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Soil Sampling Report - Chevron Service Station #9-3232, Stockton, CA
<br />April 28, 1999
<br />Stockpile Sampling Associated with UST Removal
<br />On March 11, 1999, GR personnel collected eight discrete disposal characterization samples, labeled
<br />SP -1 through SP -8, from approximately 200 cubic yards of stockpiled pea gravel backfill initially
<br />excavated from the gasoline UST pit prior to UST removal. Two discrete samples, labeled SP -9 and
<br />SP -10, were collected from approximately 40 cubic yards of stockpiled soil excavated from the waste
<br />oil UST pit. Four discrete samples, labeled SP -1 I through SP -14, were collected from approximately
<br />100 cubic yards of stockpiled pea gravel backfill excavated from the gasoline UST pit following UST
<br />removal.
<br />These samples were analyzed for TPHg, BTEX, MtBE, and oxygenate compounds by EPA method
<br />8260. In addition, samples SP -4 and SP -9 were also analyzed for TPHd, HVOCs, PCBs, and the
<br />metals cadmium, chromium, lead, nickel, and zinc. Sample SP -10 was also analyzed for TPHd,
<br />HVOCs, SVOCs, O&G, and the metals lead, antimony, arsenic, barium, beryllium, cadmium,
<br />chromium, cobalt, copper, mercury, molybdenum, nickel, selenium, silver, thallium, vanadium, and
<br />zinc.
<br />SOIL DISPOSAL
<br />Based upon the analytical results, and per the approval of Ms. Margaret Lagorio of the SJCEHD,
<br />approximately 300 cubic yards of pea gravel backfill (represented by samples SP -1 through SP -9 and
<br />SP -11 through SP -14) were reused as backfill in the former UST excavations. On March 22, 1999,
<br />Allwaste Transportation and Remediation Inc. (Allwaste) of San Martin, California, transported
<br />approximately 40 cubic yards of soil (represented by sample SP -10) to the BFI's Vasco Road disposal
<br />facility in Livermore, California, for disposal..
<br />346463.03
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