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KEI-P91-0202 .QR1
<br /> May 4 , 1992
<br /> Page 2
<br /> depth of approximately 11 feet below grade. Sample point locations
<br /> are as shown on the attached Site Plan, Figure 2 .
<br /> Also on February 20, 1991, KEI collected soil samples from the
<br /> product pipe trenches. Eleven samples, labeled P1 through P11,
<br /> were collected from the trenches at depths ranging from 2 to 3 . 5
<br /> feet below grade. In addition, at the direction of the San Joaquin
<br /> Local Health District, one soil sample, labeled P12 , was collected
<br /> from beneath the waste oil tank remote fill line at a depth of 2
<br /> feet below grade. These samples were also collected in the
<br /> presence of Ms. Foley. After soil sampling was completed, the pipe
<br /> trenches were excavated to the sample depths. Pipe trench sample
<br /> point locations are shown on the attached Site Plan, Figure 2 .
<br /> On March 19 , 1991, KEI returned to the site to observe eddltiona
<br /> soil - e_xcavat'i.;on:-in_ 7-the area of�ample-poi-ht . C2 , as oFfkr ed in
<br /> KEI Is revised work plan/proposal (KEI-P9�=02'02 .P1R) dated March 11,
<br /> 1991. Following the excavation of soil from the fuel tank pit to
<br /> the initial sample depths additional soil was removed from beneath
<br /> sample point location C2 't`o� 'depth of about 2'6 fe'et.:beldw' grade
<br /> and one soil sample, labeled C2 (26 , aJwso colXected from this
<br /> depth. In addition," ,oar s_o _ sample �lahej�e&Z-SW _N_, 5W-S,,, SW-E�,
<br /> .,
<br /> a'n S =W�, w re co ect'"`d f+' o t e sidewal,ls of the xcawation at
<br /> Cdt ` s df approximately _25x 5"`fee`"tbelow gade5ample point
<br /> locations are as indicated on the attached Site Plan, Figure 3 .
<br /> All samples were analyzed by Sequoia Analytical Laboratory in
<br /> Concord, California. All fuel tank pit and product pipe trench
<br /> soil samples were analyzed for benzene, toluene, xylenes, and
<br /> ethylbenzene (BTX&E) , total lead, and ethylene dibromide (EDB) .
<br /> All fuel tank pit and product pipe trench soil samples, except
<br /> samples Al and A2 (collected from beneath the diesel fuel tank) ,
<br /> were also analyzed to determine levels of total petroleum hydrocar-
<br /> bons (TPH) as gasoline. Product pipe trench samples P1 through P3,
<br /> and samples Al and A2 , were also analyzed for TPH as diesel.
<br /> Soil samples WO1 (collected from beneath the waste oil tank) and
<br /> P12 (collected from beneath the waste oil remote fill line) were
<br /> analyzed for BTX&E, EPA method 8010 constituents, total extractable
<br /> petroleum hydrocarbons (TEPH) , polychlorinated biphenyls (PCB's) , '
<br /> and the metals cadmium, chromium, lead, and zinc. Sample W01 was
<br /> also analyzed for TPH as gasoline.
<br /> Analytical results of the initial soil samples collected from the
<br /> fuel tank pit (samples Al, A2, Bl, B2 , Cl, and C2) indicated non-
<br /> detectable levels of TPH as gasoline or TPH as diesel (as a lic-
<br /> r' abler—f,or alLsamp.lesexceam le C-r , which showed PHS as
<br /> ,w.
<br /> as u e_ _'Aetected�at�3_,_9A,_;-P anc_.benzene` detected at_ 7 4 ppm.
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