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E3ased oil the resrslrs Of, Ilic t ieoprobc Investigation. Condor ruconuncn(led that monitor well, he installed at the
<br /> site in investigate and monitor the lateral extent of the: 1,1SO1inc ,rnd diesel contamination plume (reference - .Soil
<br /> wt,/ (I'l-mincill-w r Itnr.eti utiutt Rcport. prepared by Condor. (1,1112(1 September 30. 1996). tilr. Ronald Rowve of
<br /> tltc E'E IS:I !{D approved the proposal for the monitor Nell installation in correspondence to Condor, dated
<br /> Fchruary 6. 1997_ Condor subsc(luently prepared the Work Plan kir Monitor Weil Installation, dated N 30,
<br /> 1997. As described in Section I.Q Of this report, the % ork Plan was approved by the PI ISAJ ID and the
<br /> Reclamation District in Jul,- 199".
<br /> IIn accordance with the \\ork plan. Condor Conducted an additional soil and ground%vater investigation on
<br /> September 11), 15. ,inti 15, 1997, at the site. installed, developed, surveved, and
<br />' sampled as part ol, the inNestigation. The Rcl7ort - . cNitional ,Sieh carr! Ormaniw(rtcr jnve.s'tiQcrtion, dated
<br /> December 1 I. 1997, was prepared h\ Condor describing tile 'In\estigation results.
<br /> I
<br /> Laborator\ analysis of the soil samples indicated that total petroleum hydrocarbons quantified as kerosene.
<br />' diesel. and nlOtff oll ( I1_Plil, ethanol. tcrti,irN hutanol. DIPE_. 1: 1131= and I I,\\lI:) %\ere not detected at or above
<br /> the laborator,, reported cletrction limits 1r1 .rrly of the samples collected frons the monitoring wells during the
<br /> September. 1997, sampling cvcrrt. 13 I'I:\. 'F[11 1-(-, and of ]BI: %+ere nut detected at or above the laboratory
<br /> reported detection limits in Ille soil sample collected Iran \M I at a depth n1 six feet h-s. 13enr.ene. c:tlly!
<br />' benzene and xylene \%ere not detected at or above the Iaborator\ reported detection 111-nits in the soil sample
<br /> collected from MW-2 at a depth of four feet bgs. Toluene. TPHA; and XITBE \%ere detected in the soil sample
<br />' collected From NNW-2 at a depth of tour feet bgs (16 µg, kg, L2 and 1.3o0 }ig/kfg, respectively). Benzene
<br /> and toluene were not detected at or above the raised laboratory reported detection limit in the soil sample
<br />' collected from N,1W4 at a depth of Six feet bgs. NITBE was not detected at or above the laboratory reported
<br /> detection limit in the sample collected from INIM4 at a depth of six feet. Ethvl benzene, xylene and TPH-G were
<br />' detected in the sail sample collected from l\1W-4 at a depth of ,ix feet (680 }Lg/kg, 6.000 µ/kg, and 28 nlg/kg,
<br /> respectively). Laboratory results oftllc soil samples are presented in Table 11.5, on the next page.
<br /> Laboratory analysis of the ground%�atcr samples indi(ated total petroleum hydrocarbons quantified as kerosene,
<br /> diesel, and motor oil (TEP!!), ethanol, D1PE and ETBE .vere not detected at or above the laboratory reported
<br /> detection limits in any of the groundwater samples collected from the monitoring wells during the September,
<br />' 1997, trampling event. BTEX, the selected gasoline oxygenates/additives and TPE E-G were not detected at or
<br /> above the laboratory reported detection limits in (lie ground\Nater sample collected from NMI. Toluene, ethyl
<br /> henzenc. and TP1l-(j \\ere not detected at or above the Iahoratory reported detection limits in the groundwater
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