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Diamond Manteca,CA lune 1993 Groundwater Monitoring Page 7 <br /> ' TABLE 2 Analytical Groundwater Data f <br /> S1tri1#'4�1 581 •11iVI'2K-hiE- SVd BIi�MWS � �M�Sr6 <br /> i�ecemb$r t3 t989 <br /> Volatile Hydrocarbons NI NI NI 3 600 2,700 37,000 <br /> Benzene NI NI NI 100 5! 790 <br /> ' Toluene NI NI NI 36 54 1000 <br /> Eth lbenzene NI NI NI 23 1 7 430 <br /> Xylenes NI NI NI 89 72 1,400 <br /> Lead NI Ni NI NS NS NS <br /> October 1s 199t <br /> Volatile Hvdrocarbons NI NI NI 1 500 59,000 4 200 <br /> ' Benzene NI Ni NI 86 9,400 550 <br /> Toluene NI Ni NI 14 10,000 <0 5 <br /> Eth lbenzene NI NI NI 79 1,200 180 <br /> Xvlenes NI NI NI 140 7,300 1 360 <br /> ' Lead NI NI NI 2 8 4 5 330 <br /> Xnvt mhtr fid,i)9; <br /> Volatile Hydrocarbons <50 <50 <50 NS NS NS <br /> ' Benzene <0 5 1 6 <0 5 NS NS NS <br /> Toluene <0 5 <05 <05 NS NS NS <br /> Eth lbenzene <0 5 <05 <0 5 NS NS NS <br /> Xylenes <0 5 0 90 <0 5 NS NS NS <br /> Lead 18 350 24 NS NS NS <br /> A 111 fr 1992 <br /> Volatile Hvdrocarbons <50 1,800 <0 5 NS NS NS <br /> Benzene <0 5 220 <0 5 NS NS NS <br /> Toluene <0 5 <05 <0 5 NS NS NS <br /> Eth lbenzene <0 5 <05 <0 5 NS NS NS <br /> ' <br /> Xylenes <0 5 120 <0 5 NS NS NS <br /> Lead 26 57 27 NS NS NS <br /> t1ugust3f. 1491 <br /> Volatile Hydrocarbons <20 100 <20 3,100 39,000 6200 <br /> Benzene <0 5 2 <0 5 360 10,000 E 100 <br /> Toluene <0 5 <05 <05 68 6 100 380 <br /> Eth lbenzene <0 5 08 <05 62 940 340 <br /> ' <br /> Xylenes <0 5 06 <05 640 7,000 980 <br /> Lead 48 100 14 1 24 75 310 <br /> ebroory S 1993 <br /> ' Volatile Hydrocarbons <20 30 <20 2,800 40,000 1 500 <br /> Benzene 0 8 <03 10 1909 7,660 1607 <br /> Toluene 08 <03 12 66 3,025 1 3 <br /> Eth lbenzene 06 <0 3 0 9 103 885 476 <br /> Xylenes 1 6 <03 2 0 6944 9,500 393 <br /> Lead 3 36 3 1 12 1 41 46 <br /> Juxta 1943 <br /> Volat.le I1 drocarbons <20 3 i 0 290 1,100t) 3 500 160 <br /> Benzene <0 5 39 40 1,800 8,600 <0 5 <br /> Toluene <0 5 1 5 1 5 6 2 4,700 1 3 <br /> Eth lbenzene <0 5 2 8 2 8 520 800 <0 5 <br /> Xylenes <0 5 22 22 2.200 7,100 5 9 <br /> Lead 28 30 18 8 5 <1 <br /> MOTES <br /> NI= No sample collected because monitoring well had not yet been installed <br /> NS= No sample collected <br /> All measurements in ppb <br /> 12504=213-Qi.ty M. Sieffen Robertson and Kirsten <br />