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1 <br /> wells were placed in DOT-approved 55 gallon drums The drum contents will be disposed of <br /> using proper methods and protocol after analytical result review A summary of the data <br /> collected is presented in Table I in Appendix B Copies of the field data sheets are presented <br /> ' as Appendix C <br /> 2.3 Groundwater Sampling <br /> ' Proper sample collection and handling are essential to assure the quality of the data obtained <br /> from the given sample Each groundwater sample therefore was collected using a new sterile <br /> ' disposable bailer The sampled water was placed in laboratory prepared sterile 40 milliliter <br /> glass, one liter plastic, and one quart amber containers The sample containers were filled <br /> with water to the top to expel air space and were sealed with teflon-lined caps Water sample <br /> ' containers were labeled with the name of the sampler, the date, the fob number, the, <br /> preservative, and an identifying number The samples were then transported to Sierra <br /> ' Laboratories, in Anaheim, California Full chain of custody protocol was followed during <br /> sample handling and delivery <br /> ' <br /> In addition to samples collected from each well, one duplicate sample was collected from MW- <br /> 3-P and analyzed for BTEX for quality control purposes <br /> t2.4 Groundwater Analyses <br /> Analyses of the groundwater samples were performed by a California certified laboratory in <br /> accordance with state guidelines and EPA protocol The samples were analyzed for'TPH as <br /> gasoline and diesel, BTEX, and total lead using EPA methods 8015, 8020 and 7421, <br /> ' respectively <br /> ' 3.0 FINDINGS <br /> 3.1 Results of Groundwater Laboratory Analyses <br /> 1 Detectable levels of petroleum hydrocarbons as gasoline were reported in all three of the <br /> groundwater samples collected on March 7, 1994 No detectable levels of petroleum <br /> hydrocarbons as diesel were reported Groundwater laboratory results for September, 1992, <br /> September 1993 and March, 1994 are summanzed in Table lI in Appendix B Certified <br /> ' laboratory reports and chain of custody documents are included as Appendix D <br /> 3.2 Groundwater Conditions <br /> ' Most recent groundwater data collected at the site indicates groundwater occurring at depths <br /> ranging from 73 08 feet to 72 07 feet below ground surface (bgs) The groundwater elevation <br /> ranges from a high of 46 96 feet below mean sea level (msl) to a low of 47 63 feet below msl <br /> Groundwater is flowing east northeast with a hydraulic gradient of approximately 0 0066 or <br /> 500713 3 <br /> I <br />