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• Taft 1 •
<br /> Page 3 of 5
<br /> Groundwater Monitoring Data
<br /> Former ARCO Service Station No. 2168, 441 Charter Way, Stockton, California
<br /> Well Elevation Static Elevation Top
<br /> Sample of Top Water of of Total
<br /> Number Date of CasinE Level Groundwater Screen TPHG Benzene Toluene Eth lbenzene Xylenes MTBE Observations
<br /> MW-3
<br /> MW-3 11/25/96 958 27 66 -18 08 45,000 11,000 1,100 2,100 1,800 <500* No FP,No S, Yes 0
<br /> MW-3 02/24/97 958 2355 -1397 38,000 9,200 460 1,800 1,200 <500* No FP,No S,Yes 0
<br /> MW-3 05/19/97 9 58 2342 -13 84 38,000 9,800 620 1,900 1,100 <600* No FP,No S Yes O
<br /> MW-4
<br /> MW4 01/20/93 1234 4435 -3201 370 NS NS NS NS NS NS No FP,No S,Yes O
<br /> MW-4 01/26/93 1234 4399 -3165 NS NS NS NS NS NS No FP,No S,Yes 0
<br /> MW-4(59) 03/10/93 1234 4242 -3008 110,000 14,000 24,000 3,200 15,000 NA No FP,No S,Yes O
<br /> MW-4(59) 06/10/93 1234 4068 -2834 110,000 9,100 17,000 2,700 13,000 NA No FP,No S, Yes 0
<br /> MW-4(59) 10/28/93 1234 4178 -2944 90,000 1,100 20,000 2,700 13,000 NA No FP,No S, Yes 0
<br /> MW-4(38) 03/23/94 12 34 4123 -2889 38,000 7,600 12,000 2,000 10,000 NA No FP,No S, Yes 0
<br /> MW-4(38) 06/29/94 1234 4106 -2872 43,000 2,400 2,800 1,000 5,800 NA No FP,No S,0=N1=
<br /> MW-4(43) 09/26/94 12 34 4226 -2992 60,000 4,600 7,400 1,300 6,000 NA No FP,No S,O=NE
<br /> MW4 12/01/94 1234 4241 -3007 Well Not Sampled No FP,S=Yes,O=NE
<br /> MW-4(58) 02/16/95 1234 3925 -2691 77,000 9,200 13,000 1,700 8,000 NA No FP,No S,O=NE
<br /> MW-4(58) 05/17/95 1234 34 65 -2231 89,000 11,000 17,000 2,100 9,900 NA No FP,No S,O=NE
<br /> MW-4(59) 08/15/95 1234 3430 -2196 74,000 6,400 10,000 1,600 7,600 NA No FP,No S, Yes 0
<br /> MW4(59) 11/29/95 12 34 3442 -2208 92,000 7,800 12,000 1,700 7,600 NA No FP,No S,Yes O
<br /> MW-4 02/27/96 1234 3167 -19 33 61,000 7,600 8,500 1,600 6,600 NA No FP, No S, Yes 0
<br /> MW-4(58) 05/15/96 1234 3009 -1775 64,000 8,100 8,600 1,600 6,400 <500* No FP,No S,Yes 0
<br /> MW4 08/22/96 1234 3072 -1838 79,000 9,200 11,000 1,800 7,400 <700** No FP,No S,Yes 0
<br /> MW4 11/25/96 12 34 3078 -1844 72,000 8,800 9,300 1,600 6,100 <500* No FP,No S,Yes 0
<br /> MW4 02/24/97 12 34 2682 -1448 40,000 6,700 2,200 900 2,600 <600** No FP, No S,Yes O
<br /> MW4 05/19/97 1234 26 67 -1433 57,000 8,700 6,700 1,300 5,000 <600* No FP, No S,Yes 0
<br /> MW-5
<br /> MW-5 01/20/93 9 28 41 12 -3184 37 0 NS NS NS NS NS NS No FP,No S,Yes 0
<br /> N4W-5 01/26/93 9 28 4077 -3149 NS NS NS NS NS NS No FP,No S,Yes O
<br /> MW-5(55) 03/10/93 928 39 11 -29 83 49,000 9,200 6,600 830 4,200 NA No FP,No S, Yes O
<br /> MW-5(55) 06/10/93 928 3734 -28 06 37,000 6,400 4,100 870 3,800 NA No FP,No S,Yes O
<br /> MW-5(55) 09/02/93 928 3823 -2895 51,000 7,900 6,600 990 4,800 NA No FP,No S,Yes O
<br /> MW-5(55) 10/28/93 928 3846 -29 18 60,000 9,200 9,000 1,200 6,700 NA No FP,No S, Yes 0
<br /> N\XLS\0805U4601\061897R1 XLS emicon
<br /> Sheet I 7/31/97
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