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- - --, - --- — -------- - Groundwater-quality Monitoring Report: 7500 West Eleventh Street, Tracy, CA Well Date TPHd TPHg Benzene Toluene Ethyl- Total TBA MTBE TAME DIPE ETBE 1,2-DCA EDB Lead No. Sampled benzene Xylenes gg/L µg/L µg/l_ µg/L µ01L µ91L µg/L µg/L µg/L µg/L µg/L µg/L µg/L mg/L MW-5 5111100 ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/28/00 ND ND ND ND ND ND n/a ND n/a n/a n/a n/a n/a n/a 5/30101 ND ND ND ND ND ND ND ND ND ND ND nla nla n/a 9111/01 ND ND ND ND ND ND ND ND ND ND ND n/a n/a n/a MW-6 5111100 ND ND ND ND ND ND ND 150 ND ND ND ND ND ND 11/28/00 ND ND ND ND ND ND n/a 160 n/a n/a n/a n/a n/a nla 5130101 81 s ND ND ND ND ND ND 550 ND ND ND n/a n/a n/a 9111101 73 7 ND ND ND ND ND ND 310 ND ND ND n/a n/a n/a MW-7 5111100 1,300 1,4004 140 98 23 360 ND 22 ND ND ND ND ND ND 11/28/00 36,000 47,000 900 1,700 1,300 9,500 ND ND ND ND ND n/a n/a n/a 5130101 1,0007 2,800 130 230 120 640 ND ND ND ND ND n/a n/a n/a 9111/01 1,400,000" 86,000 1,600 6,900 4,200 25,000 ND ND ND ND ND n/a n/a n/a Notes: (1) Chromatogram Pattern: Unidentified Hydrocarbons 4C16 (2) Chromatogram Pattern: Unidentified Hydrocarbons >C16 (3) Chromatogram Pattern: Unidentified Hydrocarbons C9-C24 (4) Chromatogram Pattern: Gasoline C6-C12 (5) ND= Not Detected above the Method Detection Limit(MDL). (6) nla = not analyzed (7) Hydrocarbon reported does not match the pattern of the laboratory's Diesel standard. (8) Hydrocarbon reported does not match the pattern of the laboratory's gasoline standard. (9) Hydrocarbon reported is in the late Diesel range, and does not match the laboratory's Diesel standard (10)Sample contains discrete peak in addition to gasoline. (11) Floating Product in well. Page 2 of 2 Results of Anayses sic