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C A M B R I A Ms. Michelle Le
<br /> June 3, 2005
<br /> alcohol [TBA], di-isopropyl ether, ethyl tert-butyl ether, tert-amyl methyl ether, and methyl
<br /> tertiary butyl ether)by EPA Method 8260B. Sample TP-10 was also analyzed for total petroleum
<br /> hydrocarbons as diesel (TPHd) by EPA Method 8015 (Modified), polychlorinated biphenyls
<br /> (PCBs) by EPA Method 8082, chlorinated hydrocarbons by EPA Method 8260B, and CAM 17
<br /> Metals by EPA Methods 6010B and 7471A. Samples were analyzed by State-certified Kiff
<br /> Analytical, LLC, of Davis, California or Severn Trent Laboratories, Inc. of Pleasanton,
<br /> California. The laboratory reports are included as Attachment B.
<br /> Pea Gravel Re-use: All pea gravel removed during UST, product piping, and dispenser removal
<br /> activities was stockpiled and stored on site. On March 25, 2005, under the direction of Michele
<br /> Le of the SJCEHD, Cambria field staff sampled approximately 500 cubic yards of pea gravel
<br /> (SP-2-1, SP-2-2, SP-2-3, SP-24, and SP-2-5). The samples were analyzed for TPHg, BTEX, and
<br /> lead. Based on the analytical results, the pea gravel was re-used by Paradiso. The certified
<br /> analytical laboratory report is included in Attachment B.
<br /> Soil Disposal: Approximately 333 tons of soil were generated during field activities, temporarily
<br /> stored on site, and covered with plastic sheeting. The soil stockpile was sampled and profiled for
<br /> disposal. The laboratory report is included in Attachment B. On April 11, 2005, Manley and
<br /> Sons Trucking, Inc. of Sacramento, California transported the soil to Allied Waste Industries'
<br /> Forward Landfill in Manteca, California for disposal as non-hazardous waste. Disposal
<br /> confirmation is included as Attachment C.
<br /> ANALYTICAL RESULTS
<br /> Cambria summarizes soil analytical results in Tables 1 and 2. The laboratory analytical reports
<br /> are included in Attachment B. A summary of these data is presented below.
<br /> Four samples collected from the UST excavation contained TBA at concentrations ranging from
<br /> 0.0051 to 0.12 parts per million (ppm). No TPHg, BTEX, or fuel oxygenates other than TBA
<br /> were detected in any samples collected from the UST excavation. Over-excavation samples did
<br /> not contain any petroleum hydrocarbons or fuel oxygenates.
<br /> The soil sample collected from beneath the waste oil UST contained 0.751 ppm arsenic, 20.9 ppm
<br /> barium, 3.93 ppm chromium, 1.65 ppm cobalt, 7.68 ppm copper, 2.31 ppm lead, 1.70 ppm nickel,
<br /> 8.91 ppm vanadium, and 19.9 ppm zinc. No TPHd, TPHg, BTEX, fuel oxygenates, PCBs, or
<br /> chlorinated hydrocarbons were detected in soil beneath the waste oil UST.
<br /> No petroleum hydrocarbons or fuel oxygenates were detected beneath the dispenser or piping
<br /> areas.
<br /> 3
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