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Table 2 <br /> Groundwater Analytical Results <br /> Tosco (Unocal) Service Station ##5421 <br /> 7303 Pacific Avenue <br /> Stockton, California <br /> 1,2•Dichloro- Chloro- <br /> Well ID <br /> hloro- <br /> WellID Date TPH(D) benzene benzene TOG <br /> < b > (Ppm) <br /> MW-1 10/26/90 170 7 4 2 3 ND <br /> 03/26/91 ND 56 1 4 ND <br /> 06/26/91 290 5 8 ND ND <br /> 09/27/91 ND 6 3 ND ND <br /> 12/30/91 ND 14 28 ND <br /> 06/22/92 1803 65 ND -- <br /> 12/30/92' 1903 8 4 2 9 -- <br /> 06/21/932 2203 6 0 0 88 -- <br /> 12/20/93 ND 3 3 1 1 -- <br /> 06/07/94 1704 20 ND -- <br /> 12/02/94 2003 2 4 ND -- <br /> 06/07/95 1101 ND ND <br /> 12/01/95 3203 ND ND <br /> 12/09/965 190, ND ND 12/10/97 6 2803 ND ND <br />• EXPLANATIQNS. <br /> Giouridwatet analytical results were provided by MPDS Services, Inc <br /> TPH(D) = Total Petroleum Hydrocarbons as Diesel ND = Not Detected <br /> TOG = Total Oil and Grease -- = Not Analyzed <br /> ppb = Pat is per billion <br /> ppm = Parts per million <br /> All EPA Method 8270 constituents were ND, except for 1,2-dichlorobenzene at a concentration of 4 2 ppb In addition <br /> the following compound was tentatively identified by EPA method 8270 "open scan" analysis <br /> 1 1 -1(1-methyl-1 2-ethanediyl)bts(oxy)]-bis-2-propanol at a concentration of 660 ppb <br /> - All EPA Method 8270 constituents were ND, except for 1,2-dichlorobenzene at a concentration of 3 7 ppb <br /> ' Lahordtoty report indicates that the hydrocarbons detected did not appear to be diesel <br /> ' Laboi atoty i eport indicates that the hydrocarbons detected appeared to be a diesel and non-diesel mixture <br /> 5 All EPA Method 8010 constituents were ND, except for chloroform which was detected at a concentration of 0 67 ppb <br /> All EPA Method 8010 constituents were ND, except for chloroform which was detected at a concentration of 0 51 ppb <br /> Note All EPA Method 8010 constituents were ND, except as noted above <br /> 5421 xls/11180139 1 As of 06/22/98 <br />