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1 <br /> 1 <br /> ' Eckert Cold Storage Company <br /> 757 Moffat Blvd, Manteca, California <br /> 1 <br /> Quarterly Groundwater Sampling Report <br /> ' June, 1997 <br /> ' Narrative <br /> ' On June 11, 1997, WHF Inc , in conjunction with HKM Environmental, Inc , conducted <br /> field measurements, well pumping and groundwater sampling on four (4) groundwater <br /> ' 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 and trip blank were then logged on a Chain of Custody (Appendix A) and <br /> ' transported to the State-certified laboratory, California Laboratory Services, in Rancho <br /> Cordova, California The analysis requested for the water samples was EPA method 602 <br /> for BTX&E (Benzene, Toluene, Xylene, and Ethylbenzene 1 Methyl t-butyl ether), EPA <br /> ' method 5030/8015 (GCFID) for Gasoline, and EPA method 3510/8015 for Diesel The <br /> analytes and concentrations detected are listed below and in Table 2 of this report <br /> 1 <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 for this <br /> ' quarter vaned from 0 0024 ft/ft at N22°W to 0 0025 ft/ft at N48°E Historical gradient <br /> maps are included in Appendix C <br /> 1 <br /> 1 <br />