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<br /> TABLE 1
<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station Na.548
<br /> 1612 Hammer Lane,Stockton,California
<br /> Well Top of Static Top Groundwater Ethyl- Total
<br /> Sample Sample Casing Water of Groundwater Flow TPH9 Benzene Toluene benzene Xylenes MtBE[1]
<br /> Number Date Elevation Level Screen Elevation Direction #g/L prg/L Pg/L Irg/L pg/L pg/L Observations
<br /> VW-1 (43) 9/29/1998 [NP) NM 28.73 25.00 E 18,800 573 59.0 873 4,120 2,300 No FP,No S,Yes O
<br /> (43) 12/30/1998 [NPI NM 26.50 SE 19,200 2,150 <50 691 3,310 785 No FP,No S,Yes O
<br /> 3/31/1999 NM 24.97 E-SE Not scheduled for sampling No FP,No S,No O
<br /> 6/28/1999 NM 25.99 SE Not scheduled for sampling No FP,No S,No O
<br /> 9/1Q/1999 NM 28.33 E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/1999 NM 27.46 £ Not scheduled for sampling No FP,No S,No O
<br /> 3/28/2000 NM 24.23 -- SE Not scheduled for sampling No FP,No S,No O
<br /> 6/26/2000 NM 25.11 -- E Not scheduled for sampling No FP,No S,No O
<br /> 9/28/2000 NM 27.72 -- E-NE Not scheduled for sampling No FP,No S,No O
<br /> 12/18/2000 NM 25.50 -- E Not scheduled for sampling No FP,No S,No O
<br /> 3/14/2001 NM 24.33 -- E Not scheduled for sampling No FP,No S,No O
<br /> 6119/2001 NM 25.50 -- E Not scheduled for sampling No FP,No S,No O
<br /> 9/11/2001 NM 26.28 - E Not scheduled for sampling No FP,No S,No O
<br /> 1 211 3/200 1 [NP] NM 27.74 E-NE <50 2.5 <0.50 <0.50 <0.50 87[2] No FP,No S,No O
<br /> 3/12/2002 [NP) NM 25.20 E <50 <0.50 <0.50 <0.50 <0.50 0.68(2] No FP,No S,No O
<br /> 6,/17/2002 )NP] NM 26.95 E <50 <0.50 <0.50 <0.50 <0.50 7.8[2] No FP,No S,No O
<br /> 9/9/2002 NP NM 29.54 - NE <50 0.55 <0.5 <0.5 <0.5 60 No FP,No S,No O
<br /> 12!4/2002 NP NM 29.64 NE 310 14 0.59 1.1 6.1 97 No FP,No S,No O
<br /> 3/3/2043 NP NM 28,77 SE <100 <1.0 <1.0 <1.0 <1,0 30[21 No FP,No S,No O
<br /> 5/3/2003 NP NM 28.51 - SE <50 <0.50 <0.50 <0.50 <0.50 22(21 No FP,No S,No O
<br /> 9/18/2003 NP NM 32.03 -- SE 250 23 <2.5 <2.5 2.6 120[2) No FP,No S,No O
<br /> 12/8/2003 NP NM 31.89 NE-SW 170 10 <5.0 <5.0 <5.0 120[2] No FP,No S,No O
<br /> VW-2 (41) 9129/1998 [NP] NM 29.01 25.00 E 13,200 822 <12.5 1,370 754 <125 No FP,No S,Yes
<br /> (41) 12/30/1998 (NP] NM 27.47 SE 8,950 778 <20 1,180 339 <200 No FP,No S,Yes
<br /> 3/31/1999 NM 25.21 - E-SE Not scheduled for sampling No FP,No S,No O
<br /> 6128/1999 NM 26.35 -- SE Not scheduled for sampling No FP,No S,No O
<br /> 9/10/1999 NM 29.29 - E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/1999 NM 28.43 - E Not scheduled for sampling No FP,No S,No O
<br /> 3/28/2000 NM 25.24 SE Not scheduled for sampling No FP,No S,No O
<br /> 6!2612000 NM 26.10 - E Not scheduled for sampling No FP,No S,No O
<br /> 9/28/2000 NM 28.69 E-NE Not scheduled for sampling No FP,No S,No O
<br /> 12/18/2000 NM 26.51 -- E Not scheduled for sampling No FP,No S,No O
<br /> 3/14/2001 NM 24.40 -- E Not scheduled for sampling No FP,No S,No O
<br /> 6/19/2001 NM 25.15 E Not scheduled for sampling No FP,No S,No O
<br /> 9/11/2001 NM 29.40 E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/2001 (NP] NM 28.75 -- E-NE 180[3] 2.6 <0.50 <0.50 <0.50 1.5(2] No FP,No S,No O
<br /> 3/12/2002 [NP] NM 26.48 _ E <50 <0.50 <0.50 <0.50 <0.50 <0.50[21 No FP,No S,No O
<br /> 6/17/2002 [NP] NM 28.03 -- E <50 <0.50 <0.50 <0.50 <0.50 <0.50[21 No FP,No S,No O
<br /> 9/9/2002 NP NM 30.75 NE 200 2,3 0.77 <0.50 <0.50 4,4 No FP,No S,No O
<br /> 12/412002 NP NM 30.25 NE 770 i8 <0.5 <0,50 <0.50 5.4 No FP,No S,No O
<br /> 3/3/2003 NP NM 28.88 SE <100 <1.0 <1.0 <1.0 <1.0 <1.0[2] No FP,No S,No O
<br /> 6/3/2003 NP NM 28.64 SE <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP,No S,No O
<br /> 9/18/2003 NP NM 32,20 SE 360 <5.0 <5.0 <5.0 <5.0 <5.0[21 No FP,No S,No O
<br /> 12!8/2003 NP NM 32.01 NE-SW 490 <5.0 <5.0 <5.0 <5.0 5.0[2] No FP,No S,No O
<br /> K%WprocessVA 8P ARM005481QusrterlyW QTFi 04\0548 OMR 4003 Page 7 of 10
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