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• TABLE 4 • GROUNDWATER MONITORING DATA ' Cal-Farm Supply Company Depth to Groundwater ' Well ID Date Wellhead Elevation Groundwater* Elevation (Feet MSL) (Feet) (Feet MSL) MW-1 4/13/89 2.70 9.85 -7.15 ' 5/25/89 2.70 11.25 -8.55 6/5/90 2.70 11.13 -8.43 8/30/93 2.70 14.95 -12.25 12/9/93 2.70 14.84 -12.14 3/8/94 2.70 11.62 -8.92 11/1/94 2.70 16.56 -13.86 ' 1/25/95 2.69 10.40 -7.71 5/9195 1 2.69 8.79 -6.10 MW-2 4/13/89 2.33 9.67 -7.34 5/25/89 2.33 10.74 -8.41 6/5/90 2.33 11.78 -9.45 8/30/93 2.33 12.42 -10.09 ' 1219/93 2.33 NA NA 3/8/94 2.33 10.79 -8.46 11/1194 2.33 15.03 -12.70 ' 1/25/95 2.32 11.81 -9.49 5/9/95 2.32 7.91 -5.59 MW-3 4/13/89 2.06 8.83 -6.77 ' 5125/89 2.06 10.28 -8.22 6/5/90 2.06 9.05 -6.99 8/30/93 2.06 13.39 -11.33 ' 1219/93 2.06 13.72 -11.66 3/8/94 2.06 11.02 -8.96 11/1/94 2.06 15.65 -13.59 ' 1/25/95 2.08 6.61 -4.53 5/9/95 1 2.08 7.88 -5.80 MW-4 4/13/89 2.77 10.01 -7.24 ' 5/25/89 2.77 11.25 -8.48 6/5/90 2.77 11.46 -8.69 8130/93 2.77 14.50 -11.73 ' 12/9/93 2.77 14.55 -11.78 3/8/94 2.77 11.80 -9.03 11/1/94 2.77 16.29 -13.52 ' 1/25/95 2.77 10.57 7.80 5/9/95 2.77 8.72 -5.95 Notes: '=Depth to groundwater values were calculated from 8/5/90 to 1/25/95 based on elevation values. ' Monitoring wells MW-1 through MW-4 were surveyed by Walter Wong Engineers on May 9,1989. Monitoring wells MW-1 through MW-4 were re-surveyed by Siegfried Engineering,Inc.on January 25,1995. Monitoring well MW-5 has not been surveyed so is not included in this table. ' NA=Not Available Sources: Preliminary Site Investigation Report dated June 1989,prepared by Kennedy/Jenks/Chilton(K/J/C). ' Phase II Site Investigation and Site Closure Report dated June,1991,prepared by K/J/C. Letter from Wendy Wyels of the CRWQCI3,Ag Regulatory unit to Catherine withworth,dated May 11,1995. Groundwater Sampling Results-Fourth Quarter 1994 letter report dated December 19,1994,prepared by K/J/C. Re-Surveying Letter Report dated February e,1995,prepared by K/J/C.