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;1 1 Eckert Cold Storage Company 757 Moffat Blvd, Manteca, California Quarterly Groundwater Sampling Report June, .1996 Narrative ' On June 28, 1996, WHF Inc , in conjunction with HKM Environmental, Inc , conducted field measurements, well pumping and groundwater sampling on four (4) groundwater ' monitoring wells located at this site (Figure 2) Groundwater elevations were taken from three (3) wells prior to pumping (Table 1 & ' Appendix B) Monitoring wells MW-1, MW-3, and MW-4 were evacuated by means of a steam-cleaned, stainless steel bladder-type pump During the three (3) volume pump down of each well, samples were collected to measure field pH, electrical conductivity and temperature (Table 3 & Appendix B) Once stability was achieved, a minimum of three (3) well volumes were removed and samples were collected with a steam-cleaned disposable bailer The samples were then labeled and placed in an ice chest cooled with ' Blue Ice® The samples, bailer blanks and trip blank were then logged on a Chain of Custody ' (Appendix A) and transported to the State-certified laboratory, California Laboratory Services, in Rancho Cordova, California The analysis requested for the water samples was EPA method 602 for BTX&E/MTBE (Benzene, Toluene, Xylene, and Ethylbenzene I ' Methyl t-butyl ether), EPA method 5030/8015 (GCFID) for Gasoline, and EPA method 3510/8015 for Diesel The analytes and concentrations detected are listed in Table 2 of ' this report ' Groundwater Gradient The water level measurements from the monitoring wells were used to calculate the ' gradient and construct a groundwater gradient map (Figure 3) The gradient for this quarter is 0 0041 ft/ft at N3 VE Historical gradient maps are included in Appendix C 1 1