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,.i 06 April 1999 AGE-NC Project No. 98-0460 Page 2 of 6 for holes and overall condition upon removal. The removed USTs were transported by West Coast Equipment to Turlock for recycling as scrap metal. The manifest for transport and disposal of the rinse water, dry ice purchase receipt and UST disposition tracking records are included in Appendix A. Due to the presence of a thick concrete slab,the product piping was not removed. Abandonment and piping sampling is described in Section 3.3.,below. The locations of the USTs and product piping runs are illustrated on Figure 2. ` 3.2. UST REMOVAL SOIL SAMPLING ` Immediately following removal of the USTs, soil samples were collected from approximately two feet below the former UST inverts. A hand auger was also used to collect one soil sample from approximately two feet beneath the diesel dispenser location. Sample locations were specified by the PHS-EHD. Three samples were also collected from the soil stockpiled on-site. Sample locations are illustrated on Figure 2. ►� The soil samples were collected in pre-cleaned 2-inch by 3-inch brass sleeves by a representative of Precision Enviro-Tech. Samples from beneath the USTs were collected from the backhoe/excavator bucket. The sample from beneath the dispenser was collected using a metric soil sampler. The ends ` of each brass sleeve were covered with Teflon sheets, capped and sealed with tape. The samples were then labeled, stored on ice and transported under chain-of-custody to Precision Enviro-Tech (PET), a State of California Department of Health Services (DHS)-certified laboratory. 3.3. ADDITIONAL PRODUCT PIPING SOIL SAMPLING On 19 March 1999, a concrete corer was used to cut two holes in the concrete slab overlaying the product piping. A hand auger was then used to advance borings to a depth of nine feet bsg adjacent to the diesel dispenser(PI) and to a depth of five feet bsg at the bend in the product piping(P2). Soil borings could not be advanced further due to very hard soil encountered at nine feet bsg. Soil samples were collected at a depth of five feet bsg in both borings and at a depth of nine feet bsg adjacent to the dispenser,using a metric soil sampler loaded with pre-cleaned 2-inch by 3-inch brass sleeves. Samples were preserved and stored as described in Section 3.2., above. Samples were ` transported under chain-of-custody to Alpha Analytical Laboratories, Inc. (AAL), a DHS-certified laboratory. Adranaed GeoEnvironmcn(al.Inc.