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Project No=WOO=00-06 62 November 27 1996 Page l of 4 TABLE 1 CUMULATIVE SUMMARY OF GROUNDWAl ER MONITORING DATA AND ANALYTICAL RESULTS CALTRANS STOCKTON YARD MAINTENANCE FACILITY STOCKTON,CALIFORNIA DEPTH TO fOC GROUNDWATER GROUNDWATER ELEVATION ELEVATION TPHg TPHd B T E X MTBE SAMPLED WELL ID DATE (feet) (MSL) (MSL) (µg11) (µg11) (µg/1) 41g/1) (µg/1) (µg/1) {4g11) BY MW-I 416192 6596 2149 -4447 4,900 180* 1 100 360 <3 400 AG MW-1 10/22/93 6792 2149 4643 27,000 --- 11,000 1,500 <50 1,400 EA MW-1 611/94 6568 2149 4419 1,500 <50 13 700 418 145 206 --- N&M MW-1 3/6/95 6501 2149 -43 52 2,200 280 150 75 13 71 --- Geocon MW-]dup 316195 6501 21 49 -4352 2 300 --- 150 80 13 71 Geocon 3/8/95 6503 2149 -4354 --- --- --_ --- Geocon MW-1 5/2/95 64 18 2149 -4269 --- --- --- Geocon Mw-1 5!5195 21 49 --- 2,900 <50 240 110 13 100 Geocon W-1 up 5/5/95 --- 2149 --- --- <50 - Geocon MW-1 216/96 6203 21 49 -40 54 2,200 <50 280 130 30 110 100 Geocon MW-1 4/11196 6123 21 49 -3974 --- --- --- --- --- --- --- Geocon MW-1 4/23196 6098 2149 -3949 4,200 680 1,100 300 123 300 25 Geocon MW-1 7/2196 5992 21 49 -3843 51,000 2 600 10,100 7,200 1,100 6 600 38 Geocon r p MW-I 10/23/96 60 16 2149 -3867 1 700 87 440 37 49 70 32 Geocon MW-2 4/6/92 66 17 21 71 -4446 3,200 73* 450 12 <3 49AG MW-2 10/22/93 68 12 21 71 -46 41 4,500 --- 1 000 93 25 170 --- EA MW-2 6/1/94 6585 21 71 -4414 588 <50 337 151 <2 5 457 N&M MW-2 3/6/95 6528 21 71 -4357 1,400 too 150 10 53 15Geocon MW-2 3/8/95 6521 21 71 -4350 --- --- --- --- --- - Geocon MW-2 5/2195 6436 21 71 -4265 --- -_ --- - Geocon MW-2 5/5195 --- 21 71 --- 600 <50 78 11 25 10 --- Geocon MW-2 216196 6296 21 71 -41 25 <50 <50 23 <0 3 <0 3 <0 3 <0 5 Geocon MW-2 4/11/96 6142 2171 -3971 --- --- --- --- --- Geocon MW-2 4122/96 61 12 21 71 -3941 70 90 69 06 0 5 <0 5 09 Geocon MW-2 711196 6005 21 71 -3834 50 100 3 5 <0 5 <0 5 <0 5 05 Geocon R n MW-2 10/22/96 6039 21 71 -3868 400 200 86 <0 5 <0 5 08 80 Geocon MW-3 416192 6599 2141 -4457 2,400 84* 260 98 <3 22 AG MW-3 10/22/93 6780 2141 -4639 4 700 --- 520 100 90 Ito --- EA MW 3 611/94 6548 21 41 -4407 1,200 <50 238 411 <5 0 295 N&M MW-3 316195 6501 21 41 4360 1,700 110 150 38 4 1 38 Geocon MW-3dup 3/6/95 6501 2141 -4360 1900 --- 140 37 40 37 Geocon MW-3 3/8195 6491 2141 -4350 --- --- --- --- Geocon MW-3 512195 6408 2141 -4267 --- --- --- --- --- Geocon MW 3 515195 --- 2141 --- 650 <50 400 60 29 90 Geocon MW-3 216/96 6269 21 41 4128 180 <50 20 25 <0 3 3 3 94 Geocon MW-3 4/11/96 6136 2141 -3995 --- Geocon MW-3 4123196 6090 2141 -3949 400 200 77 28 12 28 1 6 Geocon MW-3dup 4123/96 --- 2141 -- 400 250 93 32 14 36 15 Geocon MW-3 7/2196 5978 21 41 -3837 15,000 470 2 700 1900 530 2,000 36 Geocon MW-3 10/22/96 6002 2141 -3861 1,900 160 370 130 69 200 13 Geocon