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__. _•. .... ....+.vv �c� atu arc oro.. k3mviuLlim"AICK lni.n igjUUz'?VUj <br /> f....._ % .17 <br /> �❑ <br /> GROUNDWATER <br /> ❑� TECHNOLOGY, INC. 3401 HalyratdDrive.Suit�lAQ,iA�Cst 5at�atateritu.CA 9156${9161372�1TQ0 <br /> FAX(916)372.8781 <br /> Nwembsr 5, 1994 Project No.02020 3767 <br /> Ms. Lourie A. Cotulla <br /> REKS, Program Manager <br /> San Joaquin County Punic Health Services <br /> 16DI East Hazelton Avenue <br /> Stockton, California 95205 <br /> SUBJECT: SOUTHLAND STORE NO. 20304' <br /> 453 GRANT UNE ROAD <br /> TRACY, CAUFORNIA <br /> Dear Ms. Caotuk: <br /> Groundwater Technology, Inc. has prepared bila letter on behalf of The Srfuthiand Corporation to <br /> request abandomunarrt of selected wells, and rescheduling of other wefts to annual sampling at the above <br /> referenced site (Figure 2). The results of quarterly groundwater sanding conducted at the site over the <br /> past several years reveal that many of the wells continue to remain below laboratory rrmthod detection <br /> Bnft (MDL) for dissolved benzene, toluene, ethylbenzene, and xylenes (BTEX),and tortai petroleum <br /> hydrocabons-as-gasoline (TPH-G). Welts MW-4,6, 11, 17, 13, 14, and 15 have never had dissolved <br /> hydrocarbon concent atione above the MDI-s. Similarly,MW-2, MW-3, and MM have had orgy one or <br /> two reported BTEX or TPH-jG concentrations at or slightly exceeding the MDLs (fable 1). <br /> Due to the current monitoring well array. an overt:overage of the "zero-line"for dissolved petroleum <br /> hydrocarbons exists to the north-northeast and south of the dissolved plurne center (around MW-10). <br /> Groundwater Technology requests approval for abwWonrnent of wells MWA2. MW-13, MWA4. and <br /> MVV 15 across the northemr extent of the property. The zero-line can be adequately defined in ails <br /> area by monitoring and sampling MW-5,which has remained below MDL,s for several consecutive <br /> quarters (Table 1). MW4 to the south(upgradierrty of the plume center has never had reported <br /> concentrations for dissolved petroleurn hydrocarbons and sixfold be atfarrdoned as well. <br /> Of the remaining perimeter wells (MW 2. MW-3, MW-5, MW-6, and MW-11), R Is requested that these <br /> wells be switched to an annual groundwater sarv#Ing schedule due to consistent nondetectable levels. <br /> The remaining wells at the site would continue to be sampled on a quarterly schedule. <br /> Offir s Mrwphou!the U3.Caw&uad Ovo-ge s <br />