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MR <br /> CAMBRIA <br /> 2 P�� 12. 06 <br /> July 20, 1999 <br /> Mr. Jeffrey Wong <br /> San Joaquin County Public Health Services ENVIRONMENTAL HEALTH DIVISION <br /> Environmental Health Division 304 E. Weber Ave. Third Floor <br /> 304 East Weber Avenue, Third Floor P O. Box 388, Stockton CA 95201-0388 <br /> Stockton, California 95202 Approved <br /> Denied ❑ <br /> Re: Site Investigation Work Plan Conditions ,S�c ae ( 0 L'_) <br /> Shell-branded Service Station <br /> 4315 Waterloo Road Date��0 �4 q by <br /> Stockton, California <br /> SAP Code 136143 t,INSTI' LL M fit( AF-T69 D*PtI-� -Tb WRTcR HAS S7 N Zl0 At-1•G-A <br /> Incident #98996183 F►1JJCOVNTCR JNA' �-'195T WATER <br /> 2 , 5C(,CCioN O� $AM�U�s To BS ANALYZt✓9 mosT /NCLODC- <br /> Dear Mr. Wong: trip ?A9614D CBMmEWT 9 <br /> 31 ACAL tCE MUST W- To CONTROL T6mP&e4-r7� Fo, <br /> Cambria Environmental Technology, Inc. (Cambria) prepared this work plan on behalf of S-fnnPC <br /> Equiva Services LLC (Equiva) in response to the San Joaquin County Public Health Services PQ666-04MC, <br /> Environmental Health Division (SJCPHS/EHD) May 10, 1999 letter recommending installing k, <br /> one groundwater monitoring well. The purpose of this investigation is to determine whether PFt� H D <br /> petroleum hydrocarbons or fuel oxygenates have impacted groundwater beneath the site.)I-r UCAST <br /> The scope of work presented in this work plan will comply with SJCPHS/EHD and Central Lt-g Hf1 , (N <br /> Valley Regional Water Quality Control Board (RWQCB) guidelines. — 5U3M11 APL"(" <br /> 1'Ec ANG` 6 & <br /> ?EP-AA T PfPPLICATI0AJ t364m6 worZr <br /> SITE BACKGROUND G i COMMF-N wd (�� $y S�:PTcMt' 5�9q <br /> Site Description: The subject property is an operating Shell-branded service station located at <br /> 4315 Waterloo Road in a commercial area of Stockton, California (Plate 1). The station <br /> layout includes two double-walled fiberglass underground storage tanks (USTs), two dispenser <br /> islands, and a service station building (Plate 2). <br /> According to SJCPHS/EHD, depth to groundwater in the area is estimated to be 60 to 65 feet <br /> below grade (fbg) and groundwater flows primarily towards the southeast. <br /> Oakland, CA <br /> Sonoma, CA Previous Investigations: During December 1994, four single-walled steel USTs (two 5,000- <br /> Portland, <br /> ,000- <br /> PortIand, OR gallon, one 8 000- allon and one 7 000- allon and associated product piping were removed. <br /> g g � g ) P P•P g <br /> Seattle, WA <br /> Petroleum hydrocarbons were detected in soil samples collected from the former UST <br /> Cambria excavation. Over-excavation was performed and additional soil samples were collected. One <br /> Environmental soil sample collected from the excavation sidewall at 14 fbg contained 380 parts per million <br /> Technology,Inc. (ppm) total purgeable petroleum hydrocarbons as gasoline (TPPH)• Two soil samples <br /> 270 Perkins Street collected at depths of 4.5 and 6 fbg from the dispenser island areas contained 1,600 and <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(7o7)935-4650 <br /> Fax(7o7)935-6649 <br />