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atSH! V.%ci°tf� i�9 �rr'iirl. <br /> California <br /> Wllatlerl.abs <br /> I / 89 FEB $ P I N I <br /> OEr i. <br /> IUSLIG WORKS <br /> February 7, 1989 <br /> Mark Urkhart <br /> County of San Joaquin Public Works <br /> 1810 E. Hazelton <br /> Stockton, CA 9525 <br /> Subject: Sampling and analysis of monitoring wells at the Harney <br /> Lane Sanitary Landfill, Lodi, California . <br /> Dear Mr . Urkhart: <br /> On January 3, 1989, California Water Labs (CWL 's ) Field Support <br /> Services group sampled monitoring wells for County of San Joaquin <br /> Public Works at the Harney Lane Landfill in Lodi, California . <br /> Two of four monitoring wells were sampled that day (MW-3 and MW- <br /> 4 ) , the first and second wells (MW-1 and MW-2) had previously <br /> been sampled on November 8, 1988 . During the previous sampling <br /> event wells 3 & 4 were found to be dry. <br /> The water levels of all four wells were obtained but only MW-3 <br /> and MW-4 were sampled that day. Groundwater elevations were <br /> determined using water-level measurements from field data and <br /> USGS Datum of well casing elevations provided by County of San <br /> Joaquin Public Works . <br /> Examples of the calculations made are provided in Table I . <br /> TABLE I <br /> Calculation of Groundwater Elevations <br /> Elevation to Depth of Water Groundwater <br /> Top of Casing From Top of Elevation <br /> Well r LD. jUSGS Datum) ft . Gasi11g ( ft . ) (USGS-ft . ) <br /> MW-1 98. 46 - 120.15 = -21 . 69 <br /> MW-2 90 . 58 - 114 .95 = -24 . 37 <br /> MW-3 85. 88 - 110 . 75 = -24 . 87 <br /> MW-4 86 .81 - 111 . 00 = -24 . 19 <br /> P.O.Box 4249 9 Modesto,Colifornlo95352 • (209)527-4050 <br />