ARCHIVED REPORTS XR0000249 - Laserfiche WebLink

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California Department of Transportation November 24, 1999 P P Stockton Maintenance Station, Stockton, California Project No 103872-02 i In well MW-3, total xylene concentrations decreased from 2 9 ug/l to non detect levels In well MW-4 there has been a decrease in total xylenes, from 11 8 ug/l to non detect levels In well MW-5, TPH-G concentrations decreased from 112gg/l to non detect levels and total xy- lene concentrations decreased from 46 6 µg/1 to 22 [tg/l Benzene increased in concentration from non-detect levels to 29 µg/l and ethylbenzene increased from non detect to 9 4 µg/1 TPH-G concentrations decreased in well MW-6 from 680 µg/1 to 290 µg/l Total xylenes de- creased to well MW-6 from 36 0 µg/1 to non detect levels Concentrations of TPH-G decreased in well MW-7 from 2,000 ug/1 to non detect levels and con- centrations of total xylenes decreased from 125 ug/1 to non detect levels In well MW-8 concentrations of total xylenes decreased from 19 0 ug/1 to non detect levels • In well MW-9 concentrations of TPH-G have decreased from 200 ug/1 to non-detect levels Con- centrations of total xylenes decreased from 49 7 ug/1 to non detect levels In well MW-10, total xylene concentrations decreased from to 6 3 ug/1 to non detect levels In well MW-11, total xylene concentrations decreased from 116 ug/1 to non detect levels In well VW-1 concentrations of TPH-G decreased from 550 µg/1 to 420 µg/l and benzene de- creased from 8 ug/1 to non detect levels In well VW-2 concentrations of TPH-G decreased from 5,700 µg/1 to 4,300 µg/1 and TPH-D in- creased from non detect levels to 300 µg/1 Benzene increased from 865 µg/1 to 1,270 µg/l, toluene increased from 57 µg/1 to 98 µg/l, ethylbenzene increased from non detect levels to 399 I µg/1, and total xylenes increased from 302 µg/1 to 869 ggll MTBE concentrations decreased from 76 gg/l to 32 µg/1 A duplicate sample, identified as VW-22, was taken at VW-2 The concentration levels of the constituents in the primary sample were within range of the duplicate sample Laboratory results aca 5