Laserfiche WebLink
y.v <br /> Sod <br /> 1 ' <br /> On December 11, 1995 a representative of PHS-EHD was notified by Wright of the discovery <br /> and removal of a petroleum fuel tank by the trust On December 13, 1995 Wright deposited <br /> the appropriate fees associated with UST removal with representatives of the PHS-EHD on <br /> behalf of the trust <br /> Technical Approach <br /> The tank pit has filled with approximately 4 to 5 inches of water (approximately 300 gallons) <br /> which may reflect the natural water table, be the result of recent storm events or tidal <br /> influence from the adjacent waterway near the island. Wright will purge the water from the pit <br /> place it in a temporary holding tank (about 1300 gallon capacity) label the tank and allow the <br /> pit to recharge prior to the codon of water samples from the pit and the tank. if the water <br /> samples reveal detectable concentrations for the contaminants analyzed for, Wright will <br /> prepare a separate workplan to determine the extent of contamination of groundwater. Purge <br /> water that does not contain detectable concentrations of potential contaminants will be used as <br /> irrigation water for the island. Purge water that does contain detectable concentrations of the <br /> potential-contarninants will be properly transported to a licensed disp6baVtecyci ft faciRty. <br /> Wright-personnel will meet with PHS-EHD representatives at the site and collect the <br /> appropriate number of soil and groundwater samples as required for a 500 gallon UST and from <br /> other locations deemed necessary by PHS-EHD. Soil samples will be collected using hand auger <br /> and 2" brass sample sleeves. The sample auger will be cleaned between each sample collection <br /> event Soil samples will be covered with Teflon TM film and covered with a plastic end caps. The <br /> samples will then be labeled, logged onto a chain of custody, placed inside a Ziploc TM bag, and <br /> placed inside a chilled ice cooler for transport to Priority Environmental Labs of Milpitas, CA, a <br /> state-certified laboratory for chemical analysis. Groundwater samples will be collected in <br /> appropriate sized containers, labeled and documented as noted above. The collected samples will <br /> be analyzed for: <br /> • Total Petroleum Hydrocarbons as Gasoline/8015m <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene/8020 <br /> • Total Lead/6010 <br /> Soil Excavation and Removal <br /> If it is determined after reviewing laboratory analysis of the sampling event described above <br /> that additional soil excavation is required or appropriate Wright personnel will excavate to the <br /> limits necessary to assure contaminants analyzed for are removed and confirmed through <br /> additional analyses. Additional excavation will be performed with Wright equipment and <br /> personnel using a small backhoe and or a front end loader. The stockpiled soil on site <br /> (approximately 20 cubic yards) and_any additional soil remo ad from the tank it_w,�j be <br /> san W and analyzed'(as stated above) at a rate of one-four point composite (lab i lltory <br /> composite) for each 50 cubic yards of material excavated, as required for disposal at Waste <br /> Management, Altamont Landfill and Resource Recovery Facility in Livermore, CA. <br /> If you have arty questions, please call our Tracy office at (209) 833-0758. <br /> Sincerely, <br /> Wright Environmental Services, Inc. <br /> L r Messina <br /> Project Manager <br /> cc: Mr. Wil O'Neill, Estate Admistrator <br /> Mr. Mark Connolly, Esq. <br /> Mr. Scott Maim, Esq. <br /> Mr. Chris Palmer, C.E.G. <br />