipment and Materials

2.4 Soil Gas Sampling Procedures

2.4.1 Calibration

2.4.2 Physical Inspection and Observation

2.4.3 Obtaining a Measurement

2.4.4 Documentation

2.5 Reporting Exceedances

3.0 GROUNDWATER SAMPLING

3.1 Monitoring Frequency and Sample Locations

3.2 Health and Safety

3.3 Quality Assurance/Quality Control

3.3.1 Record Keeping and Labeling

3.3.3 Quality Control Samples

3.3.4 Sample Delivery and Chain of Custody

3.3.5 Laboratory Quality Assurance and Quality Control

3.4 Analytical Parameters, Methods, and Preservatives

3.5 Equipment and Materials

3.6 Groundwater Gauging and Sampling Procedures

3.6.1 Groundwater Gauging

3.6.2 Well Purging

3.6.3 Well Sampling

3.6.4 Decontamination Procedures

3.7 Reporting Exceedances

3.8 Additional Monitoring and Recordkeeping

4.0 ANNUAL REPORTING

5.0 REFERENCES

APPENDIX A. MDE Letter, 23 June 2011 ii

LIST OF FIGURES

Figure 1 Site Map Figure 2 Methane Monitoring Points Figure 3 Groundwater Monitoring Wells

LIST OF TABLES

Table 1 Required Monitoring Parameters for VOCs Table 2 Required Monitoring Parameters for Elements and General Chemistry Table 3 Groundwater Sampling and Analysis Guidance for the PAAF Rubble

Landfill

LIST OF ACRONYMS AND ABBREVIATIONS

APG .......................................................................................... Aberdeen Proving Ground ASTM ............................................................ American Society for Testing and Materials CLP ..................................................................................... Contract Laboratory Program COC ....................................................................................................... Chain of Custody DPW-ED ......................................... Directorate of Public Works – Environmental Division EA ........................................................... EA Engineering, Science, and Technology, Inc.

GP ........................................................................................ General Physics Corporation LEL .................................................................................................. Lower Explosive Limit MCL ..................................................................................... Maximum Contaminant Level MDE ................................................................. Maryland Department of the Environment mL ......................................................................................................................... Milliliter PAAF ........................................................................ Phillips Army Airfield Rubble Landfill ppb ........................................................................................................... Parts per Billion ppm .......................................................................................................... Parts per Million PQL ......................................................................................... Practical Quantitation Limit SOP ................................................................................... Standard Operating Procedure USEPA ................................................................. U.S. Environmental Protection Agency VOC ....................................................................................... Volatile Organic Compound °C .............................................................................................................. Degree Celsius

1.0 INTRODUCTION

EA Engineering, Science, and Technology, Inc. (EA) has been contracted by the Aberdeen Proving Ground (APG) Directorate of Public Works, Environmental Division (DPW-ED) to perform groundwater and methane monitoring at the Phillips Army Airfield (PAAF) Rubble Landfill within the Aberdeen Area of APG, Maryland (Figure 1).

This updated monitoring plan describes the groundwater and landfill gas monitoring requirements for the PAAF Rubble landfill. The monitoring plan has been developed in accordance with the groundwater discharge permit (MDE Groundwater Discharge Permit No.

2009-GWD-3049 issued 29 March 2010) and further guidance provided by the Maryland Department of the Environment (MDE) in a letter dated 23 June 2011 (Appendix A).

1.1 Site Background

The PAAF Rubble Landfill is located in the Aberdeen Area of APG north of the Phillips Army Airfield. Disposal operations began in 1971, and the landfill was closed in June 2001. Waste accepted at the landfill included concrete, brick, stone, metal, asphalt, plastic, and other construction and land clearing debris. The PAAF Rubble Landfill permit specifically prohibited the disposal of controlled hazardous substances, waste containing free liquids, infectious waste, radioactive materials, animal carcasses, chemical/petroleum oil lubricant spill cleanup material, and drums or tanks unless they were empty and crushed. Final closure of the landfill began in March 2001 and the final walk-through and approval by MDE representatives took place on 7 June 2002 (GP 2009).

A monitoring program has been implemented for the PAAF Rubble Landfill site. The monitoring program includes groundwater well gauging to determine groundwater elevations, methane monitoring, and groundwater sampling to monitor groundwater quality. Monitoring was previously conducted under the Sampling and Analysis Plan for the Phillips Army Airfield and Westwood Rubble Landfill Groundwater Monitoring Program (GP 2005) and the Methane

Monitoring Plan for the Phillips Army Airfield Rubble Landfill and the Westwood Rubble

Landfill (GP 2006).

General Physics Corporation (GP) installed five permanent methane monitoring points on the perimeter of the PAAF Rubble Landfill and four points to the southwest of the landfill to facilitate methane monitoring (Figure 2). The methane monitoring points were installed to a depth of 22 to 24 inches, which is the maximum depth of the magnetometer sweeps for unexploded ordnance (GP 2008). At this depth, dilution of methane gas due to ambient air penetrating the soil is minimized. The locations of groundwater monitoring wells at the site are shown on Figure 3.

1.2 Objective

This monitoring plan describes the procedures for conducting methane and groundwater monitoring at the PAAF Rubble Landfill and replaces the previous monitoring plans (GP 2005, GP 2006). Changes to the previous monitoring plans have been made in accordance with the letter from MDE to APG dated 23 June 2011.

The objective of the methane gas monitoring program at the PAAF Rubble Landfill is to minimize the potential risks of methane gas generation and migration from the landfill into facility structures and across the landfill boundary. The specific procedures for methane monitoring are described in Section 2.

Groundwater monitoring is conducted at the PAAF Rubble Landfill in accordance with the groundwater discharge permit (MDE No. 2009-GWD-3049) in order to evaluate groundwater trends and to ensure that contaminants are not migrating to waters of the State. The specific procedures for groundwater monitoring are described in Section 3.

2.0 METHANE SAMPLING AND ANALYSIS

2.1 Monitoring Frequency and Sample Locations

Soil gas at the PAAF Rubble Landfill will be monitored quarterly at monitoring points PM-01 through PM-09 (Figure 2). The methane monitoring results will be presented to MDE in annual reports.

2.2 Health and Safety

Level D protective clothing shall be used by sampling personnel. Latex gloves and work boots shall be worn by sampling personnel in accordance with the health and safety plan. Non-sparking tools will be used.

Please refer to the site specific health and safety plan for site specific information and requirements. The monitoring technician will adhere to the following health and safety procedures while conducting methane monitoring. Landfill gas, when combined with air, can be explosive and may contain toxic constituents such as vinyl chloride and hydrogen sulfide. The monitoring technician must:

Ensure gas monitoring equipment is properly operating and calibrated prior to use;

Never smoke around the gas probes;

Always stand upwind when opening or monitoring the gas probes and never stand directly over probes; and Never enter a confined space or basement where landfill gas might be present without following confined space entry procedures.

2.3 Equipment and Materials

Methane monitoring will be performed utilizing a Landtec GEM 2000 portable gas analyzer or equivalent. The instrument is intrinsically safe and is specifically designed to monitor landfill gas. This instrument is an all-weather, self-contained portable monitor, which has an infrared gas analyzer and an internal sample pump capable of drawing a gas sample at up to 80 inches of vacuum. This monitoring device automatically samples and analyzes methane, carbon dioxide, oxygen, and static pressure. The instrument is capable of recording the gas composition by percent volume of methane, carbon dioxide, oxygen, and balance gas.

The following materials may be required:

Landtec GEM 2000 Gas Analyzer, or equivalent Indelible ink ballpoint pens Site map with monitoring locations Field Forms Site Keys – Gate, probe, etc.

Hand-held knife or multi-tool Extra Locks Bolt Cutters Small tool box

2.4 Soil Gas Sampling Procedures

The general procedure consists of calibrating the gas analyzer prior to use, purging the probe prior to measurement, maintaining a field logbook, and documenting all measurements. During all field activities, procedures outlined in this plan will be used to ensure that all data is representative of the existing soil gas conditions at each of the landfills. Qualified personnel will perform the sampling and thoroughly document all activities.

2.4.1 Calibration

Prior to initiating each monitoring event, the gas indicator equipment must be calibrated per the manufacturer’s recommended procedures. For the GEM 2000, calibration gases containing 50 percent methane, 35 percent carbon dioxide, and 4 percent oxygen are required. All manufacturer recommended safety procedures are to be followed when calibrating the monitoring equipment.

2.4.2 Physical Inspection and Observation

Upon arrival at each gas monitoring probe, the condition of the probe and surrounding area will be noted on the appropriate field form. This will include, but should not be limited to security, evidence of tampering, evidence of physical damage, probe integrity, evidence of breakage or heaving of the concrete pad, if present, and evidence of surface infiltration.

2.4.3 Obtaining a Measurement

The GEM should be turned on and barometric pressure should be recorded. First, the probe pressure will be obtained by attaching one end of a rubber hose or Teflon tubing to the monitoring instrument sampling port and the other end of the hose or tubing to the probe quick connect or sampling fitting. Static pressure should always be recorded prior to any purging or sampling of landfill gas at the desired sampling point.

Prior to sample acquisition and gas measurement, it is necessary to purge each probe. This is performed to help ensure that the gas present in the probe is evacuated and a representative gas sample is pulled through the perforated zone and the gravel pack encasing the perforated probe pipe. The purging process usually occurs for two probe volumes and is complete once stabilized readings are shown on the instrument screen. While evaluating methane, record and observe both maximum and stabilized readings.

After monitoring occurs at each gas probe, the probe should be resealed and should remain sealed until monitoring occurs again.

2.4.4 Documentation

The measurements to be documented at each sampling location during methane monitoring are as follows:

Monitoring location name Methane concentration Relative humidity Precipitation Atmospheric pressure Downhole pressure Ground surface conditions

These data will be provided to MDE in annual reports.

2.5 Reporting Exceedances

MDE must be notified if the concentration of methane at any sampling location is greater than the action level, which is 25 percent of the Lower Explosive Limit (LEL). The LEL for methane is 5 percent concentration in air, so the action level (25 percent of the LEL) is a 1.25 percent concentration in air which is equivalent to 12,500 parts per million (ppm) methane.

3.0 GROUNDWATER SAMPLING

3.1 Monitoring Frequency and Sample Locations

Groundwater elevations at the PAAF Rubble Landfill will be measured quarterly. Groundwater samples will be collected annually at six monitoring wells: PW-11, PW-12, PW-16, PW-17, PW-19, and PW-20 (Figure 3). Monitoring wells PW-9, PW-10, PW-13, PW-24, PW-25, and PW-26, which were sampled in the past, will be discontinued from the monitoring program and will be abandoned after approval of a separate well closure plan.

The annual groundwater sampling will be conducted in October. Sampling has historically been conducted in October at the PAAF Rubble Landfill when groundwater table conditions are low.

3.2 Health and Safety

Level D protective clothing shall be used by sampling personnel. Latex gloves and work boots shall be worn by sampling personnel in accordance with the health and safety plan. Please refer to the site specific health and safety plan for site specific information and requirements.

3.3 Quality Assurance/Quality Control

During all field activities, procedures outlined in this plan will be used to ensure that all data generated is representative of the existing groundwater conditions at the PAAF Rubble Landfill.

Qualified personnel will be utilized at all times to perform sampling, and all activities will be thoroughly documented.

3.3.1 Record Keeping and Labeling

All information pertinent to the field sampling shall be recorded in a field logbook. Entries shall include:

Sample location, sample designation Time, date Team members Well depth, water level measurements Purge volume calculations and flow rate Equipment notes Number and size of samples taken, including duplicate samples Field observations, including weather conditions Field pH, specific conductivity, temperature, turbidity, oxidation/reduction potential, and dissolved oxygen after initial purge and immediately prior to sampling Observations and/or additional comments

For specific information on groundwater record keeping requirements, see APG Standard Operating Procedure (SOP) 016, “Surface Water, Groundwater, and Soil/Sediment Field Logbooks” (APG 1993; also refer to the former groundwater monitoring plan [GP 2005, Appendix A], for copies of the applicable SOPs). For general record keeping information, see APG SOP 003, “Field Logbook”.

A sample label shall be affixed to each sample container at the time of collection. Sample labels shall indicate the name(s) of the sampler(s), the sample number/designation, the date and time the sample was taken, preservative (if any), and all analyses to be run on the sample. For additional information regarding labeling, see APG SOP 001, “Sample Labels”.

3.3.3 Quality Control Samples

Trip and Rinseate Blanks

One trip blank per vehicle (or sampling team) shall be prepared for each day of sampling. The trip blank shall be prepared in the laboratory by filling a 40 milliliter (mL) glass vial with Type II water as established by the American Society for Testing and Materials (ASTM). The blank shall be subject to the same packaging and storage conditions as the groundwater samples and shall remain unopened; see APG SOP 004, “Sample Packaging and Shipping”. Each trip blank shall be analyzed for volatile organic compounds (VOCs) by the laboratory.

One rinseate blank sample shall be prepared per every ten samples to ensure that the sampling equipment is effectively cleaned, thereby eliminating cross contamination between monitoring wells. The rinseate blanks shall be collected after the final rinse in the decontamination procedure, see Section 3.6.4 and APG SOP 005, “Decontamination”. The procedure for collecting rinseate blanks involves filling the sampling device with ASTM Type II water and emptying it into the sample containers. The rinseate blanks shall be delivered to the laboratory and analyzed for each of the parameters for which groundwater monitoring is performed.

Duplicates

One duplicate per every ten samples shall be collected and analyzed for each of the parameters for which groundwater monitoring is performed.

3.3.4 Sample Delivery and Chain of Custody

Once groundwater samples are collected, properly labeled, and preserved if required, they are placed in coolers with ice or freeze packs immediately following collection, and cooled to 4 degrees Celsius (°C). For sample packing and shipping procedures, see APG SOP 004, “Sample Packing and Shipping”. Samples and chain of custody (COC) form(s) will be delivered to the laboratory on the same day they are collected by sample team members, a laboratory representative, or overnight delivery on a commercial carrier service. Samples shall not be held on site for more than 24 hours following collection so as not to exceed holding times for any of the analytical parameters.

The COC form shall accompany the samples at all times. The COC must be completed and signed by a member of the sampling team at the time of collection and then signed each time the samples are transferred to a different responsible party. The Analysis Request section of the COC must be completed for each sample collected, as well as trip blanks, rinseate blanks, and duplicates. The completed COC form is included with the sample for delivery to the laboratory.

For detailed procedures for completing the COC/Analysis Request Form, see APG SOP 002, “Chain-of-Custody Form”.

3.3.5 Laboratory Quality Assurance and Quality Control

Sample analysis will be performed at a qualified independent laboratory certified for water quality analysis by the Department of Health and Mental Hygiene.

All quality assurance/quality control shall be performed by the analytical laboratory by following comprehensive in-house laboratory quality control procedures that encompass typical Contract Laboratory Program (CLP) protocols and separate quality control procedures outlined in the specific analytical methodologies. These procedures shall be regularly audited by the U.S.

Environmental Protection Agency (USEPA) and in-house quality control check samples for required analytical parameters. Analytical methodologies shall be in accordance with current USEPA protocols and quality control protocols including:

Samples shall be spiked with a measured amount of contaminant and analyzed. Spiked samples ensure that sample matrix effects do not adversely affect analytical quantitation.

Matrix spikes shall be analyzed at a minimum of 1 per 20 samples.

Matrix duplicates shall be analyzed at a minimum of 1 per 20 samples.

Laboratory blanks shall be analyzed to ensure that samples are not being contaminated during the analysis process. Laboratory blanks shall be analyzed at a minimum of 1 per analytical batch.

Laboratory control samples shall consist of independently made standards that are analyzed with each batch of samples.

Additionally, the selected laboratory will be responsible for periodically calibrating and performing maintenance procedures on all monitoring and analytical instrumentation to insure accuracy of measurements.

For each sample taken, the laboratory will record the date(s) and times the analyses were performed and the person(s) who performed the analyses.

The quality assurance and quality control procedures shall ensure that laboratory detection limits are within the practical quantitation limit (PQL) for each analyte. The PQL represents the lowest concentration of a chemical that can be accurately and reproducibly quantified by an analytical instrument or method. PQLs for individual analytes are provided in Tables 1 and 2.

Furthermore, the laboratory must report all analytical results that are below the PQL but that can be estimated. These results are “J” qualified to indicate an estimated value.

3.4 Analytical Parameters, Methods, and Preservatives

The groundwater at the PAAF Rubble Landfill shall be sampled for the specific analytical parameters listed in Tables 1 and 2. Table 3 provides further information for sampling including preservative requirements and the laboratory analytical methods to be used. The analytical parameters listed are those required by the groundwater discharge permit for the PAAF Rubble Landfill.

For techniques employed in preserving groundwater samples and the appropriate preservatives, see APG SOP 039, “Sample Preservation and Container Requirements”.

3.5 Equipment and Materials

The following equipment may be required for groundwater sampling:

Electronic water level indicator YSI water quality meter with flow-through cell, or equivalent Grundfos low-flow pump Peristaltic pump Control box for pump Portable generator Extension cords Plastic sheeting 5-gallon buckets

Polyethylene tubing Sample containers and preservatives Ice and coolers for sample storage Laboratory Chain-of-Custody Clear Tape Cellular phone and/or field radios Keys for Well Locks Field Logbook, Calculator, Watch Black Sharpie Marker Pen

The following materials may be required for decontamination of sampling equipment:

Liqui-Nox or Alconox detergent Scrub brush Plastic garbage bags Paper towels Deionized water

3.6 Groundwater Gauging and Sampling Procedures

3.6.1 Groundwater Gauging

All elevation measurements shall be taken prior to performing any activities that may disturb the water level, such as well purging or aquifer testing. The detection probe and measurement tape shall be decontaminated after every water level reading by triple rinsing with deionized water.

For specific procedural information, see APG SOP 010, “Water Level and Well-Depth Measurements.”

3.6.2 Well Purging

Each well shall be purged no more than twenty-four hours prior to sampling to ensure a representative groundwater sample. Depth-to-bottom and depth-to-water surface measurements shall be collected immediately before purging. For general well purging procedures, see APG SOP 013, “Collection of Monitoring Well Samples.” Each well will be purged of stagnant water to obtain three casing volumes of groundwater prior to sample collection to ensure the sample represents the screened portion of the aquifer. The depth measurements to the bottom of the well and to the water surface will be used to obtain and calculate casing volumes for purging. The following calculation will be performed to determine the appropriate volume of water to be removed:

Casing Volume (gallons) = 0.65 × (H – hw) for a 4-inch well = 0.16 × (H – hw) for a 2-inch well

Purge Volume (gallons) = 3 × (Casing Volume) Where:

H = total depth (feet) hw = depth to water (feet)

A set of field parameters will be monitored at the beginning of purging activities and when purging is complete, including temperature (APG SOP 009), specific conductivity (APG SOP 012), pH (APG SOP 006), turbidity (APG SOP 036), oxidation-reduction potential (APG SOP 038), and dissolved oxygen (APG SOP 037).

3.6.3 Well Sampling

Well sampling shall be conducted within 24 hours after well purging is completed. For groundwater well sampling procedures, see APG SOP 010, “Collection of Monitoring Well Samples”. A stainless steel pump head or bailer shall be used to sample the wells. Care shall be taken at all times to minimize sample agitation and atmospheric contact during sampling.

Samples shall be collected in the following order from the PAAF Rubble Landfill monitoring wells:

1. VOCs

2. Metals

3. Chemical oxygen demand, hardness, and nitrate

4. Alkalinity, chloride, specific conductance, and sulfate

5. pH, turbidity, and total dissolved solids

6. Ammonia

General Procedures

Plastic sheeting or tables shall be used at each sampling site for the staging of clean sampling equipment.

Pump heads shall be lowered slowly into the wells to minimize agitation. Bailers shall be used in place of pump heads if deemed necessary.

All field parameters shall be measured immediately after purging is initiated and prior to sampling.

Field instruments shall be calibrated prior to each daily sampling event, and during sampling as required, according to manufacturer specifications.

All samples shall be placed on ice in a cooler immediately after collection.

All sample equipment shall be decontaminated prior to sampling each well.

VOCs Sampling Procedures

Sample water will be poured slowly into each of three 40 milliliter (mL) vials using care not to agitate or cause bubbles to form in the container (if using bailers, VOC stopcocks shall be used).

The vial shall be filled to the top creating a convex meniscus.

The vial shall be securely closed with a Teflon-lined septum cap.

The vial shall be inverted and tapped against the palm of the hand and inspected for air bubbles.

If no air bubbles are found, the sample is satisfactory.

If air bubbles are found, the sample shall be disposed and the procedure repeated.

Metals Sampling Procedures

The one-liter sample for metals shall be collected without filtering, for analysis of total metals.

The sample container shall then be preserved with nitric acid and placed into the cooler.

3.6.4 Decontamination Procedures

All sampling equipment shall be decontaminated before daily groundwater sampling commences.

Sampling equipment shall be decontaminated prior to sampling each well.

For decontamination procedures for specific equipment, see APG SOP 005, “Decontamination”.

3.7 Reporting Exceedances

A qualified professional will evaluate the results of the analyses and determine if any State or Federal Maximum Contaminant Level (MCL), Action Level or other health standard was exceeded. If an exceedance is determined for the first time for any of the samples collected, MDE will be notified within 24 hours of receipt of the analytical data detecting the occurrence.

Thereafter, if there are any significant increases above the MCL, Action Level or other health standard, MDE will be notified within 24 hours of receipt of the analytical data detecting the occurrence.

Upon detection of an exceedance of an MCL, Action Level or other health standard for the first time, the monitoring point(s) in which the standard was exceeded will be immediately resampled to verify the initial detection. This resampling will occur as soon as possible, and no later than 30 days following the notification of the exceedance by the analytical laboratory performing the analysis.

3.8 Additional Monitoring and Recordkeeping

If any pollutant is monitored at the locations more frequently than specified by the PAAF Rubble Landfill discharge permit, using approved analytical methods, the results of such monitoring shall be reported to MDE.

All records and information resulting from the monitoring activities required by this permit, including all records of analyses performed and calibration and maintenance of instrumentation will be retained for a minimum of three years.

4.0 ANNUAL REPORTING

An annual written report will be submitted to MDE within 90 days of the close of every third calendar quarter to include all results of the quarterly methane monitoring, quarterly groundwater elevation gauging, and annual groundwater sampling.

The annual report shall contain a summary and interpretive discussion of all analyses. The annual report shall also include historical data for both groundwater and methane monitoring data for comparative purposes. All data for each sampling location will be summarized and presented in time series format.

5.0 REFERENCES

Aberdeen Proving Ground, (APG 1993). Standard Operating Procedures.

General Physics Corporation, (GP 2005). Sampling and Analysis Plan for the Phillips Army

Airfield and Westwood Rubble Landfill Groundwater Monitoring Program. May.

General Physics Corporation, (GP 2006). Methane Monitoring Plan for the Phillips Army

Airfield Rubble Landfill and the Westwood Rubble Landfill. July.

General Physics Corporation, (GP 2008). 2008 Annual Groundwater Monitoring Program

Report for the Phillips Rubble Landfill, Aberdeen Proving Ground. December.

General Physics Corporation, (GP 2009). 2009 Annual Groundwater Monitoring Program

Report for the Phillips Rubble Landfill, Aberdeen Proving Ground. December.

FIGURES

Phillips Field Rd

Airbase Loop Rd

Maryland Blvd

Boothby Hill Ave o Figure 1Figure 1 Site MapSite Map

A b e r d e e n P r o v i n g G r o u n dA b e r d e e n P r o v i n g G r o u n d P h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e aP h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e a

\\E dg ew oo dfp \pr oje cts

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Area Shown in Main Map

Legend Landfill Boundary Building Intermittent Drainage Roads Aberdeen Proving Ground

EA Engineering, Science, and Technology, Inc.

Phillips Field Rd

Airbase Loop Rd

Maryland Blvd

Boothby Hill Ave

PM-01 PM-02

PM-03

PM-04

PM-05

PM-06

PM-07

PM-09

PM-08

o Figure 2Figure 2

Methane Monitoring PointsMethane Monitoring Points A b e r d e e n P r o v i n g G r o u n dA b e r d e e n P r o v i n g G r o u n d P h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e aP h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e a

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0 800400 Feet

Area Shown in Main Map

Legend

Methane Monitoring Point Landfill Boundary Building Intermittent Drainage Roads Aberdeen Proving Ground

EA Engineering, Phillips Field Rd

Airbase Loop Rd

Maryland Blvd

Boothby Hill AvePW-25

PW-20

PW-16

PW-19

PW-09

PW-11

PW-24

PW-17

PW-26

PW-13PW-12

PW-10

o Figure 3Figure 3

Groundwater Monitoring WellsGroundwater Monitoring Wells A b e r d e e n P r o v i n g G r o u n dA b e r d e e n P r o v i n g G r o u n d P h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e aP h i l l i p s R u b b l e L a n d f i l l , A b e r d e e n A r e a

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Area Shown in Main Map

Legend

Groundwater Monitoring Well

Groundwater Monitoring Well (monitoring discontinued) Landfill Boundary Building Intermittent Drainage Roads Aberdeen Proving Ground

EA Engineering, TABLES

Table 1. Required Monitoring Parameters for VOCs

Volatile Organic Chemicals PQL (ppb)

Acetone 5.0 Acrylonitrile 5.0 Benzene 1.0 Bromochloromethane 1.0 Bromodichloromethane 1.0 Bromoform 1.0 Bromomethane 1.0 2-Butanone 5.0 Carbon disulfide 1.0 Carbon tetrachloride 1.0 Chlorobenzene 1.0 Chloroethane 1.0 Chloroform 1.0 Chloromethane 1.0 Dibromochloromethane 1.0 1,2-Dibromo-3-chloropropane 1.0 1,2-Dibromoethane (EDB) 1.0 Dibromomethane 1.0 1,2-Dichlorobenzene 1.0 1,4-Dichlorobenzene 1.0 Trans-1,4-dichloro-2-butene 5.0 1,1-Dichloroethane 1.0 1,2-Dichloroethane 1.0 1,1-Dichloroethene 1.0 Cis-1,2-Dichloroethene 1.0 Trans-1,2-Dichloroethene 1.0 Methylene chloride 1.0 1,2-Dichloropropane 1.0 Trans-1,3-Dichloropropene 1.0 Cis-1,3-Dichloropropene 1.0 Ethylbenzene 1.0 2-Hexanone 5.0 Iodomethane 1.0 4-Methyl-2-pentanone 5.0 Methyl Tertiary Butyl Ether 2.0 Styrene 1.0 1,1,1,2-Tetrachloroethane 1.0 1,1,2,2-Tetrachloroethane 1.0 Tetrachloroethene 1.0 Toluene 1.0

Table 1. Required Monitoring Parameters for VOCs

Volatile Organic Chemicals PQL (ppb)

1,1,1-Trichloroethane 1.0 1,1,2-Trichloroethane 1.0 Trichloroethene 1.0 Trichlorofluoromethane 1.0 1,2,3-Trichloropropane 1.0 Vinyl acetate 1.0 Vinyl chloride 1.0 Xylene 1.0 ppb – parts per billion

Table 2. Required Monitoring Parameters for Elements and General Chemistry

Elements and Indicator Parameters PQL (ppm)

Total Antimony 0.0020 Total Arsenic 0.0020 Total Barium 0.0100 Total Beryllium 0.0020 Total Cadmium 0.0040 Total Chromium 0.0100 Total Calcium 0.08 Total Cobalt 0.0100 Total Copper 0.0100 Total Iron 0.0050 Total Lead 0.0020 Total Nickel 0.0110 Total Magnesium 0.004 Total Manganese 0.0100 Total Mercury 0.0002 Total Potassium 0.39 Total Selenium 0.035 Total Silver 0.0100 Total Thallium 0.0020 Total Sodium 0.2 Total Vanadium 0.0100 Total Zinc 0.0100 pH 0.1 (SU) Alkalinity 1.000 Hardness 0.500 Chloride 0.390 Specific Conductance 1.000 Nitrate 0.060 Chemical Oxygen Demand 10.00 Turbidity 0.110 (NTU) Ammonia 1.000 Sulfate 0.380 Total Dissolved Solids 10.00 ppm – parts per million

Table 3. Groundwater Sampling and Analysis Guidance for the PAAF Rubble Landfill

PARAMETER PRESERVATIVE

b SAMPLE

CONTAINERS

c

ANALYSIS

Number of GW

Samples

Number of

Duplicates

Number of

Rinseate

Blanks

Number of Trip

Blanks d

Total

Number of

Samples

Analytical

Method

VOCs 4°C 40 mL TLSV 6 1 1 1 9 EPA 624-Modified

Metals HNO3, 4°C 1 L HDPE 6 1 1 0 8

EPA 200.7

(Mercury – EPA 245.1)

Chemical Oxygen Demand H2SO4, 4°C

1 L HDPE

6 1 1 0 8 EPA 410.4

Hardness H2SO4, 4°C 6 1 1 0 8 EPA 130.2 Nitrate H2SO4, 4°C 6 1 1 0 8 EPA 353.2 Alkalinity 4°C

1 L HDPE

6 1 1 0 8 EPA 310.1

Chloride 4°C 6 1 1 0 8 EPA 325.3 Specific Conductance 4°C 6 1 1 0 8 EPA 120.1 Sulfate 4°C 6 1 1 0 8 EPA 375.4 pH 4°C

1 L HDPE

6 1 1 0 8 EPA 150.1

Turbidity 4°C 6 1 1 0 8 EPA 180.1 Total Dissolved Solids 4°C 6 1 1 0 8 EPA 160.1 Ammonia H2SO4, 4°C 1 L HDPE 6 1 1 0 8 EPA 350.3 a The parameters listed in this table are to be analyzed by an approved laboratory.

b HNO3–nitric acid; H2SO4–sulfuric acid c TLSV–Teflon-Lined Septum Vials; AGWM–Amber Glass Wide Mouth; HDPE–High Density Polyurethane d One trip blank is required per vehicle (or sampling team) per day.

APPENDIX A

MDE Letter, 23 June 2011

2.5 Reporting Exceedances