Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
Geological rechda litc. Page 7 <br /> Groundwater Monitoring Report <br /> Project No.750.2 <br /> February 16,2005 <br /> J the well. Groundwater parameter stabilization was characterized by three successive readings <br /> within 10%. <br /> Before a sample was collected, the well's water level was allowed to recharge to at least 80% <br /> of its initial level. All water removed from the monitoring well and not used as a sample was <br /> placed in a 55 gallon DOT approved container that is properly labeled and temporarily stored <br /> J on-site. <br /> A Waterra© pump and dedicated tubing were used to collect each sample. Extreme care was <br /> exercised while collecting samples to prevent agitation of the water contained in the <br /> Waterra© pump. With minimal sample aeration, water samples were transferred from the <br /> pump into 40-m1 VOA vials preserved with hydrochloric acid. Each sample container was <br /> checked for headspace bubbles, identified and labeled with a unique designation, inserted <br /> into foam holders and placed in a chilled ice chest for transport to the laboratory. <br /> All non-disposable sampling equipment was decontaminated using a steam cleaner before <br /> and between uses. Disposable gloves were used by the technician to collect all samples and <br /> were changed with each sampling event. <br /> J <br /> A chain of custody document, listing all samples collected and their intended analyses, <br /> accompanied the samples from field to the laboratory, thereby providing a means to track the <br /> movement of and ensure the integrity of the samples. <br /> Groundwater monitoring field logs are included in Appendix C. <br /> J <br /> 3.2 Laboratory Analyses <br /> J <br /> The groundwater samples collected on November 26, 2004, were delivered to Sherwood Labs <br /> Corporation of Hilmar, California(ELAP# 1400), for analysis. <br /> J <br /> The groundwater samples were analyzed for: <br /> Benzene,Toluene, Ethyl Benzene, and Total Xylenes (BTEX)by EPA method 8020/8015 <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G)by EPA method 8020/8015 <br /> • Fuel oxygenated compounds (MTBE, DIPE, ETBE, TAME & TBA) by EPA method <br /> 8260 <br /> The detection limits for the above analyses are listed in Table 3 of Appendix A and the lab <br /> data are presented in Appendix B. <br /> As required under AB2886, the laboratory data was submitted electronically to GeoTracker <br /> on December 13, 2004. The confirmation number is 6682819843. <br /> J <br /> �1 <br />