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1 Petroleum hydrocarbons or BTEX compounds were detected to the samples collected from MW-9 the holding <br /> tank, nor the equipment blank <br /> Table 3-2 <br /> Organic Analytical Results <br /> San Joaquin County Human Services Agency <br /> June 2002 <br /> Well Groundwater Benzene Toluene Ethylbenzene Total TPH-G <br />' Elevation (gg/L) (ug/L) (ug/L) Xylene <br /> (feet) (,-,g/,) <br />' MW-2 NM 10,000 18 740 1,100 10,000 <br /> MW-2-DUP NM 9,900 24 940 1,300 12,000 <br /> MW-2A -1678 13 ND (050) ND(o so) ND (o so) 570 <br /> MW-3A -1681 ND (o sod ND(o sod ND(0.50) ND(050) 120 <br /> rMW-4 -1614 ND to sod ND(050) ND (o sod ND(050) ND (so) <br /> MW-5 -1467 NS NS NS NS NS <br /> MW-6 -1537 051 ND (o sod ND(050) ND (o sod ND (50) <br /> 1 MW-7 -1709 ND(050) ND(o 50) ND(0 50) ND(o sod ND(so) <br /> MW-8 -1694 NS NS NS NS NS <br />' MW-9 -1674 ND(0 50) ND(o sod ND(o so) ND (o so) ND (so) <br /> an NA NA ND ca sod ND (050) ND(050) ND (o sod ND (50) <br />' E13-1 NA ND(0 sod ND (o sod ND(o 50) ND(o sod ND(so) <br /> Notes NA Non applicable <br />' ND (0 5) Analyte not detected, detection limit indicated in parentheses <br /> NM Not measured <br /> NS Not sampled during this quarter <br />' (ug/L) Micrograms per liter <br />' 4.0 CONCLUSIONS <br /> Concentrations oftotal petroleum hydrocarbons continue to decrease in source area wells MW-2,and MW- <br /> 2A but remained stable in MW-3A The decreasing concentrations are most likely due to natural degradation <br /> • processes Benzene concentrations decreased in MW-2A, and remained stable in MW-2 Ethylbenzene <br />' concentrations decreased in MW-2 Low concentrations of toluene were detected in MW-2 Total xylenes <br /> LSPA01ECT55SAN]0QIHSAUQ02APT WPD 5 <br />