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C AMB R I A Mr Steven Shih June 20, 2005 excavation in the vicinity of the western dispenser (8 feet long by 8 feet wide by 7 feet deep) and below piping between the western dispenser and the USTs (5 feet long by 5 feet wide by 10 feet deep) These approximate extents of over-excavation are shown on Figure 4 In the vicinity of the north and eastern dispensers, Cambria collected 10 sidewall samples (5-5-12, 5-6-12, 5-7-12, 5-9-12, 5-10-12, 5-11-12, 5-12-7, 5-13-7, 5-14-7, and 5-18-11 5) at depths ranging from 7 to 12 fbg, 2 samples beneath the dispensers (D-2-12 and D-3-12) at 12 fbg, and 5 samples from the bottom of the over-excavation (5-4-12, 5-8-12, 5-154, S-16-7 and 5-17-7) at depths ranging from 4 to 12 fbg Note that the soil in some of these locations (5-12-7, 5-13-7, 5-15-4, and 5-16-7) was removed during the over-excavation activities (as indicated by shading in Table 1) Therefore, these results do not represent soil that remains in place beneath the site Cambria collected three stdewall samples (5-1-7, 5-2-7, and 5-3-7) and one bottom sample (D-1-7) in the vicinity of the western dispenser and one bottom sample (P-6-10) in the area between the western dispenser and the USTs Note that this is the location of piping sample P-7-5, and the over-excavation sample was mislabeled "P-6 " Figure 4 shows the sample locations Soil samples were collected in the manner described above Chemical Analyses All soil samples were analyzed by EPA Method 8260B for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX), and methyl tertiary butyl ether (MTBE) by State-certified Severn Trent Laboratories, Inc of Pleasanton, California or Kiff Analytical LLC of Davis, California Pea Gravel Re-use All pea gravel removed during UST, product piping, and dispenser removal activities was stockpiled and stored on site On March 18, 2005, under the direction of Steven Shih of the SJCEHD, Cambria field staff sampled approximately 300 cubic yards of pea gravel (PG-1 through PG-12) Sample locations are shown on Figure 2 The samples were analyzed as described above Based on the non-detect analytical results, the pea gravel was re-used by Paradiso The certified analytical laboratory report is included in Attachment B Soil Disposal• Approximately 410 tons of soil were generated during field activities, temporarily stored on site, and covered with plastic sheeting The soil stockpile was sampled (SP-1 and SP-3) and profiled for disposal The certified analytical laboratory reports are included to Attachment B Between March 30 and May 5, 2005, Manley and Sons Trucking, Inc of Sacramento, California transported the soil to Allied Waste Industries' Forward Landfill in Manteca, California for disposal as non-hazardous waste The disposal confirmation reports are included as Attachment C 3