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r r r r r r r ' r r rr r r ri ■� � r Project No 58100 06-62 November 27 1996 Page 3 of 4 TABLE 1 CUMULATIVE SUMMARY OF GROUNDWATER MONITORING DATA AND ANALY TICAL RESULTS CALTRANS STOCKTON YARD MAINTENANCE FACILITY STOCKTON,CALIFORNIA DEPTH TO TOC GROUNDWATER GROUNDWATER ELEVATION ELEVATION TPHg TPHd B T E X MTBE SAMPLED WELL ID DATE (feet) (MSL) (MSL) (µg/1) (Ag/1) (µgll) (µ811) Gµgll) (µg11) (µg11) BY VW-1 512195 6440 21 73 -4267 --- --- --- --- --- --- --- Geocon VW-1 616195 63 83 21 73 -42 10 28,000 600 5,300 2,500 300 2,000 -- Geocon VW-1 2/6196 6296 21 73 -4123 10,000 <50 1,700 1,300 860 960 <50 Geocon VW-1 4/11196 6142 2173 -3969 --- -- --- --- --- --- --- Geocon VW-1 4123/96 6112 21 73 -3939 16 000 <SO 720 1,500 580 1,700 98 Geocon O VW-I 7/2196 5998 21 73 38 25 13 000 650 3,500 260 470 1,300 37 Geocon d VW-1 10/23/96 6037 21 73 -3864 8,200 190 1 900 271 220 370 31 Geocon VW-2 216/96 63 17 2190 4127 16 000 <50 3,000 3,100 260 2000 <50 Geocon VW-2dup 216196 6317 2190 4127 24,000 <50 4,700 4,700 2 500 2,800 <100 Geocon VW-2 4/11196 6163 2190 -3973 --- -- --- --- --- --- --- Geocon VW-2 4123196 6137 2190 -3947 54,000 <50 8,100 5,600 290 6,500 60 Geocon 0 VW-2 7/2196 6019 2190 -3829 20,000 1 400 3,000 1 700 200 1 700 53 Geocon 0 VW-2dup 712196 6019 2190 -3829 20,000 1,400 3,500 2,000 200 1,900 58 Geocon $ VW 2 10/23/96 6055 2190 -3865 17 000 570 4,200 1,300 89 430 43** Geocon VW 2dup 10/23/96 --- 2190 --- 15 000 --- 3 600 1,100 74 360 36** Geocon MW-9 2/5196 61 15 2043 4072 <50 <50 <0 3 <0 3 <03 <0 3 <05 Geocon MW-9 4/11196 6025 2043 -3982 -- --- --- --- --- --- --- Geocon MW-9 4/22/96 59 99 2043 -3956 <50 <50 <0 5 <0 5 <0 <0 5 <0 5 Geocon MW-9dup 4/22/96 5999 2043 -3956 <50 --- <0 5 <0 5 <05 <05 <0 5 Geocon r d MW-9 711/96 5881 2043 -3838 <50 <50 <0 5 <0 5 <0 5 <0 5 <0 5 Geocon _ ro MW 9 10/22/96 5918 2043 -3875 <50 <50 <0 5 <0 5 <0 5 <0 5 <0 5 Geocon MW-10 215/96 6250 2144 4106 <50 <50 <0 3 <0 3 <03 <0 3 <0 5 Geocon MW-10 4/11/96 61 10 21 44 -3966 --- --- --- --- --- --- --- Geocon MW-10 4122196 NM 2144 NM --- --- --- --- Geocon MW-10 711196 NM 2144 NM --- --- --- --- --- --- Geocon 0 MW-10 10/22/96 6018 2144 -3874 <50 68 10 09 <0 5 05 <05 Geocon G MW-10dup 10/22/96 --- 2144 --- <50 --- 10 09 <0 5 <0 5 <0 5 Geocon MW-11 215196 6235 21 13 -41 22 500 <50 35 23 <0 3 <0 3 170 Geocon MW-I l 4111/96 6096 21 13 -3983 -- --- --- -- --- --- --- Geocon MW-11 4122/96 6071 21 13 -3958 <50 <50 07 <0 5 <0 5 <0 5 1 0 Geocon 0 MW-II 7/1196 5958 21 13 -3845 600 120 5 1 42 <0 5 10 14 Geocon v MW 11 10/22/96 5990 21 13 -3877 800 170 48 36 <0 5 <0 5 16 Geocon MW-11 10/22/96 --- 21 13 -- 800 160 49 37 <0 5 <0 5 16 Geocon MW-12 215196 63 50 22 19 -4131 <50 <50 <0 3 <0 3 <0 3 <0 3 <0 5 Geocon MW-12 4111196 61 89 22 19 3970 -- -- --- --- --- --- --- Geocon MW-12 4122/96 6162 22 19 3943 <50 100 <0 5 <0 5 <0 5 <05 <0 5 Geocon a MW-12 7/1/96 6051 22 19 -3832 <50 140 <0 5 <0 5 <0 5 <0 5 <0 5 Geocon p MW-12 10/22/96 6089 22 19 -38 70 <50 53 <0 5 <0 5 <0 5 <05 <0 5 Geocon