Pages from The Final Amended FINAL GW Monitoring Work Plan March 12 2003-part2.pdf

Groundwater Monitoring Work Plan, Bitterroot Valley Sanitary Landfill

Groundwater in the area generally flows from the Bitterroot Mountains west of the site to the Bitterroot River east of the site. Potentiometric maps in Maxim (2002a) show a general eastward groundwater gradient for the shallow portion of Unit A and the deep portion of Unit A Groundwater flow in Unit D is to the northeast.

There are a few local sources of recharge to the shallow groundwater system within the study area. The North Channel of Bear Creek west of Highway 93 appears to lose flow through the streambed to the shallow groundwater system. This localized source of recharge causes a southwesterly groundwater flow direction in the shallow system near the western end of the landfill. The ephemeral drainage that bisects the eastern portion of the site contains running water for approximately three months each year. Loss of flow from this channel is a seasonal source of recharge to the shallow system.

Small amounts of groundwater appear to discharge to the lower end of the North Channel of Bear Creek. All remaining groundwater within the study area appears to discharge either to the Bitterroot River or the floodplain aquifer associated with it. Groundwater flow in Units A, B, C and D is northeasterly in the eastern end of the site. Groundwater flow in the relatively high transmissivity aquifer associated with the Bitterroot River floodplain, east of the study area is to the north. The northeasterly flow of groundwater near the river reflects the transition as groundwater discharges from the flow system beneath the site into the flood plain aquifer.

Vertical components of groundwater flow are generally downward from the shallow portion of Unit A into the deeper portion of Unit A and Unit B. This is the result of the local sources of recharge discussed above. Vertical gradients in deeper hydrostratigraphic units (Units C and D) are generally upward. This results in an area in the deep portion of Unit A and in Unit B that receives groundwater flow from above and below. Groundwater eventually discharges from the study area to the Bitterroot River and its associated floodplain aquifer system.

3.3 CONTAMINANT TRANSPORT AND DISTRIBUTION

Chloroform is the primary contaminant of concern identified at the landfill (Chen-Northern, 1993a). Waste laboratory chemicals were reportedly disposed of in a pit located near the southwestern corner of the landfill (Figure 2) between 1981 and 1985 (MDEQ files). These waste chemicals are believed to be the primary source of chloroform and VOCs currently detected in groundwater at the landfill. Maxim (1996g) describes the extent and magnitude of chloroform-affected soil in the unsaturated zone and upper eight feet of the saturated zone near the source area. Approximately 75,000 cubic yards of chloroform-affected soil were excavated, treated and replaced during 1993 and 1994.

Several other VOCs besides chloroform have been detected in groundwater from the site including methylene chloride, tetrachloroethene, vinyl chloride, choloroethane, 1-1, dichloroethane, 1,2-dichloroethane, 1,1-dichlorethene, chloromethane, cis-1,2-dichloroethene, trans-1,2-dichloroethene, 1-1-1 trichloroethane, benzene, ethyl benzene, toluene, xylenes, and trichloroethane.

By January 1994, dissolved phase chloroform had migrated as far the Bitterroot River floodplain in the deep portion of Unit A. Vertical upward vertical gradients and the 2nd aquitard have for the most part prevented chloroform from migrating into deeper hydrostratigraphic units.

However, groundwater samples from Unit B monitoring well BR-GW-61D have exhibited detectable chloroform since 1995. BR-GW-61DD is the only one of three wells completed in Unit B that has exhibited detectable chloroform. Drawdown observed in Unit B well BR-GW- 56DD after the initiation of pumping in deep portion Unit B remediation wells R-4D, R-6D and R-8D along Meridian Road indicates that the 2nd aquitard is leaky or has gaps in it in that area.

Dissolved chloroform is thought to have migrated to Unit B through these gaps in the aquitard.

Chloroform concentrations in groundwater in both the shallow and deep portions of Unit A between 1994 and 2002 upgradient of Highway 93 have generally declined as a result of remedial actions taken by NIH. Phase I remediation included the excavation and treatment of VOC affected soil in the source area during 1993 and 1994 (Maxim 1996) and seasonal pumping and treating in wells R-1 and R-2 between 1994 and 1997. The Phase IIA remediation system installed in 1998 consists of pumping and treating groundwater from recovery wells R-1 and R-2 and Meridian Road interception wells R-3S through R-8D (Maxim 1999a). Recovery well R-9D was installed in January 2000 and after thorough testing, it was incorporated into the Phase IIA system in March 2000 (Maxim 2000g).

Graphs of chloroform concentration versus time for several wells presented on Figure 8 (Maxim 2002c) demonstrate improvements in groundwater quality resulting from remedial actions.

Phase I remediation in the source area resulted in up to a two order of magnitude decline in chloroform concentrations in shallow Unit A wells just downgradient of the source area by 1995.

Since 1998, chloroform concentrations detected in well BR-GW-82D have declined almost two orders of magnitude demonstrating that the Phase IIA remediation system is effectively capturing the chloroform plume near Meridian Road. Since well R-9D was added to the Phase IIA system in March 2000, chloroform concentrations in well BR-GW-36D in the deep portion of Unit A have declined by an order of magnitude.

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n c e n tr a ti o n μ g /L

BR-GW-51D

1,000

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce nt ra tio n μ g /L

BR-GW-41S

Data from well GW-58S

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce n tr a tio n (μ g /L

BR-GW-31D

1,000

1,200

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce nt ra tio n μ g /L

BR-GW-82D

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce n tr a tio n μ g /L

BR-GW-2

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C hl or of or m

C on ce nt ra tio n (μ g/ L)

BR-GW-51D

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce n tr a tio n μ g /L

BR-GW-34D

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C hl or of or m

C on ce nt ra tio n (μ g/ L)

BR-GW-61DD

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C hl or of or m

C on ce nt ra tio n (μ g/ L)

BR-GW-9

1,000

1,200

1,400

1,600

1,800

2,000

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C hl or of or m

C on ce nt ra tio n (μ g/ L)

R-9D

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o nc en tr at io n

(μ g

/L

R-1

BR-GW-48S

1,000

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C hl o ro fo rm

C o nc en tr at io n

(μ g

/L

BR-GW-37S

1,000

'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09

C h lo ro fo rm

C o n ce n tr a tio n μ g /L

William.Craig Sticky Note updated through October 2008

4.0 REFERENCES

Camp, Dresser, and McKee (CDM). 1994. Risk Assessment, Bitterroot Valley Sanitary Landfill, Final Review Draft. Prepared for Montana Department of Health and Environmental Sciences. March.

Chen-Northern, Inc. 1989a. Phase I Hydrogeological Investigation at the Bitterroot Valley Sanitary Landfill, Victor, Montana. Prepared for Mr. Charles Mann.

__. 1989b. Data Summary Report, Groundwater Monitoring at the Bitterroot Valley Sanitary Landfill, Victor, Montana. Prepared for Mr. Charles Mann.

__. 1992. Quality Control Manual: Analytical Services. June.

__. 1993a. Hydrogeologic Characterization of the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. Unpublished report for National Institutes of Health and Rocky Mountain Laboratories. February.

__. 1993b. Data Summary Report (October - December 1992), Hydrogeologic Investigation of the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. Prepared for the National Institutes of Health. February.

__. 1993c. Work Plan to Complete Interim Remediation, a Remedial Feasibility Study, and Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. April.

__. 1993d. Final Historic Waste Disposal Pit Investigation, Interim Remedial Action Field Investigation, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. Prepared for the National Institutes of Health. October.

__. 1993e. Final Work Plan to Complete Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. Prepared for the National Institutes of Health. December.

__. 1994a. Final Technical Report on the Data Gaps Field Investigation, Feasibility Study, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. Prepared for the National Institutes of Health. January.

Ecology and Environment, Inc. 1991. Final Listing Site Inspection Report for the Bitterroot Valley Sanitary Landfill, Victor, Montana. Report issued to USEPA Region VIII.

Finstick, S. 1986. Hydrogeology of the Victor and Bin Quadrangle, Bitterroot Valley, Montana.

University of Montana Master’s Thesis.

Huntingdon. 1994a. Data Summary Report (January - April 1994), Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. May.

__. 1994b. Data Summary Report (July 1994), Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. October.

__. 1994c. Groundwater Modeling Report, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December 30.

__. 1995a. Fourth Quarter 1994 Monitoring Report, Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. January.

__. 1995b. Data Summary Report (January 1995), Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. May.

__. 1995c. Additional Hydrogeological Investigation Report, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

Jones, D. 1975. EVT-Pollution and Waste Management Report, Victor Sanitary Landfill Site

Evaluation. U.S. Department of Agriculture, Soil Conservation Service. unpublished.

Mann, C., 1989-1992. Bitterroot Valley Sanitary Landfill, Inc., personal communication with Chen-Northern, Inc. personnel.

Maxim Technologies, Inc.® (Maxim). 1995. Data Summary Report (July 1995), Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1996a. Data Summary Report (January 1996), Groundwater Monitoring and Modeling at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 1996b. Draft Bitterroot Valley Sanitary Landfill, Interim Remedial Action, Soil Removal and Treatment, Construction Oversight Report. July.

__. 1996c. Quarterly Report, Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. August.

__. 1996d. Final, Work Plan to Complete Groundwater Monitoring at the Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1996e. Quarterly Report (July 1996), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1996f. Quarterly Report (September 1996), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1996g. Interim Remedial Action Soil Removal and Treatment Construction Oversight Report, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1997a. Quarterly Report (January 1997), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 1997b. Quarterly Report (July 1997), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. September.

__. 1997c. Quarterly Report (September 1997), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 1998a. Semiannual Report (January/February 1998), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 1998b. Operation, Maintenance and Monitoring Plan, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. June.

__. 1998c. Semiannual Report (July 1998), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. October.

__. 1998c. Draft Groundwater Model Redesign and Calibration, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. February.

__. 1998d. Predesign and Design Report, Phase IIA Groundwater Remediation, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. July.

__. 1998e. Construction Oversight Report, Bitterroot Valley Sanitary Landfill, Alternative Water Supply Project. August.

__. 1999a. Construction Oversight Report Phase IIA Groundwater Remediation System Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. February.

__. 1999b. Work Plan for Source Area Characterization and Laboratory Bench Testing Phase IIB Groundwater Remediation, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. February.

__. 1999c. Summary of Results, Phase IIB Source Area Characterization, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. April.

__. 1999d. Semiannual Report (January 1999), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. April.

__. 1999e. Semiannual Report (July 1999), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. November.

__. 1999f. Construction Oversight Report, Well BR-GW-84D, 118 Westview Drive, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

__. 2000a. Fourth Quarter 1999 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 2000b. Semiannual Report (January 2000), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. April.

__. 2000c. First Quarter 2000 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. May.

__. 2000d. Construction Report, Monitoring Wells BR-GW-85 through BR-GW-89S, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. May.

__. 2000e. Second Quarter 2000 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. July.

__. 2000f. Third Quarter 2000 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. November.

__. 2000g. Construction and System Startup Report, Expansion of Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana.

November.

__. 2001a. Fourth Quarter 2000 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. February.

__. 2001b. Construction Report, Monitoring Wells BR-GW-90D through BR-GW-92D, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 2001c. Semiannual Report (January/February), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. May.

__. 2001d. First Quarter 2001 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. June.

__. 2002a. Semiannual Report (January), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 2002b. Fourth Quarter 2001 Monitoring Report, Phase IIA Groundwater Remediation System, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. March.

__. 2002c. Semiannual Report (July), Groundwater Monitoring, Bitterroot Valley Sanitary Landfill, Ravalli County, Montana. December.

McMurtrey, R.G., R.L. Konizeski, M.V. Johnson and J.H. Bartels. 1972. Geology and Water Resources of the Bitterroot Valley, Southwestern Montana. In: U.S. Geological Survey Water-Supply Paper, 1889, 80p.

Montana Department of Environmental Quality. 1996. Letter to Gyula Kovach, Division of Safety, National Institutes of Health, Modifying Permit MGWPCS-G1004. April.

__. 1999. Circular WQB-7, Montana Numeric Water Quality Standards. September.

__. 2002. Record of Decision, Bitterroot Valley Sanitary Landfill State Superfund Facility, Ravalli County, Montana. January.

Taylor, J.K. 1990. Statistical Techniques for Data Analysis. Lewis Publishers, Inc. Chelsea, Michigan.

USEPA. 1988. Laboratory Data Validation, Functional Guidelines for Evaluating Organics Analyses. February.

__. 1994a. USEPA Contract Laboratory Program, National Functional Guidelines for Inorganic Data Review. February.

__. 1994b. USEPA Contract Laboratory Program, National Functional Guidelines for Organic Data Review. February.

__. 1994c. Guidance for the Data Quality Objectives Process. United States Environmental Protection Agency Quality Assurance Management Staff, Final. September. EPA/600/R- 96/055

__. 1999. EPA Requirements for Quality Assurance Project Plans. U.S. Environmental Protection Agency Quality Staff (2811R), Interim Final. November. EPA QA/R-5.

U.S. Geological Survey. 1986. Water Resources Data, Montana, Water Year 1986. In: U.S.

Geological Survey Water Data Report MT-86-2.

Note:

Maxim Technologies, Inc.® was formerly Chen-Northern, Inc. and Huntingdon Engineering and Environmental, Inc.

APPENDIX A

QUALITY ASSURANCE PROJECT PLAN

GROUNDWATER MONITORING

BITTERROOT VALLEY SANITARY LANDFILL

RAVALLI COUNTY, MONTANA

Appendix A – BVSL Quality Assurance Project Plan 1

QUALITY ASSURANCE PROJECT PLAN

Groundwater Monitoring

Bitterroot Valley Sanitary Landfill, Ravalli County, Montana

This QAPP has been written to ensure the reliability of monitoring and measurement data. This QAPP identifies data quality objectives, minimum data requirements, analytical method detection limits, data reduction and validation procedures, and corrective actions. Guidance in the QAPP will enable field personnel to address quality issues in the field so that data collected meet the established data quality objectives. This QAPP has been developed following recent U.S. Environmental Protection Agency (EPA) guidance (EPA 1999).

PROJECT MANAGEMENT

Project Organization

Personnel and their associated responsibility for the BVSL, Ravalli County, Montana are listed below:

Project Officer – Jim Carscadden, P.E., National Institutes of Health (NIH) Responsibilities: Oversight of entire project, including: planning and support; document review and approval; contract administration; coordination with Montana Department of Environmental Quality; decision-maker; coordination of decision making process.

Interagency Cooperation – Kelly Schmitt and Denise Martin, Montana Department of Environmental Quality (MDEQ) CECRA Program Responsibilities: Planning and document review; coordination with the NIH; decision-maker.

Technical Contractor Project Manager – K. Bill Clark, Maxim Technologies, Inc.® (Maxim)

Responsibilities: Project coordination and planning; consultation and liaison with the NIH;

assist in field planning and activities; responsible for problem solving and decision-making; ensures work crews comply with all site health and safety requirements; quality assurance of project documents.

Health and Safety Officer – Don May, Maxim

Responsibilities: Field coordination and supervision of data collection activities; document field activities in the site log book; responsible for equipment, field decisions, and field quality control; ensures that work crews comply with all site health and safety requirements.

Quality Assurance Manager – A. Cambell Stringer, Maxim

Responsibilities: Reviews all chain of custody forms and analytical data and insures that analytical data meet current standards for accuracy and precision.

Appendix A – BVSL Quality Assurance Project Plan 2

Field Team Samplers – Don May, Oran Brazington, Gavin Hudgeons, Barri Twardoski, Jerry Armstrong, Maxim

Responsibilities: Responsible for implementation of the sampling procedures, sample custody, field equipment operation, maintenance, calibration, and standardization.

Subcontracted Services - Electrical Services - Sangster Electric, Inc., Stevensville, Montana;

Pump and Well Services - Eslinger Pump and Well Service, Inc., Corvallis, Montana; Industrial Services - Nash Enterprises, Inc., Missoula, Montana; Surveying - Eli & Associates, Inc., Missoula, Montana; Laboratory - Northern Analytical Laboratories, Inc., Billings, Montana.

Problem Description Waste laboratory chemicals were disposed of at the BVSL between 1981 and 1985 and groundwater contamination was discovered in 1987. As a result of this finding, the NIH completed several actions including a multi-phase remedial investigation and draft final feasibility study. NIH also implemented several Interim Remedial Actions since 1993 aimed at removing the source of groundwater contamination and mitigating impacts to the public.

Groundwater monitoring constitutes one component of NIH's current activities at the BVSL facility. Other interrelated activities being completed by NIH include operation, maintenance and monitoring of both the Phase IIA groundwater remediation system, and monitoring and maintaining the iron/manganese filtration units located on 14 replacement domestic wells.

More detailed descriptions of the problems present at the BVSL are presented in Sections 1.0 and 4.0 of the work plan.

Decision Statement The purpose of this work plan is to establish the framework for continued groundwater monitoring at and in the vicinity of the landfill. The work plan will be used in conjunction with the QAPP and Health and Safety Plan (HSP, Appendix B). Specific purposes of the work plan are to:

• Identify monitoring stations, the specific types of monitoring to be performed at each station, and the frequency of monitoring.

• Standardize field methods that will be routinely used to collect environmental samples.

• Identify routine physical and chemical parameters that will be analyzed.

• Identify laboratory methods that will be used for sample analysis.

• Establish quality assurance and quality control procedures.

• Set forth the format and schedule for project deliverables.

Project Task Description Maxim has identified five tasks to complete the monitoring work plan that was developed for the project. Data generated through the implementation of the plan will be used for:

• Tracking temporal and spatial trends in groundwater flow and quality.

• Evaluating the effects of interim remedial actions undertaken by NIH and effects of NIH’s Phase IIA groundwater remediation system on groundwater flow and quality.

• Documenting VOC water quality relative to Montana groundwater standards.

• Monitoring the effectiveness of water treatment systems on replacement domestic wells in reducing concentrations of iron and manganese.

• Providing operation and maintenance of the Phase IIA groundwater treatment system.

Appendix A – BVSL Quality Assurance Project Plan 3

Data collection efforts include: measuring water levels and collecting samples for VOC analysis from selected wells; monitoring the operation of and collecting samples of influent and effluent from the Phase IIA remediation system; and, collecting samples downstream of treatment units on replacement water supply wells for total iron and manganese analysis and total coliform bacteria tests.

Groundwater Monitoring Monitoring, consisting of water level measurements and sampling of selected wells, will occur on a semiannual basis (January and July). Data resulting from monitoring will be validated and incorporated into the existing project database. Key data will be both posted on maps and graphed to display trends. Reports will be issued to the NIH and the MDEQ’s Remediation Division after each monitoring event. In addition, monitoring data obtained from individual properties will be transmitted directly to property owners.

Phase IIA Groundwater Treatment System Sampling The Phase IIA groundwater treatment system will be monitored monthly and samples of influent and effluent will be collected quarterly (January, March, July, and September).

Quarterly reports will be prepared and submitted to NIH and MDEQ to document system operation.

Iron and Manganese Treatment System Sampling Annual sampling of water from sampling ports “downstream” of iron/manganese treatment units on 14 replacement wells will be collected in July for total iron and manganese. Data will be used to assess the efficacy of the treatment units in reducing iron and manganese concentrations.

Total Coliform Bacteria Samples for total coliform bacteria will be collected annually in July at the same locations as iron and manganese samples. Total coliform data will be used to evaluate the presence/absence of total coliforms.

Data Quality Objectives Data quality objectives (DQO) for the BVSL groundwater monitoring plan were developed to provide a systematic planning effort for establishing criteria for data quality and for developing data collection. The DQO process follows EPA guidance (EPA 1994c).

Decision Inputs The data required to address the project tasks include physical and chemical characterization of groundwater underlying the BVSL site and surrounding property, characterization of the water quality from the Phase IIA groundwater pump and treatment system, and documentation of iron and manganese concentrations “downstream” from the iron/manganese treatment units in selected domestic replacement wells. Data from previous site investigations and monitoring activities will be used in conjunction with continued site monitoring data to compile a more complete understanding of the aquifer system underlying the site and the effect of previous remedial activities on the overall groundwater quality. A list of the data collection type, data parameters, and data users is provided on the following table.

Appendix A – BVSL Quality Assurance Project Plan 4

DATA COLLECTION TYPE, DATA PARAMETERS, AND DATA USES

Groundwater Monitoring Bitterroot Valley Sanitary Landfill, Ravalli County, Montana

Sample Type Typical Data Parameters Data Uses

Groundwater VOCs, static water level, pH, specific conductivity, D.O., ORP, temperature

Contaminant concentrations, source areas, water pathways, water movement, exceedances of water quality standards, effectiveness of site remedial actions.

Phase IIA Remediation System

VOCs, operational parameters

Effectiveness of Phase IIA system on removal of VOCs, system operation.

Iron/manganese treatment units Total iron and manganese

Effectiveness of water treatment systems in reducing concentrations of iron and manganese.

Study Boundary The study boundary is defined by the limits of the groundwater monitoring. Data will primarily be collected semi-annually during periods of the highest seasonal groundwater level (July) and lowest seasonal water level (January/February). The Phase IIA groundwater treatment system will be monitored monthly and influent and effluent samples will be collected quarterly (January, March, July, and September). Annual sampling of replacement well iron/manganese treatment systems will occur in July.

Decision Rule Several different statistical parameters will be used to develop the data collected during the study. Point concentrations in groundwater will be used to determine the upgradient and downgradient water quality conditions present at the site. Influent and effluent sample concentrations will be used to document effectiveness in removing VOCs by the Phase IIA system. Point concentrations in post-treatment water samples from replacement wells will be used to assess the effectiveness of treatment units in reducing iron and manganese.

Action levels for the phase IIA effluent samples will be based on MDEQ numeric water quality standards (MDEQ 1999). If concentrations of contaminants of concern exceed action levels, then alternative response actions will be considered.

Tolerable Limits of Decision Errors Concentrations of contaminants of concern (principally, chloroform, dichlorodifluoromethane, 1,1-dichloroethane, methylene chloride, tetrachloroethene, trichloroethene, and vinyl chloride) in impacted groundwater range widely due the distribution of the monitoring network as it pertains to the identified source area and complex aquifer heterogeniety which influences groundwater flow velocity and direction of the resultant plume. The total study error present in sampling and measurement will be minimized by collecting a relatively large number of samples that will represent the range of concentrations present in impacted groundwater. The probability of choosing a false positive that would indicate a response action is necessary for

Appendix A – BVSL Quality Assurance Project Plan 5 groundwater that pose no risk to human health or the environment is low. Therefore, decisions for response actions that result from the groundwater sampling program will be made with confidence. Re-confirmation sampling and analysis will further reduce the likelihood of decision errors.

Sampling Design The types and numbers of samples required were developed in coordination with the NIH and MDEQ. The level of effort, number of samples, and types of samples are described in previous sections of this work plan.

Special Training All site workers will be required to have current OSHA 40 hour HAZWOPER training, including annual 8-hour refreshers. All Maxim employees who work on the BVSL monitoring and system maintenance program will be required to read this work plan and sign the acknowledgement sheet included as Appendix F of the Groundwater Monitoring Work Plan in Maxim’s official office copy.

Documents and Records The Maxim project manager will be responsible for ensuring project personnel have the current version of the QAPP and other planning documents. Maxim’s project manager will maintain project files and retain copies of project documents in Maxim’s Missoula, Montana office.

The data report package for the project will include field notes, field logs, field forms, calculation briefs, chain-of-custody records, and analytical reports. Analytical data will be provided to Maxim in both electronic and hard copy, and will be incorporated into the existing project database. Analytical reports will be complete with all laboratory control and calibration data as well as all method quality control data. This information will be provided as hard copies. Key geochemical and physical data will be both posted on maps and graphed to display trends.

Draft submittal reports will be issued to the NIH following each monitoring event. The monitoring reports will be finalized after receipt of comments from the NIH. Comments will be incorporated into final reports. Final reports will then be issued to the NIH and MDEQ.

DATA GENERATION AND ACQUISITION

Sampling Process The type and numbers of samples, sampling methods, sample handling and custody, and analytical methods are described in more detail in the project groundwater monitoring work plan; with the sampling process specifics described in Section 2.0.

Quality Control Quality control samples are described in Sections 2.2 and 2.5 of the project groundwater monitoring work plan.

Equipment Operation, Calibration, And Standardization All field and laboratory equipment will be operated, maintained, calibrated, and standardized in accordance with EPA and manufacturer's recommended procedures. Applicable Maxim SOPs contain the field equipment operation, maintenance, calibration, and standardization procedures (Appendix D, Groundwater Monitoring Work Plan). Analytical methods contain laboratory equipment operation, maintenance, calibration, and standardization procedures.

Appendix A – BVSL Quality Assurance Project Plan 6

Data Management All analytical data for the project will be entered into a Microsoft Access database. Laboratory data will be directly downloaded in electronic format into the database. Field parameter data will be entered into the database manually. Electronic files will be backed up weekly in accordance with Maxim’s procedures for preservation and security of electronic data. Daily backups will be created prior to entry of new data in the database to prevent loss of data during data reduction.

Survey data will be submitted to Maxim by the survey subcontractor in electronic format suitable for conversion into AutoCAD 2000 format. Electronic survey data will be archived in the same manner as electronic analytical data.

Groundwater monitoring observations, field monitoring parameters, and other site data will be entered onto appropriate field forms and filed in designated project files in Maxim’s Missoula, Montana office. Maxim’s quality assurance manager will maintain quality control of data transfer into the database by validating 10% of the entries placed in the database.

ASSESSMENT AND OVERSIGHT ELEMENTS

Maxim’s project manager and quality assurance manager will be responsible for assessment and oversight of project activities. The project manager will be updated frequently (daily or twice weekly, depending on level of activity) during field data collection activities.

An internal review of all field procedures will be performed by the Maxim project manager and quality assurance manager prior to any field work. The internal review will include reviewing:

procedures selected for the sampling program; QA/QC samples required; and, personnel training requirements. The laboratory is required to have written procedures addressing internal QA/QC (see Appendix G).

Corrective actions will be taken immediately upon identification of potential problems with data acquisition or measurement. Field equipment malfunctions are identified immediately and will be corrected by the field team leaders. Corrective actions will be documented in the field notes.

Laboratory equipment malfunctions are handled by the chemist according to EPA analytical method specifications. Laboratory QC samples (calibration samples, method blanks, matrix spike samples, laboratory control samples, and laboratory duplicates) will be handled according to EPA analytical method specifications. Laboratory corrective actions will be included as a summary page in the data package.

DATA REVIEW, VERIFICATION, AND VALIDATION

Data Reduction Data reduction is performed on the laboratory data while still in the laboratory; it is the result of grouping similar QC samples and calculating and reporting their recoveries. Maxim will work directly with the laboratory’s data quality assurance coordinator who will review all analytical data associated with each sample. The types of laboratory quality control data reviewed will include calibration standards, calibration verification, laboratory controls, holding times, laboratory duplicates, and laboratory spikes. When EPA methods are used, the applicable data reduction procedures required by the EPA method will be used.

Data Review The ability of data to meet DQOs is evaluated with a precision, accuracy, representativeness, completeness, and comparability (PARCC) statement. A PARCC statement is generated during data evaluation (after data have been validated) and is described below.

Appendix A – BVSL Quality Assurance Project Plan 7

Precision Precision is the amount of scatter or variance that occurs in repeated measurements of a particular analyte. Precision acceptance and rejection for this project will be based on the relative percent difference (RPD) of the laboratory duplicates. To determine precision, the RPD for each duplicate/natural pair will be compared to the range of acceptable precision for the specific analytical method. Natural results associated with RPDs outside acceptable precision limits will be considered estimated. An overall assessment of precision will be made upon completion of the project. Because of the small number of laboratory duplicate samples anticipated, overall precision will be stated as a pooled standard deviation, as recommended by Taylor (1990). The range of acceptable RPDs for precision is presented below.

PRECISION, ACCURACY, AND COMPLETENESS REQUIREMENTS

Bitterroot Valley Sanitary Landfill, Ravalli County, Montana

PRECISION

ACCURACY

COMPLETENESS

20%

70%-130%

90%

Accuracy Accuracy is measured as the ability of the analytical procedure to determine the actual or known quantity of a particular substance in a sample. Accuracy acceptance or rejection will be based on the percent recovery (%R) of the laboratory matrix spike for all water samples. To determine accuracy, the %R for each matrix spike or LCS will be compared to the acceptable range as specified in the applicable laboratory method. Natural results associated with percent recoveries outside acceptable limits will be considered estimated. Natural results associated with percent recoveries of less than 50% will be considered rejected, as recommended by EPA (1988). Overall accuracy will be stated as the mean %R. Because of the small number of matrix spike and laboratory control samples anticipated, no confidence interval will be calculated. The range of acceptable accuracy is presented in the table above.

Representativeness The objective in addressing representativeness is to assess whether information obtained during the investigation accurately represents site conditions. Laboratory water blanks, and field blank (e.g., equipment rinsate blank) samples are used to assess representativeness. Natural results associated with contaminated blanks will be considered estimated, with a high bias, when the natural result is greater than the practical quantitation limit but less than five times the contaminant concentration, as recommended in EPA (1988).

Completeness The objective in addressing completeness is to assess whether enough data have been collected and enough data are valid to meet the investigation needs. Completeness is assessed by comparing the number of valid sample results to the number of samples collected. The completeness targets for this investigation are presented in the table above.

Comparability The objective in addressing comparability is to assess whether one set of data can be compared to another set of data. Comparability is assessed by determining if an EPA approved analytical

Appendix A – BVSL Quality Assurance Project Plan 8 method was used, if values and units are sufficient for the database, if specific sampling points can be established and documented, and if field collection methods were similar.

Data Validation Data validation is performed on laboratory data in the laboratory and in the office after data reduction is complete. The objective of data validation is to identify any unreliable or invalid laboratory measurements and qualify that data for interpretive use. Data validation will be performed according to EPA guidelines for organics (EPA 1994b, 1988). Laboratory data validation is reported by qualifying concentrations with result and data qualifiers. These qualifiers are shown in the table below.

RESULT AND DATA QUALIFIERS

Bitterroot Valley Sanitary Landfill, Ravalli County, Montana

H - Required holding time was exceeded.

F% -Field duplicate relative % difference outside of acceptable limits.

F -Field duplicate results exceed acceptable limits - PQL determination.

M% -Matrix spike recoveries exceed acceptable limits.

B -Method blank shows evidence of contamination.

U -The material was analyzed for, but was not detected above the level of the associated value. The associated value is the practical quantitation limit (PQL).

J -The associated value is an estimated quantity.

R -The data are unusable, rejected.

Q -Due to dilution, quantification down to MT Standard could not be achieved.

X -Contaminated field blank.

C# -Instrument calibration relative standard deviations are outside acceptable limits.

S% -Laboratory surrogate spike recoveries are outside acceptable limits.

D% -Laboratory duplicate sample is outside acceptable limits.

L% -Laboratory control sample is outside acceptable limits.

* -The material was detected below the level of the PQL, but above the MDL.

T -Trip blank shows evidence of contamination.

Knowing the limitations of the data assists the data user when making interpretations. Data with limitations are usable for evaluation as long as the limitations are considered.

Data validation of other field data (pH, D.O., ORP, and SC) is not possible because these data have very limited statistical control limits. Professional judgment is required to assess the impact of field QC on the overall quality and usability of the field data. Field blanks are the most straightforward QC checks to assess. Evidence of cross contamination can be ascertained without much subjective judgment and the options for corrective action are clear.

Appendix A – BVSL Quality Assurance Project Plan 9

Data Reconciliation

Data reconciliation is performed in the office after data validation is complete. Data evaluation is the generation of the PARCC statement that assesses the data meeting the DQOs. Using the PARCC statement as a basis, reconciliation of data validation will be done semiannually by comparing validation results with project objectives. If data user requirements are not met, the Maxim project manager and quality assurance manager will confer with the NIH Project Officer on how issues will be resolved and how limitations of the data will be reported.

APPENDIX B

HEALTH AND SAFETY PLAN

GROUNDWATER MONITORING

APPENDIX C

PROJECT WELL INVENTORY

GROUNDWATER MONITORING

WELL INVENTORY

Well ID Legal Location Descriptive Location Well Type Information Source

Drilling Method

Borehole Diameter (inches)

Total Depth (feet)

Cased Depth (feet)

Completion Date

BRGW-01 08N20W31CCC 285 DINGER LANE DOMESTIC CNI N/A 6 95 95

BRGW-02 08N20W31CDD LANDFILL SHOP COMMERCIAL CNI CHURN 6 71 71 8/10/1972

BRGW-03 03N20W21CDA MERIDIAN ROAD MONITORING N/A CABLE TOOL 6 24 24 2/28/1982

BRGW-05 07N20W6BBA 146 WEST VIEW DOMESTIC DNRC/CNI CABLE TOOL 6 106 106 10/7/1977

BRGW-08 08N20W31CDD MERIDIAN ROAD MONITORING CNI CABLE TOOL 6 25 25 4/24/1986

BRGW-09 08N20W31DCD ADJACENT TO PINE LANE MONITORING CNI AIR ROTARY 7.5 101.92 98 10/19/1989 BRGW-10 08N20W31DCD ADJACENT TO PINE LANE MONITORING CNI AIR ROTARY 7.5 29.6 29.3 10/20/1989 BRGW-18 07N20W6BBD 135 WEST VIEW DOMESTIC DNRC/CNI AIR ROTARY 6 145 140 10/14/1975

BRGW-21 07N20W6BBA 178 WEST VIEW DOMESTIC CNI N/A

BRGW-30S 08N20W31CDA NEAR BRGW-4 MONITORING CNI AIR ROTARY 6 20.5 20.5 1/25/1992

BRGW-31D 08N20W31DCA NORTH OF POND MONITORING CNI AIR ROTARY 6 95 90 2/12/1992

BRGW-32S 08N20W31DCA NORTH OF POND MONITORING CNI AIR ROTARY 6 20 18.5 2/17/1992

BRGW-33S 08N20W31DDB NEAR D-39 MONITORING CNI AIR ROTARY 6 20 20 1/27/1992

BRGW-34D 08N20W31DDD NEAR D-43 MONITORING CNI AIR ROTARY 6 78 78 1/28/1992

BRGW-35S 08N20W31DDD NEAR D-43 MONITORING CNI AIR ROTARY 6 19 19 1/28/1992

BRGW-36D 08N20W31CCD NEAR SOLVENT PIT MONITORING CNI AIR ROTARY 6 120 120 2/7/1992 BRGW-37S 08N20W31CDD NEAR SOLVENT PIT MONITORING CNI AIR ROTARY 6 62.5 62.5 2/7/1992 BRGW-38D 08N20W31CDD NORTH OF LANDFILL SHOP MONITORING CNI AIR ROTARY 6 110 110 2/4/1992 BRGW-39S 08N20W31CDC NORTH OF LANDFILL SHOP MONITORING CNI AIR ROTARY 6 59.5 59.5 2/3/1992 BRGW-40D 08N20W31CDC SW OF LANDFILL SHOP MONITORING CNI AIR ROTARY 6 150 150 2/4/1992 BRGW-41S 08N20W31CDC SW OF LANDFILL SHOP MONITORING CNI AIR ROTARY 6 64 64 2/5/1992 BRGW-42D 08N20W31CCD INFILTRATION PIT MONITORING CNI AIR ROTARY 6 90 81 2/10/1992 BRGW-43S 08N20W31CCD INFILTRATION PIT MONITORING CNI AIR ROTARY 6 25 25 2/11/1992

BRGW-44S 08N20W31CCD PIT AREA MONITORING CNI AUGER 12 39 38 5/19/1993

BRGW-45S 08N20W31CCD PIT AREA MONITORING CNI AUGER 10 39 39 5/20/1993

BRGW-46S 08N20W31CCD PIT AREA, DINGER LN. MONITORING CNI AIR ROTARY 8 58 58 6/3/1993 BRGW-47S 08N20W31CCD PIT AREA, DINGER LN. MONITORING CNI AIR ROTARY 8 54 52 6/4/1993 BRGW-48S 08N20W31CCD PIT AREA, DINGER LN. MONITORING CNI AIR ROTARY 8 58 45 6/4/1993 BRGW-49S 08N20W31CCD 50' SOUTH OF DINGER LN. PIT AREA MONITORING CNI AUGER 6 64.5 64.5 6/8/1993 BRGW-50D 08N20W31CCD 50' SOUTH OF DINGER LN. PIT AREA MONITORING CNI AUGER 8 117 114 6/28/1993

BRGW-51D 08N20W31DDD 120 PINE LANE MONITORING CNI AUGER 8 140 76 6/14/1993

BRGW-52S 08N20W31DDD 120 PINE LANE MONITORING CNI AUGER 8 35 35 6/14/1993

BRGW-53S 08N20W31CCD PIT AREA, DINGER LN. MONITORING CNI AUGER 8 49.5 49 6/22/1993

BRGW-54D 07N20W6ABB 86 ROCKLAND LANE MONITORING CNI AIR ROTARY 8 81 81 6/30/1993

BRGW-55S 07N20W6ABB 86 ROCKLAND LANE MONITORING CNI AIR ROTARY 8 20 17 6/29/1993

BRGW-56DD 08N20W31CCD ADJACENT TO PINE LANE MONITORING CNI AIR/MUD ROTARY 10/6 181 179 7/15/1993

BRGW-57D 08N20W31CCD PIT AREA MONITORING CNI AUGER 4.5 102 95 8/30/1993

BRGW-58S 08N20W31CDD NEAR WELL BRGW-40D AND BRGW-41S MONITORING CNI AUGER 6 55 55 1/17/1994

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William.Craig Sticky Note updated through 2009

Well ID Legal Location Descriptive Location Well Type Information Source

Drilling Method

Borehole Diameter (inches)

Total Depth (feet)

Cased Depth (feet)

Completion Date

BRGW-59S 08N20W31CCD N.W. OF GRAVEL PIT AND DINGER LAKE MONITORING CNI AUGER 6 60 60 1/26/1994 BRGW-60S 07N20W6BAA S OF W VIEW DR/300 FT W MERIDIAN RD MONITORING CNI AUGER 6 54.5 53 1/27/1994 BRGW-61DD 08N20W31DDD WNW OF HUNT RES. SE OF 34D AND 35S MONITORING CNI AIR/MUD ROTARY 10/6 219 196 3/16/1994 BRGW-62DD 08N20W31DCC 2172 HWY 93 REPL. DOMESTIC CNI AIR/MUD ROTARY 22/14/12/6 250 250 2/1/1995 BRGW-63DD 08N20W31DAD SW OF PHILSON RESIDENCE REPL. DOMESTIC MAXIM AIR/MUD ROTARY 20/16/12/6 249 249 2/18/1995 BRGW-64DD 07N20W6BAA 118 WESTVIEW DRIVE REPL. DOMESTIC MAXIM AIR/MUD ROTARY 20/14/12/6 259 259 11/15/1995 BRGW-65DD 08N20W31DDD 556 FT NW OF HUNT RES., PINE LANE REPL. DOMESTIC MAXIM AIR/MUD ROTARY 20/14/12/6 265 265 11/29/1995 BRGW-66DD 08N20W31DDD 125 PINE LANE REPL. DOMESTIC CNI AIR/MUD ROTARY 20/14/12/6 270 270 1/9/1996 BRGW-67DD 08N20W31DDC SW CORNER OF BASSACKER PROPERTY REPL. DOMESTIC MAXIM MUD/AIR ROTARY 14, 12, 6 276 276 4/18/1996 BRGW-68DD 08N20W31DAD 50' SE OF SETTLEMIRE TRAILER REPL. DOMESTIC MAXIM MUD/AIR ROTARY 14, 12, 6 270 270 4/30/1996 BRGW-69DD 08N20W31CDD 8' W OF BAUER SHOP REPL. DOMESTIC MAXIM MUD/AIR ROTARY 14, 12, 6 267 267 5/16/1996 BRGW-70DD 08N20W31CDA 70' W OF WILSON RESIDENCE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 250 250 6/1/1996 BRGW-71DD 08N20W31DDB 75' N + 15' W OF KITTEL RESIDENCE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 260 260 6/12/1996 BRGW-72DD 08N20W31DDC 8' E + 45' SE OF HINSON SHED REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 273 273 6/24/1996 BRGW-73DD 08N20W31DDD 50'N, 30'E OF HUNT SOUTH BUILDING REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 300 273 11/15/1996 BRGW-74DD 08N20W06BAB 15'N, 5'E OF WALTER'S PUMPHOUSE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 257 255.5 9/20/1996 BRGW-75DD 08N20W06BAB 200'N, 236'W OF SE PLAT 27-1 REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 262 262 11/1/1996 BRGW-76DD 08N20W06BAD 82'N, 119'E OF SW PLAT 40 REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 276 276 10/28/1996 BRGW-77DD 08N20W31DCD 10'N, 75'E OF BASSACKER GARAGE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 263 263 10/2/1996 BRGW-78DD 08N20W31DDB 100'N, 400'W OF KITTLE RESIDENCE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 270 270 11/7/1996 BRGW-79DD 08N20W31DDC SE CORNER OF LOG YARD, PINE LANE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12, 6 259 259 11/5/1997 BRGW-80DD 08N20W31CD 25' N OF GW-2 PUMPHOUSE REPL. DOMESTIC MAXIM MUD/AIR ROTARY 15, 12 260 260 8/12/1997 BRGW-81S 08N20W31DCC 200' N OF INT PINE & HWY 93S MONITORING MAXIM AIR ROTARY 6 27 27 12/11/1997 BRGW-82D 08N20W31DCC 200' N OF INT PINE & HWY 93S MONITORING MAXIM AIR ROTARY 6 104 102 12/5/1997 BRGW-83D 08N20W31CC PIT AREA, DINGER LN MONITORING MAXIM AIR ROTARY 6 105 97 2/10/1999 BRGW-84D T7NR20WS6BA 118 WESTVIEW DR. MONITORING MAXIM AIR ROTARY 6.7/8 158 158 9/13/1999 BRGW-85 T8NR20WS31 15'N AND 10' W OF BAUER, SE CORNER MONITORING MAXIM AIR ROTARY 8 132 78 1/7/2000 BRGW-86D T8NR20WS31 15'N AND 10' W OF BAUER, SE CORNER MONITORING MAXIM AIR ROTARY 8 132 129.5 1/7/2000 BRGW-87S T8NR20WS6 NW END OF DELAO, S OF DINGER, 85' MONITORING MAXIM AIR ROTARY 6 69 67.5 1/13/2000 BRGW-88S T7NR20WS6 NE END OF DELAO, 10' S OF DINGER MONITORING MAXIM AIR ROTARY 6 55 55 1/14/2000 BRGW-89S T7NR20WS6 200' S OF DINGER,800'W OF MERIDIAN MONITORING MAXIM AIR ROTARY 6 59 59 1/17/2000 BRGW-90D T8NR20WS31DB 125' S, 70' W OF NE KITTLE CORNER MONITORING MAXIM AIR ROTARY 6 87 86 11/13/2000 BRGW-91D T8NR20WS31DB NE CORNER OF GARLAND PROPERTY MONITORING MAXIM AIR ROTARY 6 86 85.5 11/14/2000 BRGW-92D T8NR20WS31DB CENTER OF GARLAND'S N BOUNDARY MONITORING MAXIM AIR ROTARY 6 89 88 11/16/2000 BROW-01D 07N20W6AAB N. OF CRAFT RES. ON ROCKLAND LANE MONITORING CNI AIR ROTARY 8 99 99 6/22/1993 BROW-02S 07N20W6AAB N. OF CRAFT RES. ON ROCKLAND LANE MONITORING CNI AIR ROTARY 8 39 39 6/16/1993 BRPW-01D 07N20W6AAB N. OF CRAFT RES. ON ROCKLAND LANE MONITORING CNI AIR ROTARY 8 140 99 6/18/1993 BRPW-02S 07N20W6AAB N. OF CRAFT RES. ON ROCKLAND LANE MONITORING CNI AIR ROTARY 8 39 39 6/16/1993

D-04 08N20W31DCC 2172 HWY 93 COMMERCIAL DNRC/CNI AIR ROTARY 6 114 114 11/24/1987

D-101 08N20W31DDC Pine Lane DOMESTIC GWIC CABLE 6 71 71 7/19/1997

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Drilling Method

Borehole Diameter (inches)

Total Depth (feet)

Cased Depth (feet)

Completion Date

D-19 08N20W31DDD 111 PINE LANE DOMESTIC DNRC/CNI N/A 6 59 59 9/20/1981

D-26 07N20W6ABB 86 ROCKLAND LANE DOMESTIC DNRC/CNI CABLE TOOL 6 30 30 1/7/1977

D-37 08N20W31CAD 2250 MERIDIAN DOMESTIC CNI N/A 49

D-38 08N20W31DBC 2216 HWY 93 DOMESTIC CNI N/A 27 27

D-39 08N20W31DDB 140 PINE LANE DOMESTIC DNRC/CNI AIR ROTARY 6 128 128 1/3/1983

D-40 08N20W31DDC 135 PINE LANE DOMESTIC CNI N/A 68

D-41 07N20W6AAA 76 ROCKLAND LANE…