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W,ry <br /> * Emcon Associates <br /> 1433 North Market Boulevard •Sacramento California 95834 1943 • (916)928-3300 • Fox'(916)'928-33`41 ' <br /> J+ . 21 P 1.1 1 ` 0 5 <br /> July 27, 1994 <br /> Project 2520-100 01 <br /> Mr Jerry Moore <br /> Moore Petroleum, Inc <br /> P O Box 67 <br /> Banta, California, 95304 <br /> Re Second Quarter 1994 Groundwater Monitoring Report, Frank's Exxon #4, <br /> 14800 West Frontage Road, Manteca,California,Federated Clain No 83Z-159 <br /> Dear Mr Moore <br /> This letter report presents the results of the second quarter 1994 groundwater monitoring <br /> event for the Frank's Exxon #4 service station, located at 14800 West Frontage Road, <br /> Manteca, California (see Figure 1) Groundwater sampling for the second quarter 1994 <br /> monitoring event was conducted on May 16, 1994, by EMCON Associates (EMCON) <br /> consistent with the sampling and analysis procedures described in Appendix A <br /> BACKGROUND <br /> The project site is located on the west side of State Highway 99, on the northern outskirts <br /> of Manteca, California, in a commercial/agricultural area Frank's Exxon #4 is an active <br /> service station Aegis Environmental (Aegis) began quarterly monitoring groundwater at <br /> the site in January of 1991 EMCON assumed quarterly monitoring activities in March <br /> of 1994 <br /> Earth Treatment Systems, Inc , (ETC) installed two groundwater monitoring wells(MW-I <br /> and MW-2) at the site in August of 1988 Low concentrations of petroleum hydrocarbons <br /> were detected in both groundwater and soil samples collected from MW-1 and MW-2 <br /> Delta Environmental Consultants, Inc , (Delta) installed wells MW-3 and MW-4 in April <br /> and May of 1989 Low to moderate concentrations of petroleum hydrocarbons were <br /> detected in soil and groundwater samples collected from MW-3 and MW-4 Three <br /> 10,000-gallon underground fuel storage tanks (USTs) were removed from the site in <br /> November 1989 Petroleum hydrocarbons were detected in soil samples collected from <br /> beneath the USTs and product lines Groundwater monitoring wells MW-5 through MW-8 <br /> were installed by Delta in November and December 1989, and well MW-9 was installed <br /> by Aegis in November of 1991 Minimal impact to soil and groundwater was noted in the <br /> samples collected from wells MW-5 through MW-9 <br /> 1 <br /> l <br /> SACRJ12N2520\25201000 las 94 pas 3 <br />