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TABLE 6 <br /> MAROS Results for Individual Wells <br /> Rough and Ready Island <br /> Stockton,Califomia <br /> Linear Median Mean <br /> Number of Number of All Samples Mann Kendall Regression Concentration Concentration <br /> Constituent Well Samples Detects Non Detect Trend Trend (ug/L) (ug/L) <br /> ETRACHLOROETHYLENE(PCE) EW-2 1 0 Yes N/A N/A 60 60 <br /> RICHLOROETHYLENE(TCE) EW-2 1 0 Yes N/A N/A 60 60 <br /> VINYL CHLORIDE EW-2 1 1 No N/A N/A 1600 1600 <br /> TOTAL 1,2-DICHLOROETHYLENE EW-2 1 1 No N/A N/A 9400 9400 <br /> BENZENE EW-5 8 0 Yes NO NO aos 0.094 <br /> ETRACHLOROETHYLENE(PCE) EW-5 8 0 Yes NO NO 0.075 0.097 <br /> RICHLOROETHYLENE(TCE) EW-5 8 0 Yes ND NO 0.05 0.084 <br /> VINYL CHLORIDE EW-5 8 1 No PD D 0.05 0.28 <br /> TOTAL 1,2-DICHLOROETHYLENE EW-5 6 7 No NT D 1.8 6.4 <br /> BENZENE P-110B 1 0 Yes N/A WA 1 1 <br /> ETRACHLOROETHYLENE(PCE) P-11013 1 0 Yes N/A WA 1 1 <br /> RICHLOROETHYLENE(TCE) P-110B 1 0 Yes N/A N/A 1 1 <br /> VINYL CHLORIDE P-1108 1 0 Yes N/A WA 1 1 <br /> TOTAL 1,2-DICHLOROETHYLENE P-110B 1 0 Yes N/A N/A 1 1 <br /> BENZENE P-138 1 0 Yes N/A N/A 0,026 0.026 <br /> ETRACHLOROETHYLENE(PCE) P-138 1 0 Yes N/A N/A 0.041 0.041 <br /> RICHLOROETHYLENE(TCE) P-138 1 0 Yes N/A WA 0.03 0.03 <br /> VINYL CHLORIDE P-138 1 0 Yes N/A N/A 0.035 0.035 <br /> TOTAL 1,2-DICHLOROETHYLENE P-138 1 0 Yes N/A N/A 0.25 0.25 <br /> BENZENE P-175 1 0 Yes N/A N/A 0.25 0.25 <br /> ETRACHLOROETHYLENE(PCE) P-175 1 0 Yes N/A N/A 1 1 <br /> RICHLOROETHYLENE(TCE) P-175 1 0 Yes N/A N/A 1 1 <br /> VINYL CHLORIDE P-175 1 0 Yes N/A WA 1 1 <br /> TOTAL 1,2-DICHLOROETHYLENE P-175 1 1 No N/A N/A 0.2 0.2 <br /> BENZENE P-176 1 0 Yes N/A WA 0.25 0.25 <br /> ETRACHLOROETHYLENE(PCE) P-176 1 0 Yes N/A N/A 1 1 <br /> RICHLOROETHYLENE(TCE) P-176 1 0 Yes WA N/A 1 1 <br /> VINYL CHLORIDE P-176 1 0 Yes N/A N/A 1 1 <br /> TOTAL 1,2-DICHLOROETHYLENE P-176 1 0 Yes N/A N/A 1 1 <br /> BENZENE P-178 1 0 Yes N/A N/A 0.026 0.026 <br /> ETRACHLOROETHYLENE(PCE) P-178 1 0 Yes N/A N/A O.D41 0.041 <br /> RICHLOROETHYLENE(TCE) P-178 1 0 Yes N/A N/A 0.03 0.03 <br /> VINYL CHLORIDE P-178 1 1 No N/A N/A 1A 1.4 <br /> TOTAL 1,2-DICHLOROETHYLENE P-178 1 0 Yes N/A N/A 0.25 0.25 <br /> BENZENE wool 7 1 2 No PD D 5 3.3 <br /> ETRACHLOROETHYLENE(PCE) W-001 7 0 Yes ND NO 5 3.8 <br /> RICHLOROETHYLENE(TCE) W-001 7 0 Yes NO NO 5 3.8 <br /> VINYL CHLORIDE W1001 7 7 No D O 54 340 <br /> TOTAL 1,2-DICHLOROETHYLENE wool 7 6 No PO 0 16 210 <br /> BENZENE W-002 29 0 Yes NO ND 0.5 1.6 <br /> ETRACHLOROETHYLENE(PCE) W-002 29 0 Yes ND NO 1 1.7 <br /> RICHLOROETHYLENE(TCE) W-002 29 0 Yes NO ND 1 1.7 <br /> VINYL CHLORIDE W-002 29 20 No NT 1 3.9 30 <br /> TOTAL 1,2-DICHLOROETHYLENE W-002 29 19 No I I 5 150 <br /> BENZENE W-003 7 0 Yes ND ND 5 76 <br /> ETRACHLOROETHYLENE(PCE) NA003 7 7 No NT NT 61 1100 <br /> RICHLOROETHYLENE(TCE) W003 7 7 No NT NT 42 660 <br /> VINYL CHLORIDE W-003 7 6 No NT NT 23 92 <br /> TOTAL 1,2-DICHLOROETHYLENE W-003 7 7 No NT NT 390 2400 <br /> BENZENE W-004 20 0 Yes NO NO 0.05 1.1 <br /> ETRACHLOROETHYLENE(PCE) W-004 20 0 Yes NO NO 0.075 1.2 <br /> RICHLOROETHYLENE(rCE) W-004 20 0 Yes ND NO 0.075 1.2 <br /> VINYL CHLORIDE W-004 20 4 No D 0 0.51 104 <br /> TOTAL 1,2-0ICHLOROETHYLENE W-004 21 16 No s 1 Z9 3 <br /> BENZENE W-005 7 1 0 Yes NO NO 5 3.8 <br /> ETRACHLOROETHYLENE(PCE) W-005 7 0 Yes NO NO 5 3.8 <br /> RICHLOROETHYLENE(TCE) W-005 7 0 Yes NO NO 5 3.8 <br /> VINYL CHLORIDE W-005 7 1 No s 0 5 3.9 <br /> TOTAL 1,2-DICHLOROETHYLENE M005 7 5 No NT D 4 5.6 <br /> BENZENE W-006 6 D Yes NO NO 5 3.6 <br /> ETRACHLOROETHYLENE(PCE) W-006 6 0 Yes NO NO 5 3.6 <br /> RICHLOROETHYLENE(TCE) W006 6 1 No s 6 3 2.9 <br /> VINYL CHLORIDE W-006 6 0 Ves NO NO 5 3.6 <br /> 3 <br />