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C
<br />\®i Table 2
<br />Historical Groundwater Sample TPH-G and BTEX Analytical Results
<br />The Earthgrains Company
<br />Stockton, California
<br />Concentration u /I
<br />Well Date TPH-G Benzene Toluene Ethylbenzene Total Xylenes
<br />P
<br />PZ -1
<br />10/27/1994
<br />11/15/1994
<br />21,000
<br />12,000
<br />4,200
<br />1;800
<br />2,500
<br />1,400
<br />1,300
<br />350
<br />4,800
<br />3,100
<br />08/18/1999
<br />21,000
<br />3,700
<br />2,800
<br />820
<br />3,500
<br />11/08/1999
<br />1,800
<br />190
<br />38
<br />87
<br />71
<br />03/13/2000
<br />1,400
<br />190
<br />84
<br />44
<br />170
<br />07/02/2000
<br />1,400
<br />230
<br />69
<br />120
<br />140
<br />10/19/2000
<br />35,000
<br />4,600
<br />5,200
<br />1,600
<br />6,100
<br />01/18/2001
<br />04/20/2001
<br />4,700
<br />6,700
<br />620
<br />650
<br />570
<br />750
<br />190
<br />410
<br />890
<br />850
<br />07/18/2001
<br />23,000
<br />3,700
<br />3,200
<br />1,300
<br />5,300
<br />10/23/2001
<br />33,000
<br />5,100
<br />4,900
<br />1,700
<br />7,100
<br />p-
<br />01/24/2002
<br />24,000
<br />3,800
<br />2,800
<br />1,300
<br />5,200
<br />04/26/2002
<br />2,800
<br />370
<br />56
<br />160
<br />190
<br />08/02/2002
<br />3,300
<br />280
<br />89
<br />80
<br />330
<br />C02/06/2003
<br />11/06/2002
<br />ND(50)
<br />450
<br />ND(0.5)
<br />75
<br />ND(0.5)
<br />17
<br />ND(0.5)
<br />17
<br />ND(1.0)
<br />46
<br />PZ -2
<br />10/27/1994
<br />31,000
<br />5,300
<br />3,300
<br />1,400
<br />5,700
<br />11/15/1994
<br />25,000
<br />4,000
<br />3,000
<br />600
<br />4,800
<br />08/18/1999
<br />16,000
<br />230
<br />340
<br />760
<br />2,600
<br />11/08/1999
<br />1,300
<br />18
<br />24
<br />61
<br />170
<br />03/13/2000
<br />07/02/2000
<br />11,000
<br />13,000
<br />31
<br />60
<br />240
<br />76
<br />250
<br />470
<br />990
<br />1,200
<br />10/19/2000
<br />17,000
<br />81
<br />100
<br />450
<br />1,500
<br />01/18/2001
<br />6,200
<br />14
<br />25
<br />230
<br />650
<br />04/20/2001
<br />27,000
<br />200
<br />110
<br />450
<br />1,800
<br />07/19/2001
<br />16,000
<br />35
<br />74
<br />320
<br />1,100
<br />10/23/2001
<br />14,000
<br />140
<br />18
<br />220
<br />620
<br />p
<br />L
<br />01/24/2002
<br />04/26/2002
<br />15,000
<br />17,000
<br />ND(50)
<br />ND(2.0)
<br />91
<br />320
<br />270
<br />310
<br />990
<br />1,500
<br />08/02/2002
<br />18,000
<br />4.8
<br />260
<br />310
<br />1,300
<br />11/05/2002
<br />9,000
<br />ND(2.5)
<br />77
<br />130
<br />500
<br />02/05/2003
<br />11,000
<br />ND(5.0)
<br />11
<br />130
<br />390
<br />ND
<br />Not detected at
<br />or above laboratory
<br />detection
<br />limit shown in
<br />parentheses.
<br />C
<br />TPH-G
<br />Total petroleum hydrocarbons as gasoline.
<br />ug/l
<br />Micrograms per liter
<br />Laboratory reports
<br />not typical of gasoline
<br />Samples collected on 04/26/2002 were from first
<br />monitoring event since the
<br />installation
<br />of new air sparging
<br />well SP
<br />-A on 03/14/2002.
<br />I
<br />Eenv/62400132/121382eg/stockton/histlab
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