Laserfiche WebLink
CAMBRIA <br /> Sep17, 20 <br /> Mr. Jeffrey Wong <br /> San Joaquin County Environmental Health Department S D <br /> 304 East Weber Avenue, Third Floor EP 202004 <br /> Stockton, California 95202 ENVIRpNO <br /> Site Investigation Work Plan <br /> PER671e RV1aE§THEAL�� <br /> Re: g <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> a: <br /> Stockton, California <br /> SAP Code 136143 <br /> Incident No. 98996183 <br /> SJCEHD Site No. 1760 <br /> Dear Mr. Wong: <br /> Cambria Environmental Technology, Inc. (Cambria) prepared this work plan on behalf Equilon <br /> Enterprises LLC dba Shell Oil Products US (Shell) to further assess the extent of gasoline <br /> constituents in soil and groundwater beneath the referenced site as requested in San Joaquin <br /> County Environmental Health Department's (SJCEHD's) August 26, 2004 letter. The scope of <br /> work presented in this work plan complies with SJCEHD and Central Valley Regional Water <br /> Quality Control Board guidelines. <br /> Site Location and Description <br /> The subject property is an operating Shell-branded service station located at 4315 Waterloo Road <br /> in a commercial area of Stockton, California (Figure 1). The station layout includes two double- <br /> walled fiberglass underground storage tanks. (USTs), two dispenser islands, a service station <br /> building, and a car wash(Figure 2). <br /> Previous Investigations <br /> 1994 UST Removal: During December 1994, four single-walled steel USTs (two 5,000-gallon, <br /> one 7,000-gallon, and one 8,000-gallon) and associated product piping were removed. Petroleum <br /> hydrocarbons were detected in soil samples collected from the former UST excavation. Over- <br /> excavation was performed and additional soil samples were collected. One soil sample collected <br /> Cambria <br /> Environmental from the excavation sidewall at 14 feet below grade (fbg) contained 380 parts per million (ppm) <br /> Technology,Inc. total purgeable petroleum hydrocarbons as gasoline (TPHg). Two soil samples collected at <br /> depths of 4.5 and 6 fbg from the dispenser island areas contained 1,600 and 1,700 ppm TPHg. <br /> 5900 Hollis Street <br /> Suite A - <br /> Emeryville,CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br /> ,t^ <br /> A.:e <br />