GFI for Inquiry 8329066 - Scope of Work for LUCs at Dyess_2019.docx

SCOPE OF WORK

FOR

LONG TERM MANAGEMENT (LTM) FOR DYESS AFB TEXAS

(Information not related to Dyess AFB has been removed.)

19 August 2019 Attachment 1 FA8903-19-R-0074 19 August 2019 Page 1 of32

Performance Work Statement to Conduct Long Term Management (LTM) for Dyess, AFB, Texas

1.0 Scope

1.1 Introduction

This Performance Work Statement (PWS) encompasses the full range of methods, technologies, and supporting activities necessary to conduct environmental restoration/remediation efforts in order to support long-term management (LTM) for sites at Dyess AFB. Land Use Controls (LUCs/LTM) will be conducted at multiple sites at Dyess AFB. Further details for required tasks are included in Section 6.10.5 (can be found at end of document).

Support shall be conducted in accordance with all technical and regulatory requirements and a limited range of construction and ancillary services as required in support of those and other efforts as addressed herein. Requirements under this contract will primarily support environmental restoration/remediation, operations and services efforts; but requirements may also include traditional minor construction, demolition, and repair. Stand-alone design and conceptual work plan/implementation work plan (CWP/IWP) are NOT included in the scope of this contract.

Site Description and History:

A brief site description and history are provided for each site for each installation below. Additional information is available in site-specific documents on the Air Force Administrative Record at http://afcec.publica dmin-record.us.a f.mil/Se arch.aspx.

Dyess AFB-DP043, FT001, FT002, LF004, LF013, OTO11, OT031, OT03S, SD007, SD020, SD02S, SD028, SD029, SS042, ST032, and WP005

LF004 {SWMU 7}{Landfill No. 4} / DP043 {SWMU 39} <POL Sludge Disposal Area No. 2}: The Landfill, also known as SWMU 7, is located at the southern edge of the Base, southwest of Hardfill No. 1 in a seldom-used area of the Base. Nearby operations to the landfill are an adjacent grenade range and former FPTA No. 2. The site is approximately 1,800 x 1,800 feet.

Native grasses and low brush cover the site. The landfill was used to dispose of all solid waste at the base from 1955 to 1972. The waste placed in the landfill was primarily refuse and garbage, hut some shop wastes, construction debris, and vegetation were also included. The waste was disposed of in trenches approximately 260-300 x 16 x 8-10 feet. Once filled with waste, the trenches were covered with 4 to 5 feet of soil.

The POL Sludge Disposal Area 2, also known as SWMU 39, is located in the southern portion of the base next to the landfill and south of the Hardfill No. 1. The area was active between 1967 and 1978 and was used to dispose of unknown quantities of paint sludge, fuel tank cleaning wastes, and shop wastes by spreading them on the ground surface. The extent of this site is approximately 100 x 200 feet. LF004 and DP043 were evaluated as one unit for investigation and closure purposes.

Evaluation of site COCs under the Texas Natural Resource Conservation Commission (TNRCC) Risk Reduction Rule (RRR) guidelines indicated residual constituent concentrations present at LF004/DP043 present no significant risk to human health and the environment under the assumptions of commercial/industrial land use. The sites were closed with LUCs prohibiting residential land use and prohibiting potable groundwater use. After three years of semi-annual monitoring in 2000, 2001, and 2002 without exceeding the groundwater protections standards groundwater monitoring was discontinued. TCEQ approved Part A/Part B Permit Compliance Plan and Renewal on 2 April 2003, which included approved closure ofLF004/DP043.

FT001 {SWMU3A) (Fire Protection Training Area No. lA): FPTA No. IA, also known as SWMU 3A, occupies an area measuring approximately 400 x 800 feet and is located west of the main runway and east of the assault landing strip. No surface evidence of past activities is visible at the Site. The site was used from 1956 to 1967 for fire training activities and is now hard packed and covered by native grasses. Drums of waste from flight line shops and vehicle maintenance shops were reportedly taken to the area, punctured, and ignited. These wastes include JP-4, oils, solvents, paint thinners, and paints. About 500 gallons of fuel were used per fire training exercise, and the average frequency of fires was four per month. Extinguishing agents included protein foam and water.

Evaluation of site COCs under the TNRCC RRR guidelines indicated that residual constituent concentrations at FTOO1 presented no risk to human health and the environment under the assumptions of commercial/industrial land use. The site was closed with LUCs prohibiting residential land use and prohibiting potable groundwater use. After three years of semi-annual monitoring in 2000, 2001, and 2002 without exceeding the groundwater protections standards, groundwater monitoring was discontinued. TCEQ approved Part A/Part B Permit Compliance Plan and Renewal on 2 April 2003, which included approved closure of FTOOI.

FT002 (SWMU38) (Fire Protection Training Area No. 18): FPTA No. 18, also known as SWMU 38, is located in the Marrion drop zone, west of the main runway, west of the asphalt landing strip, and north of FTOOL The site was part of the Tye Airfield and is approximately 100 by 100 feet of flat terrain. The site was used from 1956 to 1967 for fire training activities and is now hard packed, covered by native grasses, and undetected by surface evidence. Drums of waste from flight line shops and vehicle maintenance shops were reportedly taken to the area, punctured, and ignited. These wastes include JP-4, oils, paint thiruters, and paints. About 500 gallons of fuel was used per fire training exercise. The frequency for the fires is unknown, but expected t be about four per month. Extinguishing agents included protein foam and water.

The geologic investigation at FT002 showed that water-bearing materials were not present at this site; therefore, no groundwater evaluation was conducted. Evaluation of site COCs under TNRCC RRR guidelines indicated residual constituent concentrations at FT002 presented no risk to human health and the environment under the assumptions of commercial/industrial land use.

The site was closed with LUCs prohibiting residential land use.

WP005 (SWMU 6}- Evaporation Pit Waste Storage Tank/ LF013 (SWMU 9) Hardfill: The Evaporation Pit Area (WPOOS), also known as SWMU 6, is located in the northwestern portion of Hardfill No. 1. Two or more pits (including a main pit) may have been here. The actual size of the main pit is undetermined, although aerial photos indicate that in 1970, the pit did not exceed 200 feet on the longest side. The depth was reportedly 8 to IO feet below the ground surface (bgs). The pit area was used for disposal of waste oil, solvents, jet fuel, and hydraulic fluid from the early 1950s to the late 1970s. Surface features of this site consist of a subtle depression sloping to the north, encompassing an area approximately 350 x 600 feet. Within the depression, a variety of partially buried debris was exposed. The debris consists of blocks of concrete and pavement, flattened drums, and other miscellaneous hardfill. ·

The Hardfill No. 1 (LF013), also known as SWMU 9, is located adjacent to the northwestern comer of the grenade range in the southern portion of the Base. The exact boundaries and aerial extent of LF013 were not well defined, but it was believed to occupy between 5 and 10 acres and was in use from 1955 to 1978. The area is no longer utilized and has become largely overgrown with grass and scrub.

WPOO5 is located within the boundaries of LFO13. The area was used for the burial of various types of refuse and debris in unlined pits in the ground. The wastes included construction debris, tree limbs, asphalt, concrete, and empty pesticide and herbicide bags/containers. Base personnel stated that virtually anything could have been previously disposed of at LFOI3. WPOO5 and LFOI3 were evaluated as one unit for investigation and closure purposes.

Evaluation of site COCs under TNRCC RRR guidelines indicated residual constituent concentrations present at WP005/LF013 present no risk to human health and the environment under the assumptions of commercial/industrial land use. The sites were closed with LUCs prohibiting residential land use and prohibiting potable groundwater use. After three years of semi-annual monitoring in 2000t 2001, and 2002 without exceeding the groundwater protections standardst groundwater monitoring was discontinued. TCEQ approved Part A/Part B Permit Compliance Plan and Renewal on 2 April 2003, which included approved closure of WP005/LF013.

OT011 (SWMU 1) (DRMO-Building 9104 Waste Storage Area): The DRMO facility, also known as SWMU 1, is located on the northern side of Building 9104. The area includes several buildings and a fenced outdoor storage area that consists of bare ground and pavement of asphalt or concrete. Three areas of concern (North Source Area, West Source Area, and East Source Area) were identified in the RFI.

The North Source Area was located north of the fenced DRMO compound between the fence and a railroad spur. The ground surface in the area is flat and is covered with gravel. The area was used for drum storage from prior to 1980 until 1987.

The West Source Area was located within the fenced DRMO compound. The ground surface in the area is flat and is covered with concrete and asphalt. The area was used for drum storage from 1987 to 1988. TNRCC records indicate that approximately 40 drums, some of which were leaking, were stored in this area in 1988. The drums were removed for disposal in 1988 after chemical analysis of the contents. Chemical analysis indicated that drummed waste material included 1,2-dichloro-1,2,2-trifluoroethane, ethanol, l, 1,I-trichloroethane, petroleum hydrocarbons, low flash point materials, low pH materials, high pH materials, barium-containing wastes, lead-containing wastes, and chromium-containing wastes.

The East Storage Area was located within the fenced DRMO compound. The ground surface in the area is flat and is covered with concrete. A drainage swale located on the east side of the area collects surface water runoff from the paved lot around the East Source Area. The area consisted of container storage areas and waste pile areas. Drums stored within the area were reportedly leaking, and some drums were stored for five to seven years. No information is available regarding the dates, number, or types and quantities of materials spilled.

Evaluation of site COCs under TNRCC RRR program guidelines indicated residual constituent concentrations at OTO11 presented no risk to human health and the environment under the assumptions of commercial/industrial land use. The site was closed with LUCs prohibiting residential land use and prohibiting potable groundwater use.

OT031 (SWMU19) (463 FMS/Refurbishment Shop-Building 5017): Site OT031 is located east of the aircraft parking apron south of the former Building 5O17. Building 5017 was previously used for aircraft refurbishment operations. Hazardous wastes generated from operations were temporarily stored in the outdoor area from 1984 to 1990. The site consisted of two potential source areas: an approximately 72-square-foot concrete pad with a 6-inch concrete curb and a metal drum rack with no secondary containment. The concrete curb had a drain pipe and valve used for runoff control.

The areas received approximately 660 gallons of waste fluids per year. Waste fluids included dope thinner, lacquer thinner, enamel thinner, polyurethane thinner, polyurethane pain, lacquer, toluene, enamel paint, epoxy primer, methyl ethyl ketone, and solvent-containing rags. Wastes were transferred to the DRMO for storage prior to off-site disposal.

Site OT031 was recommended for closure under TNRCC RRS 1 for groundwater and RRS 3 for soils as a result of the 1998 CMI. The TNRCC concurred with the recommendations for site closure and removed Site OT031 from the Compliance Plan, which was approved 6 January 2000. A deed certification was filed in the Deed of Records of Taylor County 11 July 2000.

OT035 (SWMU32) (Golf Course Maintenance Shop): Site OT035 is located on the eastern portion of the base within the Golf Course area. The site formerly consisted of a fenced enclosure and contained the following buildings: 11973. 11974. 11975. 11977, and 11978.

Building 11973 was used for golf cart battery and parts storage. Building 11974 and 11975 consisted of office space and a break room. Building 11977 was used for storage of turf chemicals and maintenance equipment. The floor of the building was concrete in the area where maintenance equipment was stored. The portion of the floor where fertilizers and other lawn treatment chemical were stored consisted of wooden planks directly on the ground surface.

Products stored at the site included golf course maintenance and utility vehicle maintenance items including lead-acid batteries. turf maintenance equipment. fertilizers. pesticides, herbicides, oils, and other lubricants. Waste generated in the area included pesticide bags, used engine oil, and batteries. A wash area was also utilized for cleaning turf maintenance equipment.

The selected corrective measure for Site OT035 consisted of deed recordation of the site with soil and groundwater LUCs. A deed recordation was filed in the Deed of Records of Taylor County 11 July 2000. The TNRCC concurred with the recommendations for site closure and excluded Site OT035 from the Compliance Plan which was approved 6 January 2000.

ST032 (SWMU29) (Auto Hobby Shop Waste Oil Tank): Site ST032 is located at the southeastern corner of Third Street and Avenue B. The site consisted of a UST previously associated with Building 7101 Auto Hobby Shop. The 500-gallon capacity UST was located at the southeast corner of the pavement outside Building 7101 and received approximately 1,200 gallons of waste oil per year. While in use, personnel would manually pour waste oil into the tank fill pipe which was equipped with a funnel. Based on previous reports, soil staining was reported in the vicinity of the tank. Contents were removed from the UST for off-site disposal. The UST was removed in 1992. At that time, stained soil in the vicinity of the UST was excavated.

The selected corrective measure for Site ST032 consists of deed recordation of the site with soil and groundwater LUCs. A deed recordation was filed in the Deed of Records of Taylor County 11 July 2000. The TNRCC concurred with the recommendations for site closure and excluded Site ST032 from the Compliance Plan, which was approved 6 January 2000.

SD007 (SWMU34) (South Diversion Ditch (SDD)): The SDD, runs northeast across the Base from south of the main runway to east of the golf course, where the SDD exits the base. SWMU 34 is the entire stretch of the SDD that runs through the Base. Construction of the SDD was completed in 1958 to contain the flow of Little Elm Creek and conduct it across the Base. The ditch is approximately 150 feet wide at the top narrowing to about 35 feet wide at the water level. Groundwater discharges into the ditch through seeps along the banks. Stretches of bedrock are exposed along the bottom of the ditch and alluvial gravel can be seen in the ditch banks. The SDD is bermed above the surrounding land surface along much of its length, and the banks are covered with abundant vegetation.

Before the winter of 1987-1988, several oil/water separators at flight maintenance shops were connected to storm drains that eventually discharged into the SDD. Since then, operations have changed, and most oil/water separators discharge into sanitary sewers. Results from previous investigation activities indicated that concentrations of lead in the sediment exceeded TNRCC MSCs. TPH was also detected in the sediment; however, comparison values were unavailable during previous investigations. No COCs were detected in the surface water at the SDD.

Evaluation of site COCs under TNRCC RRR guidelines indicated residual constituent concentrations at S0007 presented no unacceptable risk to human health and the environment under the assumptions of commercial/industrial land use. The site was closed with LUCs prohibiting residential land use.

SD020 (SWMU17) (Building 4317 Oil/Water Separator): SD020 is located north of Building 4317 on the western end of the base. A former oil water separator (OWS) received fluids including waste fuels and oils discharged from Building 4317 aircraft maintenance activities.

The system received approximately 1,500 gallons of waste fluids per week while in use. Water from the separator was discharged to the sanitary sewer, and separated hydrocarbons were disposed off-site through a contractor. The OWS system included a 500-gallon fiberglass reinforced plastic (FRP) tank underground storage tank (UST) and a separate 550-gallon collection tank that was installed in 1986 and removed as part of a voluntary action by the Base in 1995.

The following were identified as COCs for groundwater: 2-methylnaphthalene, benzene, and TPH.

Evaluation of site COCs under RRS program guidelines indicated residual constituent concentrations at SD020 presented no risk to human health and the environment under the assumptions of commercial/industrial land use. The site was closed with LUCs prohibiting residential land use and limiting groundwater use to non-potable, with April 2003 approval of the Part B Permit and Compliance Plan Removal by TCEQ.

SD025 (SWMU23} (Building 5204 Oil/Water Separator}: Site S0025 is located near the southern end of Second Street, on the southern portion of the Base. The site includes an OWS associated with SWMU 23 that was located adjacent to the northwestern comer of Building 5204, a flight-related maintenance shop. The OWS consisted of an FRP underground tank approximately 25 feet long and 8 feet in diameter. The OWS received approximately 500 gallons of waste fluids per week containing waste fuels, solvents, and oils discharged from Building 5204 floor drains. Water from the separator was discharged to the sanitary sewer, and separated hydrocarbons were disposed off-site through a contractor. ·

Evaluation of site COCs under RRS program guidelines indicated residual constituent concentrations at SD020 presented no risk to human health and the environment under the assumptions of commercial/industrial land use. The site was closed with LUCs prohibiting residential land use and limiting groundwater to non-potable use with April 2003 approval of the Part B Permit and Compliance Plan Removal by TCEQ.

SD028 (SWMU26) (Building 7040 Oil/Water Separators}: Site S0028 is located in the central portion of Dyess AFB at the southwestern corner of Second Street and Avenue B. The site included two OWSs that were previously associated with Facility 7040, which was an accumulation point drum storage area that was used for wastes generated from maintenance and repair of motor vehicles and aircraft support equipment. The northern OWS was installed in 1986 and removed in 1995. The southern OWS, which was associated with a vehicle wash rack, was installed in 1986 and removed in 1995.

The OWSs each consisted of underground tanks constructed of concrete with a combined capacity of approximately 1,000 gallons. Waste fluids containing used oils, antifreeze, hydraulic fluid, and transmission fluid were collected in the tanks. Oils separated in the OWSs were pumped out for off-site disposal, and water was discharged to the sanitary sewer.

Site SD028 was recommended for closure under TNRCC RRS I for groundwater and RRS 3 for soils as a result of the 1998 CMI. The TNRCC concurred with the recommendations for site closure and removed Site SD028 from the Compliance Plan, which was approved 6 January 2000. A deed certification was filed in the Deed of Records of Taylor County 11 July 2000.

SD029 (SWMU27) (Building 8007 Oil/Water Separator): SD029 is located in the southern portion of the base, south of Buildings 8007 and 8008. The site included an OWS located south of Building 8008 that serves Building 8007. Building 8007 is used for 961h CES maintenance activities and includes an outdoor vehicle wash rack. The 50-gallon capacity OWS was installed in 1980 and removed 14 September 1995. The OWS received approximately 1,500 gallons of waste fluids containing waste fuels and oils per week. Separated hydrocarbons were pumped from the OWS for off-site disposal, and water was discharged to the sanitary sewer.

Site SD029 was recommended for closure under TNRCC RRS 3 for soils as a result of the 1998 CMI. The TNRCC concurred with the recommendations for site closure and removed Site SD029 from the Compliance Plan, which was approved 6 January 2000. A deed certification was filed in the Deed of Records of Taylor County 11 July 2000.

SS042 (Background Boring 2 {NR)): Site SS042 is located on the eastern portion of the base, near Base housing. During a Phase I investigation, the location was selected for investigation as a background location because it was not believed to have had contamination in the area. However, bromomethane and chloromethane were reported in the upper 15 feet of soil at concentrations ranging from 1,I00 micrograms per kilogram (µg/kg) to 2,700 µg/kg and from 1,400 µg/kg to 4,300 µg/kg, respectively. Constituent concentrations were thought to be a result of previous storage of air conditioning units onsite. Sampling for SS042 indicated that these constituents did not exceed TNRCC MSCs.

Additional investigation results indicated that PAHs (chrysene, pyrene, and benzo(a)anthracene) and chromium were reported in soil samples collected from the site. Chromium was reported at concentrations exceeding the TNRCC MSC. Additional investigation was performed, and results indicated that the constituent concentrations initially identified in site soil were isolated detections. However, the most recent investigation results from the 1995 Final Interim RFI Report were unavailable for review. The 1996 Dyess AFB Corrective Action Management Plan states that no further action is anticipated at SS042. Additionally, the 1997 Management Action Plan states that the site was recommended for soil closure under RRS 2 and that closure was approved. No documentation of deed recordation for Site SS042 was identified as part of this

FYR.

1.2 Policy and Requirement Statements

It is the policy of the Air Force to use innovative and sustainable approaches to environmental management and technology to accomplish its mission. Sustainable projects do not deplete resources, cause environmental degradation, or impact to human health and may reduce the burden of compliance for the Air Force. Mission requirements are met while also balancing cost and environmental responsibility. The Contractor shall incorporate pollution prevention and sustainability initiatives into all aspects of this contract.

The Contractor shall function as an integral team member in support of the Air Force Civil Engineer Center (AFCEC) mission and Dyess AFB mission to include sharing of information with other AFCEC contractors, and cooperation with communities, regulators, and other government entities.

Requirements include efficient management of this contract including, but not limited to, the submission of accurate, on-time, quality contract deliverables and timely identification and solution of impediments to successful project execution. Technical requirements include, but are not limited to, early involvement in the process to allow for the development of the most cost effective and technically sound approach or solution. The AFCEC will rely on the Contractor's expertise in recognizing and addressing problematic issues and successful execution of this contract. The Contractor shall perform all work in accordance with federal, state, and local statutes and regulations. Remedies shall conform to environmental permits, decision document requirements, and other legal requirements.

Section 6.10.5 Long-Term Management (LTM) Dyess AFB:

Proiect: FNWZ20197800-Land Use Controls fLUCs) Inspections and Reporting The Contractor shall conduct LUCs site inspections and reporting for Sites DP043, FTOOI, FT002, LF004, LF013, OTOl l, OT031, OT035, SD007, SD020, S0025, S0028, SD029, SS042, ST032, and WP005. Field activities shall be conducted in accordance with the LUC Implementation Plan (LUCIP). Specifically, the Contractor shall perform the following activities:

· LUCs Monitoring and Enforcement

· Conduct annual site inspections at Sites DP043, FTOOI, FT002, LF004, LF013, OTOI l, OT031, OT035, S0007, 80020, SD025, S0028, SD029, SS042, ST032, and WPOOS.

· Prepare and submit annual reports and certifications (CDRL A00lg)