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NMI <br /> 1.0 INTRODUCTION <br /> i This report presents a remedial action plan (RAP) which <br /> addresses hydrocarbon contaminated soil and groundwater at <br /> the Sebastiani Vineyards/Woodbridge Cellars facility, 4614 <br /> West Turner Road, Lodi, California. The location of the <br /> Project site is shown on Figure 1, <br /> The RAP presented in this report is based <br /> data: on the following <br /> - Site Assessment Report, dated July 11, 1,989, by McClaren <br /> Environmental (Appendix i) <br /> - Site Assessment Addendum, dated October 12, 1989, by <br /> McClaren Environmental (Appendix II) <br /> - Monitoring and sampling data from on-site wells (2 <br /> " rounds) collected by WaterWork Corp. <br /> (Appendix III) <br /> - Short term <br /> Pumping data from a test performed by <br /> WaterWork Corp. utilizing well MW2 (Appendix Iv) <br /> R ; <br /> 2.0 SITE HISTORY <br /> A <br /> A 550-gallon underground leaded regular <br /> g <br /> tank was removed from the site on November 4, 1986 , b drags <br /> Claude C. Woods Company of Lodi, California. Soil samples <br /> taken by Canonie Environmental Services of Stockton, <br /> California from directly beneath the former tank at <br /> approximately a feet below grade detected xylene at 600 <br /> paras per million (ppm): total <br /> hydrocarbons at 500 m• volatile petroleum <br /> removal and subsequent ppm; <br /> I excavattotal ion extendedad at 18 to a edtank <br /> epth <br /> en approximately 18. 5 feet, where groundwater was <br /> t:n <br /> encountered. The tank removalfsoil excavation. Gampling <br /> results are presented an page 7 of Appendix I. <br /> ..a <br /> To assess the extent of hydrocarbons in the soil and <br /> ` gloundwater beneath the site, fifteen soil borings, ten of <br /> which were completed as shallow groundwater monitoring <br /> wells, were installed by McLaren between May 15 and June 2, <br /> 1989• The borings and monitor wells were completed to <br /> characterize the lateral and vertical extent of soil and <br /> groundwater contamination associated with leakage <br /> former tank. Results from the <br /> of soil analysis showed the presence <br /> .. <br /> of p y <br /> petroleum hydrocarbons in concentrations exceeding 100 <br /> PPM in the area surrounding the tank excavation (Appendix I, <br /> page 20). Results of groundwater analyses (Appendix T <br /> 24) showed the presence of benzene in concentrations above <br /> the California Department of Health Services (DHS) Maximum <br /> contaminant Levels (MCLs) for drinking water in three of the <br /> ten shallow monitor wells installed during the site <br /> assessment. The-_ site assessment-findings indicated that <br /> -remediati.on of soils and shallow groundwater was warranted.. <br /> Some initial soil remediation has alread been <br /> This is discussed below along with specifc <br /> eluents fof mthe <br /> - proposed remediation program. <br /> 1 <br />