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Table 4
<br />Histoncal Groundwater Sample TPH-G and BTEX Analytical Results
<br />The Earthgrains Company
<br />Stockton, California
<br />Well Date
<br />Concentration (ug/1)
<br />I TPH-G Benzene Toluene Ethylbenzene Total Xylenes
<br />MW -1 07/10/1987
<br />78,000
<br />6,800
<br />17,000
<br />ND(O 3)
<br />4,100
<br />04/26/1988
<br />NT
<br />2,300
<br />9,000
<br />970
<br />8,000
<br />03/19/1990
<br />17,300
<br />5,120
<br />13,000
<br />1,380
<br />10,500
<br />12/20/1990
<br />9,500
<br />7,100
<br />17,500
<br />1,800
<br />14,200
<br />04/09/1992
<br />65,900
<br />1,620
<br />5,850
<br />690
<br />5,120
<br />08/19/1992
<br />96,000
<br />4,720
<br />13,700
<br />1,780
<br />14,000
<br />12/23/1992
<br />88,000
<br />2,650
<br />9,140
<br />740
<br />9,840
<br />04/07/1993
<br />196,000
<br />2,300
<br />11,200
<br />1,840
<br />15,300
<br />07/30/1993
<br />53,000
<br />1,900
<br />6,500
<br />1,300
<br />11,000
<br />10/21/1993
<br />41,000
<br />2,200
<br />6,400
<br />1,400
<br />11,000
<br />12/29/1993
<br />67,000
<br />1,700
<br />4,900
<br />1,500
<br />9,600
<br />03/23/1994
<br />69,000
<br />2,000
<br />7,900
<br />1,500
<br />12,000
<br />06/07/1994
<br />34,000
<br />1,500
<br />5,700
<br />1,200
<br />10,000
<br />09/08/1994
<br />28,000
<br />1,500
<br />3,200
<br />1,200
<br />8,400
<br />02/12/1996
<br />26,000
<br />2,400
<br />3,000
<br />1,200
<br />5,500
<br />05/14/1996
<br />27,000
<br />960
<br />3,400
<br />680
<br />5,100
<br />09/18/1996
<br />24,000
<br />780
<br />2,600
<br />950
<br />3,400
<br />12/16/1996
<br />23,000
<br />890
<br />2,800
<br />570
<br />3,800
<br />07/15/1997
<br />22,000
<br />820
<br />2,600
<br />550
<br />3,500
<br />10/23/1997
<br />24,000
<br />500
<br />1,800
<br />1,100
<br />4,400
<br />01/29/1998
<br />NT
<br />950
<br />2,700
<br />730
<br />4,400
<br />05/21/1998
<br />NT
<br />620
<br />2,300
<br />1,300
<br />6,700
<br />10/28/1998
<br />16,000
<br />170
<br />540
<br />720
<br />3,400
<br />' 05/28/1999
<br />17,000
<br />240
<br />500
<br />760
<br />2,400
<br />08/18/1999
<br />15,000
<br />630
<br />710
<br />440
<br />1,500
<br />11/08/1999
<br />20,000
<br />1,400
<br />1,300
<br />840
<br />2,400
<br />03/13/2000
<br />12,000
<br />280
<br />590
<br />490
<br />1,560
<br />07/02/2000
<br />20,000
<br />1,200
<br />1,400
<br />930
<br />3,200
<br />10/19/2000
<br />16,000
<br />560
<br />390
<br />380
<br />1,700
<br />01/18/2001
<br />18,000
<br />840
<br />720
<br />490
<br />2,100
<br />MW -2 09/08/1987
<br />ND(50)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 5)
<br />03/19/1990
<br />ND(50)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 5)
<br />12/20/1990
<br />1
<br />ND(50)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 5)
<br />04/09/1992
<br />200
<br />8
<br />87
<br />22
<br />103
<br />03/23/1994
<br />1,600
<br />ND(O 5)
<br />27
<br />ND(O 5)
<br />14
<br />06/07/1994
<br />530
<br />046
<br />ND(O 3)
<br />ND(O 3)
<br />39
<br />09/07/1994
<br />1,200
<br />21
<br />055
<br />ND(O 3)
<br />092
<br />02/12/1996
<br />ND(50)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 3)
<br />ND(O 5)
<br />05/13/1996
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />09/17/1996
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />12/1611996
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />07/15/1997
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />10/28/1998
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />05128/1999
<br />ND(50)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />ND(O 5)
<br />Ienv/62400132/121382eg/stockton/histlab
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