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TABLE 1A
<br />CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA
<br />Former Mobil Service Station 99CAS
<br />75 E. Alpine Avenue
<br />Stockton, California
<br />(Page 2 of 7)
<br />Well
<br />Sampling
<br />TOC
<br />DTW
<br />GW Elev.
<br />NAPL
<br />TPHd
<br />TPHg
<br />O&G
<br />MTBE
<br />B
<br />T
<br />E
<br />x PCss SVOCS
<br />1D
<br />Date
<br />(Peet)
<br />(feet)
<br />(feet)
<br />(feet)
<br />(lig/L)
<br />(pg/L)
<br />(pg/L)
<br />(pg/L)
<br />(pg/L )
<br />(pg/L)
<br />(pg/L)
<br />(p9/L) (p9/L) (p9/L)
<br />MW2
<br />05/18/11
<br />15.28
<br />32.94
<br />-17.66
<br />No
<br />---
<br />---
<br />---
<br />---
<br />---
<br />---
<br />... ...
<br />MW2
<br />05/19/11
<br />15.28
<br />---
<br />---
<br />---
<br />1,100d
<br />5,100d
<br />460
<br />3,200
<br /><50
<br /><50
<br /><50 --- ---
<br />MW3
<br />03/26/07
<br />15.37
<br />33.03
<br />-17.66
<br />No
<br />180
<br /><2,500
<br /><25
<br /><25
<br /><25
<br /><25
<br />620
<br />MW3
<br />06/28/07
<br />15.37
<br />34.05
<br />-18.68
<br />No
<br />---
<br />730
<br /><0.50
<br />4.7
<br />7.0
<br />29
<br />150
<br />MW3
<br />09/12/07
<br />15.37
<br />36.56
<br />-21.19
<br />No
<br /><47
<br />220
<br /><0.50
<br />3.4
<br />5.8
<br />14
<br />100
<br />MW3
<br />11/26/07
<br />15.37
<br />36.44
<br />-21.07
<br />No
<br />66d
<br />630
<br />---
<br /><0.50
<br />9.3
<br />7.0
<br />32
<br />200
<br />MW3
<br />02/28/08
<br />15.37
<br />34.00
<br />-18.63
<br />No
<br />500
<br />1,790
<br />---
<br /><0.500
<br />7.85
<br />12.5
<br />152
<br />484 --- ---
<br />MW3
<br />05/29/08
<br />15.37
<br />34.55
<br />-19.18
<br />No
<br />277
<br />2,500
<br />---
<br /><0.500
<br />23.0
<br />28.0
<br />54.8
<br />356
<br />MW3
<br />08/27/08
<br />15.37
<br />36.85
<br />-21.48
<br />No
<br />56d
<br />130
<br /><0.50
<br />2.4
<br />3.7
<br />11
<br />75 --- ---
<br />MW3
<br />11/13/08
<br />15.37
<br />37.33
<br />-21.96
<br />No
<br /><47
<br />620g
<br /><0.50
<br />3.4
<br />1.7
<br />44
<br />350
<br />MW3
<br />01/28/09
<br />15.37
<br />38.04
<br />-22.67
<br />No
<br /><50
<br />390
<br /><1.0
<br />11
<br />7.1
<br />22
<br />170
<br />MW3
<br />04/29/09
<br />15.37
<br />37.76
<br />-22.39
<br />No
<br /><50
<br />3,000
<br />---
<br /><1.0
<br />9.2
<br />5.1
<br />170
<br />1,200
<br />MW3
<br />07/14/09
<br />15.37
<br />39.43
<br />-24.06
<br />No
<br /><50
<br />1,400
<br /><10
<br /><10
<br /><10
<br />58
<br />640 ••. ---
<br />MW3
<br />10/27/09
<br />15.37
<br />39.86
<br />-24.49
<br />No
<br />---
<br />---
<br />-•-
<br />---
<br />---
<br />...
<br />___ ___ ---
<br />MW3
<br />10/28/09
<br />15.37
<br />---
<br />---
<br />---
<br /><50
<br />360
<br /><1.0
<br />3.1
<br />0.84j
<br />8.4
<br />110 --- ---
<br />MW3
<br />01/25/10
<br />15.37
<br />37.95
<br />-22.58
<br />No
<br /><50
<br />520d
<br /><0.50
<br />6.6
<br />0.36j
<br />7.1
<br />110 ...
<br />MW3
<br />04/07/10
<br />15.37
<br />36.20
<br />-20.83
<br />No
<br /><50
<br />340
<br /><0.50
<br />3.7
<br />1.1
<br />3.0
<br />31
<br />MW3
<br />08/09/10
<br />15.37
<br />36.02
<br />-20.65
<br />No
<br />---
<br />---
<br />MW3
<br />08/10/10
<br />15.37
<br />---
<br />---
<br /><50
<br />200
<br /><0.50
<br />1.6
<br /><0.50
<br />0.66
<br />17
<br />MW3
<br />10 05/10
<br />15.37
<br />36.83
<br />-21.46
<br />No
<br />---
<br />---
<br />---
<br />___
<br />__-
<br />--_ ---
<br />MW3
<br />10/06/10
<br />15.37
<br />---
<br />---
<br />••.
<br /><50
<br />250d
<br />---
<br /><0.50
<br />0.59
<br /><0.50
<br />0.35j
<br />7.2 ---
<br />MW3
<br />02/09/11
<br />15.37
<br />35.60
<br />-20.23
<br />No
<br /><50m
<br />280d
<br />•--
<br /><0.50
<br />1.9
<br /><0.50
<br />1.9
<br />38
<br />MW3
<br />05/18/11
<br />15.37
<br />32.33
<br />-16.96
<br />No
<br />---
<br />---
<br />--•
<br />---
<br />---
<br />---
<br />---
<br />__. _._
<br />MW3
<br />05/19/11
<br />15.37
<br />---
<br />---
<br />---
<br /><50
<br /><50
<br /><0.50
<br /><0.50
<br /><0.50
<br /><0.50
<br /><0.50
<br />MW4
<br />03/26/07
<br />16.78
<br />34.65
<br />-17.87
<br />No
<br />6,000
<br />120,000
<br />---
<br /><500
<br />9,400
<br />49,000
<br />2,900
<br />17,000 --- ---
<br />MW4
<br />06/28/07
<br />16.78
<br />35.61
<br />-18.83
<br />No
<br />---
<br />130,000
<br />---
<br /><500
<br />8,600
<br />55,000
<br />3,700
<br />21,000
<br />MW4
<br />09/12/07
<br />16.78
<br />38.15
<br />-21.37
<br />No
<br />2,400
<br />150,000
<br />---
<br /><500
<br />8,800
<br />59,000
<br />4,600
<br />27,000 ---
<br />MW4
<br />11/26/07
<br />16.78
<br />38.01
<br />-21.23
<br />No
<br />4,900d
<br />110,000
<br />---
<br /><500
<br />9,000
<br />50,000
<br />3,700
<br />21,000 --- ...
<br />MW4
<br />02/28/08
<br />16.78
<br />35.56
<br />-18.78
<br />No
<br />13,200
<br />189,000
<br />---
<br />1.07e
<br />9,880
<br />68,100
<br />4,720
<br />27,000
<br />MW4
<br />05/29/08
<br />16.78
<br />36.10
<br />-19.32
<br />No
<br />10,500
<br />171,000
<br />---
<br /><10.0
<br />7,080
<br />67,600
<br />4,830
<br />27,300 ---
<br />MW4
<br />08/27/08
<br />16.78
<br />38.49
<br />-21.71
<br />No
<br />4.000d
<br />89,000
<br />---
<br /><25
<br />7,000
<br />51,000
<br />3,700
<br />23,000
<br />MW4
<br />11/13/08
<br />16.78
<br />38.84
<br />-22.06
<br />No
<br />7,000d
<br />100,00og
<br /><50
<br />5,800
<br />50,000
<br />3,900
<br />20,000
<br />MW4
<br />01/28/09
<br />16.78
<br />39.66
<br />-22.88
<br />No
<br />550
<br />140,000
<br />---
<br /><250
<br />5,500
<br />40,000
<br />3,000
<br />17,000 --- ---
<br />MW4
<br />04/29/09
<br />16.78
<br />39.46
<br />-22.68
<br />No
<br />280
<br />140,000
<br />--•
<br /><1,200
<br />7,500
<br />59,000
<br />4,500
<br />25,000
<br />MW4
<br />07/14/09
<br />16.78
<br />41.17
<br />-24.39
<br />No
<br />250
<br />130,000
<br />---
<br /><1,200
<br />5,900
<br />59,000
<br />3,300
<br />19,000 ---
<br />MW4
<br />10/27/09
<br />16.78
<br />41.55
<br />-24.77
<br />No
<br />---
<br />---
<br />---
<br />---
<br />---
<br />---
<br />---
<br />MW4
<br />10/28/09
<br />16.78
<br />---
<br />---
<br />2,200d
<br />120,000
<br />---
<br /><1,200
<br />6,100
<br />61,000
<br />4,100
<br />24,000
<br />MW4
<br />01/25/10
<br />16.78
<br />39.68
<br />-22.90
<br />No
<br />520d
<br />150,000d
<br /><1,200
<br />5,600
<br />54,000
<br />4,400
<br />26,000
<br />MW4
<br />04/07/10
<br />16.78
<br />37.80
<br />-21.02
<br />No
<br />360
<br />110,000
<br /><1,000
<br />5,800
<br />57,000
<br />4,000
<br />24,000 ---
<br />MW4
<br />08/09/10
<br />16.78
<br />37.69
<br />-20.91
<br />No
<br />520d
<br />99,000d
<br /><1,000
<br />4,500
<br />49,000
<br />3,100
<br />19,000 ---
<br />
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