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Table 4 <br /> Historical Groundwater Sample TPH-G and BTEX Analytical Results <br /> The Earthgrains Company <br /> Stockton, California <br /> Concentration (ugll) <br /> Well DateTPH-G Benzene Toluene Ethylbenzene Total Xylenes <br /> 1 SP-2 11/08/1999 4,000 24 11 15 17 <br /> ** 03/13/2000 ND (50) 39 ND (0 5) 13 72 <br /> 07/02/2000 3900 25 48 19 53 <br /> SP-5 08/18/1999 410 13 18 22 83 <br /> PZ-1 10/27/1994 21,000 4,200 2,500 1,300 4,800 <br /> (see note) 11/15/1994 12,000 1,800 1,400 350 3,100 <br /> 08/18/1999 21,000 3,700 2,800 __ _ _ 820 3,500 <br /> 11108!1999 -1;800 ---190 ' 38 87 71 <br /> ** 03/13/2000 1,400 190 84 44 170 <br /> 07/02/2000 1,400 230 69 120 140 <br /> PZ-2 10/27/1994 31,000 5,300 3,300 1,400 5,700 <br /> (see note) 11/15/1994 25,000 4,000 3,000 600 4,800 <br /> 08/18/1999 16,000 230 340 760 2,600 <br /> 11/0811999 1,300 18 24 61 170 <br /> "* 03/13/2000 11,000 31 240 250 990 <br /> 07/02/2000 13,000 60 76 470 1,200 <br /> ND Not detected at or above laboratory detection limit shown in parentheses <br /> TPH-G Total petroleum hydrocarbons as gasoline <br /> ' ugll Micrograms per liter <br /> ' Laboratory reports not typical of gasoline <br /> *' BTEX results for these samples reported using EPA Method 8260E <br /> * TPH-G results reported using Method 802018015, but, these samples <br /> were analyzed outside of recommended 14 day hold time <br /> Note November 15, 1994 samples collected from piezometers PZ-1 and PZ-2 followed a 2-week <br /> soil vent and air sparge pilot test performed in this area <br /> ' env/624001321121382eglstocktonlhistlab <br />