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Page 19 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-15C MW-16A MW-16B MW-22A MW-23A <br /> Sample ID: WG-2480-MW-15C-170310 WG-2480-MW-16A-170310 WG-2480-MW-16B-170310 WG-2480-MW-22A-180310 WG-2480-MW-23A-170310 <br /> Sample Date. 3/17/2010 3/17/2010 3/17/2010 3/18/2010 3/17/2010 <br /> Parameters Units <br /> Volatile Organic Compounds(Cont'd.) <br /> Trifluorotrichloroethane(Freon 113) gg/L <0.50 <0.50 <0.50 <0.50 <0.50 <br /> Vinyl acetate gg/L <10 <10 <10 <10 <10 <br /> Vinyl chloride gg/L <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 <br /> Metals <br /> Iron mg/L - - - <0.20 - <br /> Iron(dissolved) mg/L <0.20 <br /> Manganese mg/L 0.16 <br /> Manganese(dissolved) mg/L - - - <0.020 - <br /> Petroleum Products <br /> Total Petroleum Hydrocarbons(C10-C28)DRO gg/L <52 <53 <53 280 <54 <br /> Petroleum Products-Silica Gel Cleanup <br /> Total Petroleum Hydrocarbons(C10-C28)DRO gg/L <52 <53 <53 <54 <54 <br /> Wet <br /> Alkalinity,bicarbonate mg/L - - - 350 - <br /> Alkalinity,carbonate mg/L <8.0 <br /> Alkalinity,hydroxide mg/L <8.0 <br /> Alkalinity,total(as CaCO3) mg/L 350 <br /> Ammonia mg/L <0.20 <br /> Biochemical oxygen demand(BOD) mg/L <2.0 <br /> Chemical oxygen demand(COD) mg/L <20 <br /> Chloride mg/L 190 <br /> Dissolved organic carbon(DOC) mg/L 3.1 <br /> Nitrate(as N) mg/L 10 <br /> Nitrite(as N) mg/L <0.30 <br /> Nitrite/Nitrate mg/L 10 <br /> CRA 058324Memo-39-Tt <br />