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Eckert Cold Storage Company <br /> 757 Moffat Blvd, Manteca, California <br /> Quarterly Groundwater Sampling Report <br /> September, 2000 <br /> Narrative _ <br /> On September 8, 2000, Geo-Analytical Laboratories, Inc., conducted field measurements, <br /> well pumping and groundwater sampling on seven-(7) groundwater monitoring wells <br /> located at this site (Figure 1, 2A & 2B). The on-site domestic well was also sampled <br /> ' during this event. <br /> Groundwater elevations were taken from eight (8) wells prior to pumping (Table 1 & <br /> ' Appendix B). All monitoring wells were evacuated by means of a steam-cleaned, <br /> stainless steel bladder-type pump, except MW-2. The sampler from Geo-Analytical <br /> Laboratories was unable to retrieve water from MW-2. <br /> During the three-(3)volume pump down of each well, samples were collected to measure <br /> field pH, electrical conductivity and temperature (Table 3 & Appendix B). Once stability <br /> ' was achieved, a minimum of three (3) well volumes was removed and samples were <br /> collected with disposable bailers. The samples were then labeled and placed in an ice <br /> chest cooled with Blue ice®. <br /> The samples and trip blank were then logged on a Chain of Custody and transported to <br /> the State-certified laboratory, Geo-Analytical Laboratories, Inc., in Modesto, California. <br /> The analyses requested for the water samples was EPA method 602 for BTX&E <br /> (Benzene, Toluene, Xylene, and Ethyl benzene) and MTBE (Methyl t-butyl ether), EPA <br /> method 5030/Luft (GCF1D) for Gasoline, and EPA method 3510/Luft for Diesel. The <br /> ' domestic well on-site was analyzed using EPA method 524.2. The laboratory analytical <br /> data, chain of custody report, and QA/QC documents can be found in Appendix A of this <br /> report <br /> Groundwater Gradient <br /> The water level measurements from monitoring wells MW-5, MW-6, and MW-7 were <br /> used to calculate the gradient and construct a groundwater gradient map (Figure 3). The <br /> gradient for this quarter is S250W at 0.009 ft/ft. Historical gradient maps are included in <br /> Appendix C. The groundwater elevation at the site has risen since last quarter by an ` <br /> average of 0.11 feet across the site. <br /> 1 <br />