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. SECOND QUARTER,2002
<br /> GROUNDWATER MONITORING REPORT
<br /> JAMAR OIL DISTRIBUTION
<br /> AUGUST 2002
<br /> TPH D was detected in wells MW-1 through MW-4 this quarter at concentrations ranging from
<br /> 2,340µg/1 in the sample from MW-3,to 541 µg11 in the sample from MVV-2
<br /> Benzene was detected in samples from all wells at concentrations ranging from ranging from
<br /> 35,000µg/l, in the sample from MW-1,to 9.90µg/1 in the sample from MW-5 Toluene was
<br /> detected in samples collected from MW-1 through MW-5 at 1,900µg1l, 180µg11, 1,400µg11, 670
<br /> µg/1 and 3.3 µg/1, respectively Ethylbenzene was detected in the samples collected from MW-1,
<br /> MW-3, and MW-5 at 1,200µg11, 450µg/l, and 0 530µg/l,respectively Total xylenes were
<br /> detected in samples collected from MW-1 through MVV-5 at 2,600µg11, 110µg/1, 2,100µg11,
<br /> 2,200 jig/]and 2 90µg11,respectively.
<br /> MTBE was detected in samples from MW-1 through MW-5 at 210,000µg/l, 420µg/1, 55µg11,
<br /> 4,400µg/l,and 15µg/1,respectively Ternary butyl alcohol(TBA)was detected in the sample
<br /> collected from MW-1,MW-4, and MW-5 at 43,000µg11, 1,000µg/l,and 62µg11,respectively
<br /> 1,2-DCA,DIPE,ETBE,TAME, and EDB were non-detect in all samples taken this quarter
<br /> Groundwater analytical data are summarized in Table 2 and shown on Figure 5 Copies of the
<br /> laboratory reports with COC documentation are included in Appendix B
<br /> CONCLUSIONS
<br /> Generally,the petroleum hydrocarbon concentrations and MTBE have remained relatively
<br /> consistent over the last two years However,the extent of impacted groundwater remains
<br /> undefined at the site 1,2 DCA was not detected this quarter in the sample from MW-1 The
<br /> previous quarter detection of 1,2-DCA in MW-1 appears to be an anomalous event TBA
<br /> continued to be detected in samples from MW-5 and for the first time in MW-1
<br /> SCHEDULE
<br /> The next quarterly monitoring event is scheduled for September 2002. The Third Quarter
<br /> Monitoring Report will be submitted on October 31,2002.
<br /> GHH is currently awaiting preapproval from the UST Cleanup Fund prior to proceeding with
<br /> additional subsurface investigation work at the site.
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