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<br /> fi. KLEINFELDER
<br /> September 22, 1988
<br /> File 24-2112-10 �,
<br /> sk� 26TO
<br /> Sonny Sl�ipwasl;
<br /> stw
<br /> c�vvQEar�nNti iastiN
<br /> Nomellini Cortstkuction
<br /> 939 West Charter Way
<br /> Stockton,CA 95206
<br /> SUBJECT. Soil Sample Analytical Results,Nomellini Construction
<br /> Dear Mr.Shipwash.
<br /> This is a report of the analytical_Z-esults for the soil s raFics collected ut 1045 West Charter
<br /> Way, Stockton, California (Elate 1). It is Kleinfelder s understanding that a 55G gallon
<br /> underground waste oil tank and two 1,000 gallon gasoline tanks, one regular and one
<br /> unleaded, were excavated and removed frons the site. AF.
<br /> er Foley of the San Joaquin County Local Health District, Nomellini Coni ru tiowith nlhad ojvo
<br /> soil samples collected from the bottom of the
<br /> eatank. excavation one from below the east s Jc of
<br /> ch
<br /> i On August 25, 1988,a Kleinfelder geologist collected three soil samples from native soil at
<br /> a#18514 depth of approximately I I feet from the two excavations (Plate 2). Sail samples #I8513,
<br /> Qualitative
<br /> and #1$scr were caliectcd from a brown moist, silty clay with traces of fine sand.
<br /> Qualitative field screening using a field flame photoionization detector resulted in readings
<br /> of 0 arcs per in""'on by volume (ppmv) for sample #18513 and over 1,000 ppmv for
<br /> samples#18514 and#18515.
<br /> The samples were delivered under chain-of-custody to Enseco-California Analytical
<br /> Laboratory in West Sacramento. T1Te results for samples #18513, #18514,and #18515 are
<br /> Presented on Table I. Laboratory data sheets with the laboratory's detection limits and a
<br /> chain-of-custody form are included at the end of this report.
<br /> Sample #18513, collected from below the waste oil tank, was analyzed for total petroleum
<br /> hydrocarbons (TPI-1) by CC/FID, halogenated volatile organics, by EPA Method 8010,
<br /> benzene, toluene, ethylbenzene and xylene (BTEX) by EPA Method 8020, and PCBs by
<br /> EPA Method 8080, Low BTEX concentration.; were detected in sample #18513, and t
<br /> results from the remaining analyses were below the fabhe
<br /> oetecte s detection limits.
<br /> Sam Ile #18514 collected below the regular gasoline tank was analyzed for TPH, BTEX,
<br /> 1,2-Dibrornoethane (EDB) by EPA Method $010, and organic lead. Laboratory Tl'H
<br /> concentrations were detected in sample #18514 of 1,000 mg/kg g;soJine anti 17 mg/kg
<br /> diesel. The benzene, toluene, ethylbenzene, and .�cylenc concentrations were 24, 230, $1,
<br /> and 470 ing kb, respectively. Both the analysis forl= and organic lead were below the
<br /> laboratory detection limits.
<br /> Sample #18515 was collected below the unleaded gas tank and analyzed for TPH and
<br /> tit, BTEX. Sample #18515 had lPH concentrations of 3,200 mg/kg gasoline and 70 rrg/k.
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