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TABLE 1 i' GROUNDWATER ELEVATION AND ANALYTICAL SUMMARY li �= ARCO Service Station No.5469 E f 130 South Wilson Way,Stockton,California Elevation Top of Well Static Water Groundwater Groundwater Ethyl- Total Well Top of Casing Screen Level Elevation Flow GRO-+ Benzene Toluene benzene Xylenes MTBE[ll Number Date feet ms1 (feet b s) (feet b s) (feet msl) Direction µ µA µ µ µA µ MW-1 NP 06/21/00 16.28 33 36.79 -20.51 SE <50 4.0 <2.0 <2.0 <2.0 <2.0[2] NP 09/08/00 16.28 38.40 -22.12 SE <50 <0.5 <0.5 <0.5 <0.5 <2.5 NP 12/11/00 16.28 38.74 -22.46 SE&N <50 <0.5 <0.5 <0.5 <0.5 3.09[2] P 03/22/01 16.28 37.47 -21.19 E-SE <50 <0.5 <0.5 <0.5 <0.5 2.2[2] ? P 05/24/01 16.28 37.18 -20.90 NC <50 <0.5 <0.5 <0.5 <0.5 <2[21 { 06/25/01 16.28 37.70 -21.42 &NE NS NS NS NS NS NS P 09/14/01 16.28 39,21 -22.93 NE <50 <0.5 <0.5 <0.5 <0.5 <2.0121 P 12/14/01 16.28 40.33 -24.05 NE <50 <0.50 <0.50 <0.50 <0.50 1.6[2] P 02/21/02 16.28 40.31 -24.03 E-NE <50 <0.50 <0.50 <0.50 <0.50 2.8[2] P 04/23/02 16.28 40.18 -23.90 NE <50 <0.50 <0.50 <0.50 <0.50 4.1[2] (. P 09/19/02 16.28 42.18 -25.90 NE <50 <0.50 <0.50 <0.50 <0.50 7.2[2] P 12/11/02 16.28 43.02 -26.74 NE <50 <0.50 <0.50 <0.50 <0.50 7.2[2] NP 01/14/03 16.28 NM NM NC <50[141 <0.50[14] 0.56[141 <0.50[141 <0.50[14] 7.3[21 NP 02/12/03 16.28 NM NM NC <50 <0.50 <0.50 <0.50 <0.50 6.6[21 P 02/26/03 16.28 42.32 -26.04 NE <50 <0.50 <0.50 <0.50 <0.50 6.7[2] P 05/19/03 16.28 41.92 -25.64 Radial <50 A <0.50 A <0.50 A <0.50 A <0.50 A 7.8[2] A P 09/09/03 16.28 43.44 -27.16 NE <50 A <0.50 A <0.50 A <0.50 A 0.55[20] J 5.9[2] A P 12/10/03 16.28 44.04 -27.76 NE <50 A <0.50 A <0.50 A <0.50 A <0.50 A 9.4[2,21] 1 4. P 03/04/04 16.28 43.45 -27.17 NE <50 A <0.50 A <0.50 A <0.50 A <0.50 A 6.6[2] A , 4 F� f E dj Fk I a 5�'ATUS Arco_5469_Q uaderly_Data 1 of 9