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moved, Cobf ran 1.0 introduction On behalf Of the U.S. Army Environmental Command and the U.S. AM Carps of Engineers (USACEI Sacramento Distant, per Contract W91338-16-C-0013, Anna Environmental, Inc iAhtnai has red this Waste rp Characterization Work Plan the Shae Army Depart (Sharpe)She MW505 (SHADW] &P003). 1.1 Purpose A stabst«alty significant, Increasing trend of tricnorretbene (TCE) concentrations at MWSOSC within the well cluster (SHADdO & TOR), was reported in Section 3.3.5 of the federal Faclgees Progress — October 2014 — September 2015, Sharpe Army Depst, Cal&mm (UR$ 016). TM1 Work Plan Warbles locations warranting further characterization and madding g n the SHADu & -Doe ea and describes the a o investigate and characterize men and ex of TCE contamination n the g undwa[ t the s The data collected will be used to determine fun extent of groundwater contamination and reach a decision on the need Bar fmure activltMs at the Additionally, groundwater sampling efforts will provide groundwater quality data northwest of the base boundary and the leading edge of the NMM1 Balloon TICE groundwater plume and will support plans for optimization of the current remedial efforts. 1.2 She Location and Description Sharpept formerly operated by the DefenseLai Agencysupply all military services twith 'the equipment needed to fulfill their minions. Sharpe Is located In Califomla's primadly rural San Joaquin Valley In San Joaquin County, within the city limits m Lrthrap, a cmmmunNytl that was Incorporated in 1989. The unincorporated community of French Camp homers Latlemp o the northwest, and the city of Manteca Iromers Danny to the east. Nearby large urban ommmumides include the city of Sidman, approximately nine miles W the north, and the city of Modesto, approximately 20 mllessouth mthe depot (Figure 1). Led at Sharpe we madly a sun of form such as pain nipping. metal finishing and Pactivitiesmaintenance operations overhau hydmu cal repairs airframe and bodywork; andnco and reconditioning. These activities electrical the use of petroleum hydrocarbon fuehpand a variety of other industrial chemicals (e.g. chlon aced solvents). mica contaminated I stallatlon loll dgroundwater throughdely of fate -and es. Athorough discussion of the SHAD-007 & -008 h story and setting is reported in the Remedml Investiyadon/Feaslnley Study (ESE, 1990). Sharpe was placed on the National PBorDes Bat in 1987 and entered Into a four-party Federal Facility Agreement (FFA) In 1989 (United States Department of the Army, 1989). As deeribed In the FIFA, authority for emannermental restoration redeem making rests with a team of remedial prodem managers from the Californianntal protection Agency, Including Department of Toxic Substances Control and Central Valley Regional Water Quality Control Board, from the USEPA Region9, and from Sharpe. Defense Logktics Agency tmnsitioned Sharpe back to the AM effective October 1, 2014. The A Is the lead Agencyresponsible for funding and implementingmedial actions at Sharpe.The FFA established two operable its (UU) to facilitate emAronemal enmeshed at Shame. 1 addresses groundwater in four saturated monrtng ari zones (designated a A, B, C, and D)