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- Industrial Developments International,Inc. Massie Park UST Removal Page 2 removal of the UST at this time. The final excavation associated with the UST was approximately 12 feet ., by 12 feet by six feet deep. The soil in the excavation generally consisted of a light to medium gray-brown clayey silt with small r isolated areas of dark gray-brown clayey silt, suggesting higher organic matter content. Grain size range is fairly consistent with some sand-sized grains observed in the predominantly silt-sized soil. No larger grains were noted. The site soils consist of alluvial deposits and are derived from a variety of regional rock types. ► There was no hydrocarbon odor associated with the soil exposed during the excavation. Groundwater was not encountered in the excavation. ► Observation of the exterior of the UST after removal indicated that the tank was of steel fabrication with an asphalt coating and appeared to be in good condition. Only slight corrosion and no pitting or holes were noted on the surface of the UST and its structural integrity was intact. No odors were noted and no staining ► was observed. The UST was hauled off-site by West Coast Equipment and transported to Turlock, California, for scrapping. 3.0 SOIL SAMPLING Following removal of the UST, soil samples were collected from locations selected by Ms. Sterni-Le of the SJCEHD. Soil sample locations are shown in Figure 3 in Appendix A. i.. • Soil sample 3523D-TKI-8' was collected from beneath the center of the UST at a depth of two feet below the UST location, approximately eight feet below ground surface(bgs). ► • Soil sample 3523D-EP-0-6" was collected from the excavation soil stockpile to the east of the UST location. • Soil sample 3523D-WP-0-6" was collected from the excavation soil stockpile to the west of the UST location. The soil sample collected from the UST excavation was obtained by manually driving a clean brass tube �. into soil brought to the surface in the backhoe bucket. The soil samples collected from the stockpiles were obtained by manually driving a clean brass tube into the piles. The soil samples were immediately sealed with Teflon* sheeting, capped, labeled, and placed in a cooler chilled with ice. The soil samples were hand .. delivered following chain-of-custody procedures to Argon Laboratories, Inc., in Ceres, California, for analyses. .. 4.0 LABORATORY ANALYSES The laboratory performed 2:1 compositing of the soil samples collected from the stockpiles (sample ` 3523D-WP-0-6" & 3523D-EP-0-6"). The samples were analyzed for TPH-G and BTEX by EPA Method 8020, TPH-D by EPA Method 8015m, oxygenates including methyl-tertiary-butyl ether (MTBE) by EPA Method 8260, and total lead by EPA Method 7420. ` 5.0 LABORATORY ANALYTICAL RESULTS The laboratory analytical results indicate that none of the requested analytes were detected at or above the ., laboratory reported detection limits in any of the soil samples, except lead. The results of the laboratory analyses are presented in Table 1, on the next page. Laboratory analytical methods used, detection limits, ► i% CONDOR