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I <br /> i, EnvirOmega Consultants <br /> 16732 Pa/mero Drive <br /> San Diego, California 92128 <br /> L (619) 676-0046 <br /> I <br /> November 8, 1996 <br /> t San Joaquin Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, Third Floor <br /> P.O. Box 338 <br /> Stockton, CA 95201-0388 <br /> 1 Attention: Mr. Harlin Knoll <br /> Subject: Work Plan for Hydropunch Services <br /> Sacramento Insulation Contractors <br /> 1722 East Flora <br /> Stockton, California 95205 <br /> EOC Project No. EOC-96-028 <br /> L <br /> = Dear Mr. Knoll, <br /> At the request of Sacramento Insulation Contractors (SIC), EnvirOmega Consultants (EOC) has <br /> prepared the following brief work plan to perform environmental services for the site located at <br /> 1722 East Flora in Stockton, California. The proposed services include the advancement of soil <br /> borings, the collection and analysis of soil samples, and the Hydropunch collection and <br /> laboratory analysis of groundwater samples from each borehole. The location of the site is <br /> r presented on the Vicinity Map, Figure 1. <br /> t.. <br /> Summary of Background Information <br /> L 'Blaine Tech Services Inc. of San Jose, California, removed a 1,000 gallon underground storage <br /> tank (UST) from the subject site on November 1, 1988. The UST, which reportedly stored <br /> gasoline, was inspected following the removal by Ms. Kasey Foley from the San Joaquin Public <br /> L Health Services, Environmental Health Division (PHS). During Ms. Foley's inspection, holes <br /> were observed in the tank. Additionally, Ms. Foley directed the collection of one soil sample from <br /> beneath the UST at a depth of 13 feet below the ground surface (bgs). This soil sample <br /> L contained a total petroleum hydrocarbon (TPH) concentration of 57 milligrams per kilogram <br /> (mg/kg) and was quantified as gasoline. This soil sample also exhibited benzene, toluene, <br /> ethylbenzene, xylenes (BTEX) and organic lead concentrations above their respective detection <br /> limits. These contaminant concentrations appear to "exceed the allowable limits of leaching <br /> potential as identified in the LUFT Manual". <br /> S <br /> L. A few months after the removal of the UST, and when not informed by the PHS that they were <br /> required to perform additional environmental services on the site, SIC backfilled the tank <br /> t excavation to the ground surface with clean soil obtained from another area of the site. <br /> t✓ <br /> 1 <br />