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TABLE 1
<br /> GROUNDWATER MONITORING DATA
<br /> ARCO Service Station No 2168
<br /> 441 Charter Way
<br /> Stockton, California
<br /> Page 2 of 2
<br /> Well/ Static
<br /> Sample Elevation of Nater Elevation of Ethyl- Total
<br /> Number Date Top of Casing Level Groundwater TPHg Benzene Toluene benzene Xylenes Observations
<br /> MW-4
<br /> MW-4 01/20/93 12 34 44 35 -32 01 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-4 01/26/93 12 34 43 99 -31 65 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-4(59) 03/10/93 12 34 42 42 -30 08 110,000 14,000 24,000 3,200 15,000 No FP, No S, Yes 0
<br /> MW-4(59) 06/10/93 12 34 40 68 -28 34 110,000 9,100 17,000 2,700 13,000 No FP, No S, Yes 0
<br /> MW-4(59) 09/02/93 12 34 41 59 -29 25 110,000 12,000 21,000 2,700 13,000 No,FP, No S, Yes 0
<br /> MW-5
<br /> 14W-5 01/20/93 9 28 41 12 -31 84 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-5 01/26/93 9 28 40 77 -31 49 NS NS NS NS NS No FP, No S, Yes 0
<br /> MW-5(55) 03/10/93 9 28 39 11 -29 83 49,000 9,200 6,600 830 4,200 No FP, No S, Yes 0
<br /> MW-5(55) 06/10/93 9 28 37 34 -28 06 37,000 6,400 4,100 870 3,800 No FP, No S, Yes 0
<br /> MW-5(55) 09/02/93 9 28 38 23 -28 95 51,000 7,900 6,600 990 4,800 No FP, No S, Yes 0
<br /> " = Data collected by Emcon Associates
<br /> Analytical results in parts per billion (ppb)
<br /> TPHg = Total petroleum hydrocarbons as gasoline
<br /> Measurements in feet
<br /> Elevation datum is mean sea level
<br /> S = Sheen
<br /> 0 = Obvious product odor
<br /> FP = Free product
<br /> < = Below detection limit for analytical methods used
<br /> Sample designations
<br /> NS = Not sampled
<br /> MW-4(34) - Well ID and sample depth (feet)
<br /> W-24-MW3R Water sample, sample depth (feet), R = rinsate blank
<br /> 1004ccar
<br /> 31009-9
<br />
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