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I <br /> ERM-West, Inc. <br /> Suite 200 •2001 P Street• Sacramento, California 95814-5213• (916) 444-WEST(444-9378)•Telefax (916)444-5313 <br /> 20 September 1991 <br /> Y • PYA =h <br /> J <br /> Mr Harlin Knoll SEP 2 5 1999 <br /> Environmental Health Specialist <br /> Public Health Services ENVIRONMU. ,,RL HEALTH <br /> San Joaquan County PERMIT/SERVICES <br /> P.O`Box 2009 <br /> 1601 E Hazelton Avenue <br /> Stockton, CA 95201 <br /> Subject Quarterly Sampling Results of Ground Water from Monitoring <br /> Wells at the Site Located at 1033 East Scotts Avenue, Stockton <br /> Dear MY` Knoll. <br /> Well SFW-1, SFW-2, and SFW-3 were purged and sampled on August 27, <br /> 1991 Table 1 summarizes groundwater elevations measured prior to well <br /> purging and nmpling. The groundwater level has fallen approximately <br /> 1.3 feet since the last measurements were made in May 1991 The <br /> groundwater flow direction is due north and unchanged from the January <br /> and May 1991 measurements (Figure 1) <br /> Table 1 <br /> August 1991 Groundwater Elevations <br /> Well # Casing Elevation GW Elevation <br /> SFW-1 +23 89 ft -36 39 ft <br /> SFW-2 +20 70 ft -36 82 ft <br /> f - <br /> SFW-3 +18.13 ft -36 90 ft <br /> T'erlbn bailers were used to purge the wells prior to sampling The bailers <br /> were decontaminated prior to purging each well by washing with an <br /> Alconox solution and triple-rinsing with deiomzed water Each monitoring <br /> well was developed by bailing until consecutive conductivity, pH, and <br /> temperature measurements varied by less than 10% Table 2 summarizes <br /> the number of well volumes removed from each well prior to sampling and <br /> the stable pH, temperature, and conductivity measurements <br /> TM <br /> An affiliate of The Environmental Resources Management Group with offices worldwide ftt�o <br />