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300 GERTRUDE <br /> PAGE 2 <br /> Two monitoring wells were installed south of the former underground storage tank(USI) <br /> site for the Marley Cooling Tower site. PHS/EHD previously recommended using <br /> information from these wells in the UST investigation. If information from these wells <br /> cannot be used to define the UST extent of contamination,then a work plan that will define <br /> the lateral and vertical extent of the contamination in the soil and in the groundwater should <br /> be submitted to PHS/EHD by September 15,2000. <br /> In addition,a 2000 feet well survey that includes a map of the well locations and any known <br /> well construction details should be submitted to PISS/EHD by September 30,2000. <br /> PHS/E HD recommends including the well survey as a part of a quarterly monitoring report <br /> (QMR) <br /> PHS/EHD recommends including a section proposing continuing or next phase of <br /> investigation or cleanup in all future QMR as recommended by Central Valley Regional <br /> Water Quality Control Board Appendix A to Tri-Regional Board Staff Recommendations. <br /> If you have any questions,please feel free to contact Jeffrey Wong at (209) 468-0335. <br /> Donna Heran,RENS,Director <br /> Environmental Health Division <br /> Co A�' <br /> Jeffrey Wong , REHS Margaret gorio,REFS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> c: RWQCB,Central Valley Region-Marty Hartzell <br /> c: ATC Associates Inc.- Tom Lutterman <br />