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I <br /> TA& 1 <br /> LIQUID LEVEL DATA <br /> SHELL SERVICE STATION <br /> 6131 PACIFIC AVENUE, STOCKTON, CALIFORNIA <br /> (Measurements in feet) <br /> Monitoring Date Reference Depth to Depth to Groundwater Thickness of Well <br /> Well Elevation Groundwater' Floating Elevation2 Floating Liquid Depth <br /> (top of casing)' Liquid Hydrocarbons <br /> Hydrocarbons' <br /> MW-1 10/08/91 101.59 57.18 --- 44.41 --- 64.49 <br /> 02/26/92" r Ov S 54.75 --- 46.84 --- 64.60 <br /> 05/12/92** / 55.98 --- 45.61 --- 64.70 <br /> 07/08/92** 56.69 --- 44.90 --- 64.60 <br /> 10/15/92" 57.89 --- A0 --- 64.60 <br /> efZ, J- <br /> MW-2 10/08/91 100.33 5683 --- 43.50 --- 64.77 <br /> 02/26/92** 54.39 --- 45.94 --- 64.80 <br /> 05/12/92** 55.60 --- 44.73 --- 64.90 <br /> 07/08/92** 56.34 --- 43.99 --- 64.80 <br /> 10/15/92** 57.54 --- 42.79 --- 64.80 <br /> MW-3 10/08/91 10165 58.93 57.85 43.53* 1.08 --- <br /> 02/26/92** 55.65 55.64 46.01* 0.01 --- <br /> 05/12/92** 56.95 56.94 44.71* 0.01 --- <br /> 07/08/92** 57.68 57.67 43.98* 0.01 --- <br /> 10/15/92** 59.95 58.49 42.80* 1.46 --- <br /> NOTES ' = Measurement and reference elevation taken from notch/mark on top north side of well casing <br /> 2 = Elevation referenced to an arbitrary benchmark <br /> --- = Not measured <br /> * = Corrected groundwater elevation- CDTW = DTW- (SP G x LHT) <br /> CDTW = Corrected depth to water <br /> DTW = Measured depth to water <br /> SP G = Specific gravity unweathered gasoline= 0 75,diesel= 0 80 <br /> LHT= Measured liquid hydrocarbon thickness <br /> ** = Data collected by Emcon Associates of Sacramento, California <br /> Well Depth = Measurement from top of casing to bottom of well <br /> Aegis Environmental Inc <br /> 90 02010ecember 15 1992 <br />