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Project No 58100-06-11A <br /> March 15, 1995 <br /> TABLE I <br /> CUMULATIVE SUMMARY OF GROUNDWATER MONITORING DATA AND ANALYTICAL RESULTS <br /> CALTRANS STOCKTON YARD MAINTENANCE FACILITY <br /> STOCKTON, CALIFORNIA <br /> WELL DATE DEPTH TO TOC GROUNDWATER TPHg TPHd B T E x SAMPLED <br /> ID GROUNDWATER ELEVATION (ug/L) (ug/1) (ug/1) (ug/1) (ug/L) (ug/0 BY <br /> MW-1 04/06/92 65 96 21 49 -44 47 4,900 180* 1,100 360 <3 400 AG . <br /> 10/22/93 67 92 21 49 -46 43 2,700 --- 11,000 1,500 <0 5 1,400 EA <br /> 03/06/95 65 01 21 49 -43 52 2,200 <500 150 75 13 71 Geocon <br /> 03/08/95 65 03 21 49 -43 54 --- --- --- --- --- --- Geocon <br /> MW-2 04/06/92 66 17 21 71 -44 46 3,200 73* 450 12 <3 49 AG <br /> 10/22/93 68 12 21 71 -46 41 4,500 --- 1,000 93 25 170 EA <br /> 03/06/95 65 28 21 71 -43 57 1,400 <50D 150 10 5 3 15 Geocon <br /> 03/08/95 65 21 21 71 -43 50 --- --- --- --- --- --- Geocon <br /> MW-3 04/06/92 65 98 21 41 -44 57 2,400 84* 260 9 8 <3 22 AG <br /> 10/22/93 67 80 21 41 -46 39 4,700 --- 520 100 9 0 110 EA <br /> 03/06/95 65 01 21 41 -43 60 1,700 <500 150 38 4 1 38 Geocon <br /> 03/08/95 64 91 21 41 -43 50 --- -- --- --- --- --- Geocon <br /> notes ug/1 = micrograms per titer <br /> TOC = top of casing <br /> TPHg = total petroleum hydrocarbon as gasoline <br /> TPHd = total petroleum hydrocarbon as diesel <br /> BTEX = benzene, toluene, ethylbenzene and total xylenes <br /> --- = not tested <br /> depth to groundwater measured in feet from top of well casing <br /> groundwater elevations for 04/06/92 were recalculated using the Caltrans survey performed on 10/27/93 <br /> * = laboratory report notation "the above samples do not appear to contain diesel" <br /> AG = Alton Geosciences <br /> EA = Environmental Assessors, Inc <br /> I <br />