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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K Heran,R.E.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellan,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> KAREN PETRYNA SEP 0 9 2003 <br /> EQUILON ENTERPRISES LLC <br /> P O BOX 7869 <br /> BURBANK CA 91510-7869 <br /> RE: SHELL SERVICE STATION SITE CODE: 1746 <br /> 880 VICTOR ROAD <br /> LODI CA 95240 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Gmundwater <br /> Monitoring Report—SecondQuarter 2003 dated August 13, 2003 and Groundwater Monitoring <br /> Repor7—FirstQuarter2003 dated May 13, 2003 prepared by Cambria Environmental <br /> Technology, Inc. (Cambria). In the reports, Cambria requested reduction of analyses for <br /> Total Petroleum Hydrocarbon as gasoline (TPH-g),benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) of all site wells from quarterly to annual basis. <br /> EHD approves Cambria's request to reduce analyses of TPH-g and BTEX to an annual <br /> basis with conditions. <br /> 1) The analytical schedule of TPH-g and BTEX must be reverted back to quarterly <br /> basis when EHD determines that sufficient reduction of dissolved oxygenate <br /> concentration has occurred in the groundwater,and the detection limits of <br /> TPH-g and BTEX could be reduced to an acceptable level. <br /> 2) TPH-g and BTEX is det4ected at a concentration suggesting a change of <br /> conditions, or, <br /> 3) Site circumstances raise a concern that a separate release has occurred. <br /> Donna Heran,REHS,Director <br /> Environmental Health Department <br /> � <br /> Jeffrey Wong, Senior REHS Nuel C. Henderson,Jr.,RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> C: CRWQCB, Central Valley Region—James L. L. Barton,RG r <br /> C: Cambria Environmental Technologies, Inc.—Aubrey Cool <br />