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ItIJV1s <br /> PHILIP ENVIRONMENTAL <br /> 08/18/02 FRI 06-46 FAX 161828151, <br /> - —: Table 4 <br /> ' <br /> d BTEX Analytical Results <br /> Historical Groundwater Sample TPH-G an <br /> The Earth9rains Company <br /> Stockton,California <br /> I <br /> l Concentration(ugli) Total Xylenes <br /> TPH-G Benzene <br /> Toluene Ethyibenzene <br /> Well Date 1,400 5,700 <br /> 5,300 3,300 600 4,800 <br /> I PZ-2 10/27/1994 31,000 3,000 <br /> 2,600 <br /> 25,000 4,000 760 <br /> (see note) 11f15/1994 230 340 61 170 <br /> 08/18/1998 16,000 24 255 <br /> 1,300 18 0 990 <br /> 1110811999 31 240 1,200 <br /> 03/13/2000 11,000 76 470 <br /> 07102/2000 13,000 60 450 1,500 <br /> 81 100 650 <br /> 10/19/2000 17,000 14 25 230 <br /> 01/18/2001 6,200 110 450 1,800 <br /> 04/20/2001 27,000 35 74 320 1,100 <br /> 35 820 <br /> 07/19/2001 16,000 140 18 220 <br /> 1023/2001 14,000 91 270 990 <br /> Oi124/2002 15,000 ND(50) <br /> 2.0 310 1,500 <br /> 04262002 17,000 320 <br /> ND(.8 260 310 1,300 <br /> *** <br /> 08!0212002 18,000 4.8 <br /> ND Not detected at or above laboratory detection limit shown in parentheses. <br /> TPH-G Total petroleum hydrocarbons as gasoline. <br /> ug/I Micrograms per liter <br /> Laboratory reports not typical of gasoline <br /> ••� Samples collected on 0426/2002 were from first monitoring event since the installation <br /> of new air sparging well SP-A on 03/142002. <br /> I <br /> {r <br /> I <br /> env/624001321121382egVstockton/histiab <br /> I <br />