ARCHIVED REPORTS_XR0010844 - Laserfiche WebLink

Home Browse Search

it rF' i� i; i, DeBoer Truck Lines, Inc. ' 201 West 5th S&ee4 Ripon, California i. i� Quarterly Groundwater Sampling Report !� December, 1995 i; it i� Narrative On December 13, 1995, WHF Environmental Consultants, Inc., in conjunction with IE,M Groundwater Monitoring, conducted field measurements, well pumping and groundwatdr sampling on three (3) groundwater monitoring wells located at this site (Figures 1 & 2). i li Groundwater elevations were taken from three (3) wells prior to pumping (Table 1 & Appendix B). Monitoring wells MW-1, MW-2, and MW-3 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 I (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 with Blue Ice®. i; l The samples, bailer blanks and trip blank were then togged on a Chain of Custody (Appendix A) and transported to a State-certified laboratory, California Laboratory Services, Inc., in Rancho Cordova, California. The analysis requested for the water samples was EPA method 602 for BTX&E and EPA method 8015/3510 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 construct a groundwater gradient map and calculate the gradient (Figure 3). The current gradient is 0.0003 ft/ft at N10°E. Historical gradient maps are included in Appendix C. i IF Summary ofAnalytical Findings i One well, MW-3, tested "ND", none detected, for BTEX compounds (Benzene, Toluene) Ethyl Benzene, and Xylene) and Diesel this quarter (Table 2). MW-1 tested 0.97 p�11 i� i i;