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r rr �r rr rr rr rr rr � r r rr rr rr r r� � �r Project No ,, 0-06-62 August 22,1996 Page I of 3 TABLE I CUMULATIVE SUMMARY OF GROUNDWATER MONITORING DATA AND ANALYTICAL RESULTS CALTRANS STOCKTON YARD MAINTENANCE FACILITY STOCKTON,CALIFORNIA WELL ID DATE DEPTH TO TOC GROUNDWATER TPHg TPHd B T E X MTBE SAMPLED GROUNDWATER ELEVATION ELEVATION (ug/1) (ug/1) (ugll) (ug/1) (ug/1) (ug/l) (ug/l) BY (mg/1) (mg/1) MW-1 416/92 6596 2149 -4447 4,900 180* 1,100 360 <3 400 — AG MW-1 10/22/93 6792 2149 -4643 27,000 --- It 000 1,500 <50 1,400 --- EA MW-1 611194 6568 2149 -44 19 1,500 <50 13,700 418 145 206 --- N&M MW-1 316195 6501 2149 -43 52 2,200 280 150 75 13 71 --- Geocon MW-ldup 316195 6501 2149 -43 52 2,300 --- 150 80 13 71 --- Geocon MW-1 318195 6503 2149 -43 54 --- --- --- --- --- --- — Geocon MW-1 512195 64 18 2149 -4269 --- --- --- --- --- --- --- Geocon MW-1 515195 --- 2149 --- 2 900 <50 240 110 13 100 --- Geocon MW-ldup 515195 --- 2149 --- --- <50 --- --- --- --- --- Geocon MW-1 2/6196 6203 21 49 -4054 2200 <50 280 130 30 110 100 Geocon MW-1 4/11196 6123 2149 -3974 --- --- -- --- --- --- --- Geocon MW-1 4123196 6098 210 -3949 4200 680 1,100 300 123 300 25 Geocon MW-1 712/96 5992 2149 -3843 51,000 2,600 10,1()0 7,200 1,100 6,600 38 Geocon MW-2 4/6192 66 17 21 71 4446 3200 73* 450 12 <3 49 --- AG 11W-2 10/22/93 6111 2171 -4641 4,500 --- 1,000 93 25 170 EA MW-2 6/1194 6585 2171 -44 14 588 <50 337 151 <2 5 45 7 N&M MW-2 3/6195 6528 21 71 -43 57 1400 100 150 10 5 3 15 Geocon MW-2 3/8195 6521 2171 -43 50 --- --- --- --- --- --- --- Geocon MW-2 5/2195 6436 2171 -4265 --- --- -- --- --- --- --- Geocon MW-2 5/5195 --- 21 71 --- 600 <50 78 11 25 10 --- Geocon MW-2 2/6/96 6296 2171 -41 25 <50 <50 23 <0 3 <0 3 <0 3 <0 5 Geocon MW-2 4/11196 6142 2171 -3971 --- --- --- --- --- -- --- Geocon MW-2 4122196 6112 21 71 -3941 70 90 69 06 05 <0 5 08 Geocon MW-2 711/96 6005 21 71 -3834 50 100 3 5 <0 5 <0 5 <05 05 Geocon MW-3 416192 6598 2141 -4457 2,400 84* 260 98 <3 22 --- AG MW-3 10/22/93 6780 2141 -4639 4,700 --- 520 100 90 110 --- EA MW-3 611/94 6548 2141 -4407 1200 <50 238 411 <5 0 295 --- N&M MW-3 316/95 6501 2141 -4360 1 700 110 150 38 4 1 38 --- Geocon MW-3dup 316195 65 01 2141 -4360 1900 --- 140 37 40 37 Geocon MW-3 3/8195 6491 2141 -4350 --- --- --- --- --- --- --- Geocon MW-3 5/2195 6408 2141 -4267 --- --- --- --- --- --- --- Geocon MW-3 515195 --- 2141 -- 650 <50 400 60 29 90 --- Geocon MW-3 216196 6269 2141 4129 180 <50 20 25 <0 3 33 94 Geocon MW-3 4111/96 6136 2141 -3995 --- --- --- --- --- --- --- Geocon MW-3 4123196 6090 2141 -3949 400 200 77 28 12 28 1 6 Geocon MW 3dup 4/23/96 --- 2141 --- 400 250 93 32 14 36 15 Geocon MW-3 712196 5978 2141 -3837 15,000 470 2 700 1,900 530 2,000 36 Geocon MW-4 5/2/95 6420 2163 4257 130 <50 <0 5 06 <0 5 <0 5 --- Geocon MW-4 2!5/96 6281 2163 41 18 83 <50 <0 3 <0 3 <03 <03 13 Geocon I