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jTable 4
<br />Historical Groundwater Sample TPH-G and BTEX Analytical Results
<br />The Earthgrains Company
<br />Stockton, California
<br />Concentration (ugll)
<br />Weil
<br />Date
<br />[----rF5H-G Benzene
<br />Toluene Ethylbenzene Total Xylenes
<br />1 SP -1
<br />08/18/1999 20,000 3,300
<br />430
<br />890
<br />4,200
<br />11/08/1999 18,000 2,800
<br />360
<br />780
<br />4,100
<br />**
<br />03/13/2000 20,000 1,400
<br />260
<br />560
<br />2,390
<br />07/02/2000 17,000 1,900
<br />260
<br />800
<br />3,600
<br />1
<br />10/19/2000 26,000 2,000
<br />220
<br />960
<br />4,000
<br />01/18/2001 23,000 1,900
<br />230
<br />940
<br />4,500
<br />SP -2
<br />11/08/1999 4,000 24
<br />11
<br />15
<br />17
<br />**
<br />03/13/2000 ND (50) 39
<br />ND (0 5)
<br />13
<br />72
<br />07/02/2000 3900 25
<br />48
<br />19
<br />53
<br />10/19/2000 6100 33
<br />46
<br />ND(5 0)
<br />2100
<br />01/18/2001 3300 ND(0 5)
<br />8 5
<br />11
<br />18
<br />SP -5
<br />08/18/1999 410 13
<br />18
<br />22
<br />83
<br />PZ -1
<br />10/27/1994 21,000 4,200
<br />2,500
<br />1,300
<br />4,800
<br />(see note)
<br />11/15/1994 12,000 1,800
<br />1,400
<br />350
<br />3,100
<br />08/18/1999 21,000 3,700
<br />2,800
<br />820
<br />3,500
<br />11/08/1999 1,800 190
<br />38
<br />87
<br />71
<br />"*
<br />03/13/2000 1,400 190
<br />84
<br />44
<br />170
<br />07/02/2000 1,400 230
<br />69
<br />120
<br />140
<br />10/19/2000 35,000 4,600
<br />5,200
<br />1600
<br />6,100
<br />01/18/2001 4,700 620
<br />570
<br />190
<br />890
<br />PZ -2
<br />10/27/1994 31,000 5,300
<br />3,300
<br />1,400
<br />5,700
<br />(see note)
<br />11/15/1994 25,000 4,000
<br />3,000
<br />600
<br />4,800
<br />08/18/1999 16,000 230
<br />340
<br />760
<br />2,600
<br />11/08/1999 1,300 18
<br />24
<br />61
<br />170
<br />**
<br />03/13/2000 11,000 31
<br />240
<br />250
<br />990
<br />07/02/2000 13,000 60
<br />76
<br />470
<br />1,200
<br />I
<br />10/19/2000 17,000 81
<br />100
<br />450
<br />1.500
<br />01/18/2001 6,200 14
<br />25
<br />230
<br />650
<br />ND
<br />Not detected at or above laboratorydetection limit shown in parentheses
<br />TPH-G
<br />Total petroleum hydrocarbons as gasoline
<br />ugll
<br />Micrograms per liter
<br />*
<br />Laboratory reports not typical of gasoline
<br />'*
<br />BTEX results for these samples reported using EPA Method 8260B
<br />**
<br />TPH-G results reported using Method 802018015, but, these samples
<br />were analyzed outside of recommended 14 day hold time
<br />Note
<br />November 15, 1994 samples collected from piezometers PZ -1 and PZ -2 followed a 2 -week
<br />sod vent and air sparge pilot test performed in this area
<br />Ienv/624001
<br />32/121382eg/stocktonlhistlab
<br />
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