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TABLE 1 GROUNDWATER ELEVATION AND ANALYTICAL SUMMARY FORMER APACHE PLASTICS FACILITY 2050 EAST FREMONT STREET STQCKT N. CALIFORNIA Depth to Well Groundwater Ethyl- Total Date Water Elevation Elevation GR0(2] Benzene Toluene benzene Xylenes MTBE WELL # Sampled (tt. bgs) (tt. msl) (ft. msl) (µg/L) (µg/L) (µg/1 ) (µg/L) (µg/L) (µg1L) MW- 18 M 05/24/04 49.34 NM NM 450 19 <L0* < 1 .0 * 1 . 1 < 1 .0* 08/23/04 52.77 NM 190 17 0.54 1 .7 1 .0 <0.50 11/ 19/04 52.68 NM <50 4.0 <0.50 0. 80 1 .5 <0.50 03/03/05 50.90 NM <50 <0.50 <0.50 <0.50 <0.50 <0.50 05/ 12/05 48.78 NM 12500 260 4.0 78 25 <2.5 * 08/15/05 50. 18 NM 21600 430 18 100 23 .5 < 1 .5 * 11/22/05 50. 12 NM 530 11 13 2.8 6.3 <0.50 02/07/06 47.89 NM <200**** 4.2 12 < 1 .0**** 6.4 < 1 .0** ** 04/24/06 45.29 20.28 -25.01 390 110 2.0 15 0.57 <0.50 NOTES: GRO = Gasoline Range Organics C4-Cl3 msl = Mean Sea Level MTBE = Methyl tertiary butyl ether bgs = Below Ground Surface S = Shallow Wells (screened 40 to 70 feet bgs) gg/L = micrograms per liter M = Mid-Depth Wells (screened 85 to 90 feet bgs) D = Deep Wells (screened 94 to 120 feet bgs) A = Not Analyzed NM = Not Measured or Well casing elevation has not been surveyed aa * = Reporting limits were increased due to high concentrations of target analytes .J ** = Well MW-3 is obstructed at approximately 23 feet bgs *** = Well was previously identified as MW- 1 . All groundwater samples have been collected from well VEW-2 **** = Reporting limits increased due to sample foaming [1] Confirmation analysis using VOA 2 of 5. [2] Reported as total petroleum hydrocarbons as gasoline (TPHG C3-C14+) prior to second quarter 2006. Historical monitoring and sampling data prior to May 18, 2001, was submitted by previous consultants. Copies of available tables summarizing this data are included in Stratus' Site Conceptual Model (Appendix B), dated September 24, 2002. Apache_Quarterly_Data Page 14 of 14 STRATUS