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1 z: <br /> ERM-Westor Inc ---- --- _ _ ------ — <br /> Suite 200•2001 P Street Sacramento.California 958145213 (916)444-WEST(44,1.9 378) (elefax(916)444.5313 <br /> May 24, 1991 <br /> �. !`sr r y'�x4'is c .. -•r. <br /> Mr. Harlin Knoll MAY 2 3 1000 <br /> Environmental Health Specialist <br /> Public Health Services <br /> San Joaquin County <br /> P.O.Box 2009 <br /> 1601 E.Hazelton Avenue <br /> Stockton,CA 95201. <br /> Subject: Wells atly Sampling the Site Loci ed at 1033 East Scotts Avenue, Stockton Monitoringesults of G round Water from <br /> Dear Mr. Knoll: <br /> Well SFW-1, SFW-210 and SFW-3 were purged and sampled on May 1, 1991. <br /> Table 1 summarizes groundwater elevations measured prior to well <br /> purging and sampling. The groundwater level has risen approximately 2 <br /> feet since the last measurements were made in January . 991. The <br /> groundwater flow direction is unchanged from the January 1991 <br /> measurement (Figure 1.). <br /> Table 1 <br /> allay 1991 Groundwater Elevations <br /> Well# Cas ingFlevation GW Elevation. <br /> SFW-1 +23,89 fl; -35.01 h <br /> SFW-2 +20.70 ft -35.53 ft. <br /> SFW-3 +18.13 ft -35.57 Il; <br /> Teflon 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 deionized water. Each monito and <br /> ng <br /> well was developed by bailing until consecutive conductivity, p <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 /> rnr^ <br /> An affiliate of The Environmental Resources Management GrOI with offices worldwide ;, <br />