Laserfiche WebLink
0 <br /> SECOR www.secorcom <br /> INTERNATIONAL 57 Lafayette Circle,2nd Floor <br /> S E" COR INcor pl�r r E tt ` -21g1gtnf15 9 <br /> g.,M?T02 'Fnx <br /> X03 JUL. J 6 TM 12=:22 <br /> July 9, 2003 <br /> Mr. Mike Infurna <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> RE: Groundwater Monitoring Well Abandonment Report <br /> Tower Park Marina . <br /> 14900 West Highway 12, Lodi, California <br /> Dear Mr. Infurna: <br /> On behalf of Westrec Marinas, SECOR International Incorporated (SECOR) is submitting this <br /> Groundwater Monitoring Well Abandonment Report describing the destruction of five groundwater <br /> monitoring wells at Tower Park Marina, located at 14900 West Highway 12 near Lodi, California. The <br /> wells were abandoned by over-drilling on July 2, 2003. <br /> 4 <br /> The abandonment of the groundwater monitoring wells was requested by the California Regional <br /> Water Quality Control Board (RWQCB), Central Valley Region, in their letter dated March 21, 2003. <br /> This report has been prepared to document the destruction of the groundwater monitoring wells and <br /> to expedite the designation of'No Further Action'status for the site. <br /> SITE BACKGROUND <br /> The site is an operating marina located at 14900 West Highway 12 near Lodi, California (see Figure <br /> 1). The marina is situated on a levee adjacent to Potato Slough, a tributary of the Mokelumne River. <br /> The site has utilized aboveground storage tanks (ASTs) for refueling automobiles and boats, and a <br /> past release of petroleum hydrocarbons to the subsurface was observed during conveyance piping <br /> upgrade activities in 1991. Subsequent investigation activities identified the presence of free-phase <br /> petroleum hydrocarbons within the levee and five groundwater monitoring wells were installed in <br /> 1993 (see Figure 2). Periodic groundwater monitoring and sampling was initiated at this time. <br /> Historically, the highest concentrations of petroleum hydrocarbons and related constituents have <br /> been reported in wells MW-3 and MW-4 in the vicinity of the former gasoline dispenser and <br /> underground conveyance piping. In correspondence dated March 21, 2003, RWQCB staff noted <br /> that, although concentrations of petroleum hydrocarbons exceed applicable water quality objectives <br /> (WQOs), the remaining groundwater impacts are limited and WQOs are expected to be achieved in <br /> a reasonable amount of time. Therefore, the RWQCB authorized the permitted abandonment of the <br /> groundwater monitoring wells at the site. Following receipt of confirmation from the San Joaquin <br /> County Environmental Health Department that the wells were properly destroyed; the RWQCB will <br /> issue a 'No Further Action' letter for Tower Park Marina. <br /> a <br /> IATower Park\Well Destruction\Well Destruction Report.doc SECOR International Incorporated <br /> SECOR Job No.050T.02926.02 July 9,2003 <br />