Laserfiche WebLink
1 <br /> 4"loguaf rechmcs 1= Page 4 <br /> 2"d Quarter 2005 Groundwater Monitoring Report <br /> Pro3ect No 507 2 <br /> • rune 30,2005 <br /> All non-disposable sampling equipment was decontarrunated using a hot water washer and <br /> detergent before and between uses Disposable gloves were used by the technician to collect <br />' all samples and were changed with each sample collection <br /> A chain of custody document, listing all samples collected, accompanied the samples from <br /> field to laboratory, thereby providing a means to track the movement of and insure the <br /> integrity of the samples <br />' All water purged from each monitoring well and not used as a sample was placed in a 55 <br /> gallon DOT approved container These drums were properly labeled and will be stored on <br /> site until their proper disposition can be arranged <br />' Groundwater monitoring g field logs are included in Appendix C <br /> P <br />' 1.3 Laboratory Analyses <br /> The groundwater samples collected on May 27, 2005, were delivered to Sherwood Labs <br /> Corporation, Department of Health Services Certification No 1400, of Hilmar, California, <br /> (Castle Analytical Lab Certification No 255 1) for analysis <br /> Lab analyzed the groundwater samples for <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX) by EPA method 8020 <br />' + Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 5030/8015 <br /> • MTBE by EPA Method 8020 <br />' The results and detection limits for the above analyses are listed in Table 3 of Appendix A <br /> while the lab analytical results are presented in Appendix B <br /> ' As required under AB2886, the laboratory and groundwater elevation data were submitted <br /> electronically to GeoTracker on June 27, 2005 - confirmation numbers 8837202847 & <br /> 8968174576 <br /> 2.0 FINDINGS AND DISCUSSION <br /> ' The results of the groundwater sample analyses indicate the following <br /> * Wells MW-1, MW-2 and MW-3 remain free of detectable contamination <br /> • MW-4, MW-5 and MW-9 have significant BTEX and TPH-G contamination <br /> • MW-6 contains low levels of TPH-G & MTBE concentrations <br /> • MW-8 has minor TPH-G, BTEX & MTBE contamination <br /> • Water table well MW-7 did not contain BTEX or TPH-G concentrations above the <br /> laboratory reporting limits but it did contain 13 µg/1 MTBE The well has intermittently <br />