Laserfiche WebLink
11 11 <br /> II <br /> . preserved with hydrochloric acid and sealed without headspace All o f <br /> the samples were labeled and stored on ice for transport to Kiff <br /> Analytical, LLC of Davis, California (FLAP #2236) under appropriate chain- <br /> of-custody documentation Well sampling field logs are presented in <br /> Appendix A The site drinking water well was sampled through a sampling <br /> port and was purged prior to sampling <br /> Well sampling purge water was contained in 55-gallon steel drums and left <br /> on-site for temporary storage This water will be removed from the site <br /> by Ecologix Environmental Services of Chico, California for transport to an <br /> off-site recycling facility <br /> 4 . 0 GROUNDWATER SAMPLE ANALYSIS <br /> The groundwater samples were analyzed for total petroleum <br /> hydrocarbons as diesel (TPH-D) by EPA Method 351018015, and total <br /> petroleum hydrocarbons as gasoline (TPH-G), halogenated volatile organic <br /> compounds (HVOCs), fuel oxygenates and alcohols by EPA Method 8 260 <br /> The analytical results for this and previous sampling periods are <br /> presented in Tables Two and Three The certified analytical report and <br />� chain-of-custody documentation are included as Appendix B <br /> Isoconcentration maps for TPH-G, benzene, and MTBE in the shallow <br /> water-bearing zone are presented as Figures 5 through 7, respectively <br /> 5.0 CONCLUSIONS <br /> The analytical results this quarter are generally similar to previous results <br /> Of the 15 wells sampled this quarter, only monitoring wells MW-3, MW-6, <br /> MW-13 and MW-14 contained concentrations of any compounds analyzed <br /> exceeding California Department of Health Services (DHS) maximum <br /> contaminant levels (MCLS) for drinking water In addition, free-floating <br /> hydrocarbons are still present on the groundwater surface in monitoring <br /> well MW-5 <br /> Groundwater samples collected from monitoring well MW-6 contained <br /> 1,100 parts per billion (ppb) toluene, 1,000 ppb ethyl benzene, and 6,800 <br /> ppb total xylenes Groundwater samples collected from monitoring well <br /> MW-13 contained 700 ppb benzene, 260 ppb toluene, 1,100 ppb ethyl <br /> benzene, and 2,500 ppb total xylenes The benzene concentration <br /> detected in groundwater samples collected from monitoring well MW- 13 <br /> and the toluene, ethyl benzene, and total xylenes concentrations detected <br /> in groundwater samples collected from monitoring wells MW-6 a n d <br /> MW-13 exceeded the DHS MCLS for drinking water <br /> Frank's One Stop Quarterly Report — June 2000 Sampling <br /> -3- <br />