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Page 23 of 24 <br /> TABLET <br /> ANALYTICAL RESULTS SUMMARY <br /> SEMI-ANNUAL GROUNDWATER SAMPLING <br /> MAINTENANCE FACILITY <br /> TRACY,CALIFORNIA <br /> MARCH 2010 <br /> Sample Location: MW-24A MW-25A MW-26A MW-27A MW-27A TW-03 <br /> Sample ID: WG-2480-MW-24A-170310 WG-2480-MW-25A-170310 WG-2480-MW-26A-180310 WG-2480-MW-27A-180310 WG-2480-DUP-3-180310 WG-2480-TW-03-180310 <br /> Sample Date. 3/17/2010 3/17/2010 3/18/2010 3/18/2010 3/18/2010 3/18/2010 <br /> Duplicate <br /> Parameters Units <br /> Volatile Organic Compounds(Cont'd.) <br /> Trifluorotrichloroethane(Freon 113) µg/L <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <br /> Vinyl acetate gg/L <10 <10 <10 <10 <10 <10 <br /> Vinyl chloride µg/L <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <br /> Xylene(total) gg/L <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <br /> Metals <br /> Iron mg/l, - - 4.9 - - <0.20 <br /> Iron(dissolved) mg/l, <0.20 <0.20 <br /> Manganese mg/l, 0.11 0.099 <br /> Manganese(dissolved) mg/l, - - <0.020 - - 0.085 <br /> Petroleum Products <br /> Total Petroleum Hydrocarbons(C10-C28)DRO µg/L <54 240 <54 110 87 2100 <br /> Petroleum Products-Silica Gel Cleanup <br /> Total Petroleum Hydrocarbons(C10-C28)DRO µg/L <54 <53 <54 <53 <55 <52 <br /> Wet <br /> Alkalinity,bicarbonate mg/l, - - 340 - - 510 <br /> Alkalinity,carbonate mg/l, <8.0 <8.0 <br /> Alkalinity,hydroxide mg/l, <8.0 <8.0 <br /> Alkalinity,total(as CaCO3) mg/l, 340 510 <br /> Ammonia mg/l, <0.20 <0.20 <br /> Biochemical oxygen demand(BOD) mg/l, 0.64) <2.0 <br /> Chemical oxygen demand(COD) mg/l, <20 34 <br /> Chloride mg/l, 260 140 <br /> Dissolved organic carbon(DOC) mg/l, 1.5 7.4 <br /> Nitrate(as N) mg/l, 12 0.65 <br /> Nitrite(as N) mg/l, <0.30 <0.30 <br /> Nitrite/Nitrate mg/l, 12 0.65 <br /> CRA 058324Memo-39-Tt <br />