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1 <br /> DeBoer Truck Lines, Inc. <br /> 201 West 5th Street, Ripon, California <br /> Quarterly Groundwater Sampling Report <br /> March, 1996 <br /> Narrative <br /> On March 19, 1996, WHF, Inc., in conjunction with HKM Groundwater Monitoring, <br /> conducted field measurements, well pumping and groundwater sampling on three (3) <br /> groundwater monitoring wells located at this site (Figures 1 & 2). <br /> Groundwater elevations were taken from three (3) wells prior to pumping (Table 1 & <br /> Appendix B). Monitoring wells MW-1, MW-2, and MW-3 were evacuated by =aas of a # <br /> F 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 with Blue <br /> Ice(@. <br /> The samples, bailer blanks and trip blank were then logged on a Chain of Custody <br /> (Appendix A) and transported to a State-certified laboratory, California Laboratory <br /> Services, Inc., in Rancho Cordova, California. The analysis requested for the water <br /> samples was EPA method 602 for BTX&E and EPA method 8015/3510 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 construct a <br /> - groundwater gradient map and calculate the gradient (Figure 3). The current gradient is <br /> 0.026 ft/ft at S6111E. Historical gradient maps are included in Appendix C. <br /> 1� <br />