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Eckert Cold Storage Company <br /> ' 757 Moffat Blvd, Manteca, California <br /> Quarterly Groundwater Sampling Report <br /> March, 1996 <br /> r <br /> Narrative <br /> On March 13, 1996, WHF Inc , in conjunction with HKM Groundwater Monitoring, <br /> conducted field measurements, well pumping and groundwater sampling on four (4) <br /> groundwater monitoring wells located at this site (Figure 2) <br /> Groundwater elevations were taken from four (4) wells prior to pumping (Table 1 & <br /> Appendix B) Monitoring wells MW-1, MW-3, and MW-4 were evacuated by means of a <br /> steam-cleaned, stainless steel bladder-type pump During the three (3) volume pump <br /> ' down of each well, samples were collected to measure field pH, electrical conductivity and <br /> temperature (Table 3 & Appendix B) Once stability was achieved, a minimum of three <br /> (3) well volumes were removed and samples were collected with a steam-cleaned <br /> disposable bailer The samples were then labeled and placed in an ice chest cooled with <br /> Blue Ice® <br /> The samples, bailer blanks and trip blank were then logged on a Chain of Custody <br /> (Appendix A) and transported to the State-certified laboratory, California Laboratory <br /> Services, in Rancho Cordova, California The analysis requested for the water samples <br /> was EPA method 602 for BTX&E (Benzene, Toluene, Xylene, and Ethylbenzene), EPA <br /> method 5030/8015 (GCFID) for Gasoline and EPA method 3510/8015 for Diesel The <br /> analytes and concentrations detected are listed in Table 2 of this report <br /> Groundwater Gradient <br /> The water level measurements from the monitoring wells were used to calculate the <br /> gradient and construct a groundwater gradient map (Figure 3) The gradient this quarter <br /> ranges from 0 0085 ft/ft at N55°W Groundwater elevations have risen, since last quarter, <br /> by an average of 3 47 feet across the site Historical gradient maps are included in <br /> ' Appendix C <br /> 1 <br />