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1' r i <br /> II 'jW <br /> July 1, 1988 <br /> County of San Joaquin Public Works <br /> 1810 E. Hazelton <br /> Stockton, CA 95205 <br /> Subject: Sampling and Analysis of Monitoring Wells at the Harney Lane <br /> Sanitary Landfill. <br /> Attention: Mark Urkhart <br /> Dear Mr. Urkhart; <br /> On May 24,1988 California Water Lab's (CWL's) Field Support Service Group <br /> sampled monitoring wells for County of San Joaquin Public Works at the <br /> Harney Lane Sanitary Landfill in Lodi, California. <br /> Three of four monitoring wells were sampled that day, (MW-1,2 and 3) . <br /> The fourth well (MW-4) was not sampled on this date because the purge line <br /> for the dedicated pump was disconnected from the well casing and needed <br /> repair. This well was later sampled on June 14, 1988 after repairs were <br /> made. <br /> The water level and depth of each well was measured using an electric <br /> sounder prior to purge and sampling events. Groundwater elevations were <br /> determined utilizing water-level measurements from field data and USGS <br /> datum of well casing elevation provided by County of San Joaquin Public <br /> Works. Examples of the calculations made are provided in Table I. <br /> TABLE I <br /> Calculation of Groundwater Elevation <br /> Elevation to Depth of Water <br /> Top of Casing From Top of Groundwater Elevation <br /> Well I.D. (USGS Datum) Ft. Casing (Ft. ) (USGS-Ft. ) <br /> Well #1 98.46 - 117.0 = - 18.5 <br /> Well #2 90.58 - 111.0 = - 20.4 <br /> Well #3 85.88 - 106.7 = - 20,8 <br /> Well #4 86.81 - 106.4 = - 19.6 <br /> P.O.Box 4249 • Modesto,California 95352 • (204)527-4050 <br />