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' Diamond Lumber Manteca Quarterly Groundwater Monitonng Page 6 TABLE 2: Analytical Groundwater Data fiES��dW4 4" C-MV6 SRK MVYI SIiR-Mw2 SR'-MW3 .2 p p (MW-I in B breetnber 3 19� ' Volatile Hydrocarbons NI NI Nt 3,600 2700 37,000 Benzene NI NI M 100 51 790 Toluene Ni NI NI 36 54 1000 ' Eth lbenzene M NI NI 23 —7-t'1, 7 430 xylenes NI I NI NI 89 72 1,400 Lead NI NI NI NS NS NS October 15,1991 Volatile Hvdrocarbons NI NI NI 1,500 59,000 4200 Benzene NI NI NI 86 9 400 550 Toluene NI NI NI 14 10000 <05 Eth lbenzene NI NI NI 79 1 200---L 180 XvIenes NI NI NI 140 7,3W 360 Lead NI NI NI 28 95 330 Nommber 24.1991 ' Volatile Hydrocarbons <50 <50 <50 NS NS NS Benzene <05 16 <05 NS NS NS 1 Toluene <05 <05 <05 NS NS NS Eth lbenzene <05 <05 <05 NS NS NS Xylenes <05 1 090 1 <OS NS NS NS Lead 1. .� �L�a� 1r ` 350 24 NS NS NS I� A ri16 1992 Volatile Hydrocarbons <50 1 800 <03 NS NS NS ' Benzene <05 220 <05 NS NS NS Toluene <OS <05 <0S NS NS NS Eth lbenzene <OS <03 <05 NS NS NS xylenes. <03 120 <05 NS NS NS ' Lead 26 -&9-71 NS NS NS AUgust 31,19n Volatile Hydrocarbons <20 100 <05 5ffl-MI)o of 3'P00 )Od ' Benzene <05 2 <O 5 -ti'M#00k --r48U 110 0 Toluene <05 <05 <05 -62" 7Z -940 6100 1340 330 Eth lbenzene <05 08 <05 x-644 .ti ;6680 eta A80j1 X lines <05 06 <OS 4040 X890"' lr-Z06" � Lead 48 100 14 24 75 310 TlebruaryS. 1993 ' Volatile Hydrocarbons <20 30 <20 2..800 40 000 1.500 Benzene 08 <03 10 1909 7,660 1607 Toluene 08 <03 12 66 3 025 13 ' Eth lbenzene 06 <03 09 I03 885 476 Xylenes 16 <03 20 6944 9,5A 393 Lead 3 36 3 12 41 46 NOTES. NI = No sample collected because monttonng well had not yet been installed NS = No sample collected All measurements in ppb ' w.n Steffen Robertson and Kirsten 3xsoa"%4 QrIr