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EA Engineering,Science,,..l Technology EA Western Regional Operations <br /> 41 Lafayette Circle <br /> Lafayette,CA 94549 <br /> Telephone:415-283-7077 <br /> Fax.415-283-3894 <br /> 24 June 1991 <br /> Harlin Knoll, RESH RECEIVED <br /> San Joaquin County Public Health Services <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201 J U N 2 6 1991 <br /> ENVIRONMENTAL HEALTH <br /> RE: Report of Well Installation PERMIT/SERVICES <br /> Former Exxon Retail Site (RS) 7-3942 <br /> 4444 North Pershing Avenue <br /> Stockton, California <br /> Dear Mr. Knoll: <br /> At the request of Exxon's environmental engineer Debbie Hams, I am sending you EA's Report <br /> of Well Installation for former Exxon RS 7-3942. This report covers the installation and <br /> sampling of monitoring wells MWll and MW12, groundwater recovery well RW4, vapor <br /> extraction wells VI-V4, soil vapor monitoring wells PSVT and PSV2, piezometers PI and P2, <br /> and injection well IW 1. Each of the wells was installed as part of the implementation of the site <br /> remediation plan approved by your office. <br /> The downgradient monitoring wells MWll and MW12 contained no concentrations of total <br /> petroleum hydrocarbons (TPH) as gasoline or benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX) in the soils or groundwater greater than the respective detection limits. As we discussed <br /> over the telephone, the second round of sampling for downgradient monitoring well MW l l <br /> showed no concentrations of TPH as gasoline or BTEX in the groundwater greater than the <br /> respective detection limits. A copy of the analytical report is enclosed for your records. <br /> If you have any questions regarding this project, please call me or Terry Winsor at the above <br /> number. <br /> Sin ly, <br /> Douglas E. Oram, Ph.D. <br /> Project Manager <br /> DEO/ds/�2.ot <br /> Enclosure <br /> cc: Debbie Harris, Exxon <br /> James Maughn, CVRWQCB <br /> Ms. Filippi, PRP <br /> Robert Friedberger, Bank of Stockton <br /> Robert Miller, Luckey Company <br />