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HydroScience Engineers,Inc. Page 4 of 4 <br /> Table 'I - Water Quality Monitoring Results <br /> Northern California Power Agency, Roseville, Placer County <br /> Samples collected July 20, August 2, 3, 10, September 26, and November 16 2006 <br /> WATER QUALITY PARAMETER ANALYTICAL METHOD RESULTS OF ANALYSIS QA I QC <br /> Practical <br /> GTR# Constituent CAS# Analytical method used Results of Anaiysis Quantation Limit <br /> Influent Effluent Units Influent Effluent Influent Effluent <br /> 1,3,5-Trimethylbenzene 50308/8260B ug/L ND 1 <br /> ,1,4-Dioxane 5030B18260B ug1L NO 200 <br /> 2,2-Dichloropropane 5030B18260B ug1L NO 1 <br /> 2-Butanone(MEK) EPA624 503081826013 ug1L ND NO 5 10 <br /> 2-Chlorotoulene 503OB18260B ug1L ND 1 <br /> 4-Chlorotoulene 5030B18260B ug1L NO 1 <br /> '2-Hexanone EPA624 50306182648 ug/L ND NO 5 10 <br /> 4-Methyl-2-petanone (MIBK) EPA624 5030B/8260B ug1L NO NO 5 10 <br /> Meth yl-tert-butyl ether(MTBE) 1634044 EPA624 503013182606 ug/L ND ND 0.5 2 <br /> Trichlorofluoromethane '75694 EPA624 50308182608 ug/L NO NO 1 1 <br /> 1,1,2-Trichloro-1,2,2-Trifluoroethane 76131 50368182608 ug/L NO 1 <br /> Acetone EPA624 503OB18260B ug/L 40 10 20 10 <br /> Bromobenzene 503OB18260B ug/L NO 1 <br /> Bromochloromethane 5030B/8260B ug/L ND 1 <br /> Carbon disulfide EPA624 50308182606 ug1L 7 NO 5 1 <br /> Dibromomethane 5030B18260B u 1L NO 1 <br /> ;dichlorodifluoromethane 5030B18260B ug/L ND 1 <br /> Di-isopropyl ether(RIPE) 5030B18260B ug1L ND 2 <br /> Ethyl tert-butyl ether(ETRE) 5030B18260B ug1L ND 2 <br /> tert-Butanol 7565.0 5030B18260B uglL ND 20 <br /> Isopropylbenzene 5030B18260B ug1L NO 1 <br /> n-Butylbenzene 50308182608 ug1L.. NO 1 <br /> sec-Butylbenzene 5030B/8260B ug1L ND 1 <br /> tert-Butylbenzene 503013182606 ugIL ND 1 <br /> n-Propylbenzene 503013182608 ug/L NO 1 <br /> p-Isopropyltoluene 5030B/8260B ug1L ND 1 <br /> Pyridine EPA3520C1625; ug/L ND 10 <br /> tent-Amyl methyl ether(TAME) 503013182608 ug1L ND 2 <br /> Vinyl acetate EPA624 5030B18260B ug1L ND ND 20 1D <br /> Styrene 100425 EPA624 5030131826013 ug/L ND NO 0.5 1 <br /> xylenes 1330207 EPA624 503013182606 u It ND NO 0.5 1 <br /> Notes <br /> a PQL is greater than that recommended by Regional Board Five, December 2001 revised 13267 List <br /> b MFL-millions of fibers per liter <br /> c PQL adjusted up for dilution <br /> NCPA Water Quality Characterization January 2007 <br />