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Pacific Gas and Electric Company Stockton D s on �,. . <br /> .i!!:a r� <br /> { 4040 West Lana p:1{;laver <br /> PO Box 9?0 <br /> )!Ocklu,CA T5:1[13 <br /> 21 09;9.1 . X4;0 5 Iry�4i <br /> ENVIRG-ME 1TAL HEALTH <br /> 1`EF`Y11Tf��E!,t'liCtS <br /> t <br /> August 29, 1988 <br /> i <br /> Ms. Laurie Cottula <br /> San Joaquin County Local Health District <br /> 1601 E. Hazelton Avenue <br /> Stockton, Ca. 95201 <br /> Dear Ms. Cottula: <br /> i <br /> On July 30, 1988, PG&E submitted a copy of the report <br /> "Characterization of the Tracy Service Center llndergrot�nd Tank Site" <br /> dated June, 1988 to the San Joaquin County Local Health District <br /> (SJCLHD). At that time, it was indicated that the SJCLHD would be <br /> kept informed of further work associated with this investigation. <br /> PG&E has now completed the review of the data from the Tracy Service <br /> Center underground tank investigation. Due to the limited extent of <br /> 17 petroleum range hydrocarbons found in the soil and non-potable <br /> < qlrDvn.dwater, it is recommended that a monitoring program be <br /> established at this time. <br /> PG&E proposes the following: <br /> i <br /> Install two additional monitoring wells (OW-•7 , OW-8) in the upper <br /> aquifer, down gradient from OW-6 (See attached map). <br /> Sample wells OW-7 and OW-8 on a semi-annual basis for the following <br /> constituents: total petroleum hydrocarbons , benzene. toluene, <br /> ethylbenzene, and xylene. <br /> Sample results will be reviewed by PG&E and forwarded to the SJCLHD <br /> within 30 days of each sampling date. <br /> The methods for installing and sampling the wells will be the same <br /> as described in the above referenced report. <br /> s <br />