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y <br /> ENVIRONMENTAL HEALTH EPA TME T <br /> °"'" SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> e " Donna K.Heran,R.E.H.S. <br /> 304 East Weber Avenue,Third.Floor Carl Dargrnan,R.E.l-I:s. <br /> Director Mike Huggins,R.E H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.> .H.S. <br /> t� <br /> Pro rarnManae -3420Telephone: {209}468 Margaret La oria,R.E:H.S. <br /> 4r.fi6aLaurie A.-Cotulla,R.E.H.S• Robert McClellon,R.E.H.S. <br /> Program Manager Fax; {209}A 64-0138 <br /> Mark Barcellos,R.E.H:S. <br /> NOV 10 2004 <br /> KASHMIR SINGH & DALWINTDER DHOOT <br /> 15600 S HARLAN ROAD <br /> LATHROP CA 95330 <br /> RE: Joe's Place SITE CODE: 231585 <br /> 15600 Harlan Road <br /> Lathrop, Ca <br /> On November 9, 2004, a meeting was held at the office of San Joaquin County <br /> Environmental Health Department (EHD)to discuss the above referenced site. <br /> Those in attendance were Nuel Henderson and Margaret Lagorio from END, <br /> James Barton from Central Valley Regional Water Quality Control Board <br /> (CVRWQCB), Gowri Kowtha and Steven Carter from Stratus Environmental, Inc. <br /> and Daiw rider Dhoot. EHD had previously reviewed the "Subsurface <br /> Assessment Report" (SAR) dated August 11, 2004, and the "Dual Phase <br /> Extraction Test Report" (DPET) dated September 28, 2004, prepared by Stratus <br /> Environmental Inc. and discussed the report summaries and recommendations <br /> with the CVRWQCB. The meeting was to discuss the need for further <br /> investigation and remediation of the site. This letter is to document items <br /> discussed at the meeting. <br /> Stratus stated in the SAR that the lateral and vertical extent of the contamination <br /> in the soil and the groundwater appeared to be adequately characterized. EHD <br /> and the CVRWQCB require that the MTBE detected in CPT-5 and CPT-8 be <br /> further investigated by installation of monitoring wells. Stratus stated in the <br /> DPET that dual phase extraction appeared to be technically viable but did not <br /> appear to be cost effective. EHD and RWQCB require that some active <br /> remediation be performed to reduce the MTBE concentrations on site so than it <br /> will not continue to migrate off site. <br /> The remediation should be performed in the on site areas having the highest <br /> levels of MTBE in the groundwater. Groundwater extraction, air sparging and <br /> ozone sparging should all be considered as remedial options. if ozone sparging <br /> is proposed, a bench scale test must be performed to determine any waste <br /> discharge requirements by the CVRWQCB. Please contact the CVRWQCB for <br /> their requirements. A Corrective Action Plan cannot be prepared until the extent <br /> of contamination has been defined and remedial alternatives have been <br /> evaluated. Interim remediation can be performed during this period of remedial <br /> alternative testing and evaluation. <br />