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Pertinent descriptive information, including the time and ambient weather conditions <br /> will be recorded. Measurements of groundwater level and product thickness (if <br /> present) will be made to the nearest hundredth of a foot. The water level elevation <br /> will be calculated by subtracting the depth to water from the elevation of the surveyed <br /> ® measurement reference point. These data will be used to estimate the local <br /> groundwater gradient and flow direction. <br /> 3.2.6 Groundwa lee Samples <br /> Groundwater sampling of the ten (10) monitor welts will be conducted by using a <br /> precleaned stainless-steel bailer connected to a disposable cotton line. The bailer will <br /> be cleaned prior to use in each well by washing in a solution of Alconox/tap water and <br /> rinsing with Typc 11 reagent water. The disposable line will be replaced between <br /> sampling of each well. Samples will only be collected from those wells free of floating <br /> product. <br /> Water samples will be decanted into 40 ml VOA sample vials with Teflon-lined caps- <br /> and into one liter amber glass sample bottles. The samples will be labeled, sealed and <br /> placed in an ice chest cooled with blue ice for transport to the laboratories under URS <br /> chain-of-custody procedures and documentation. Two VOA and two amber glass <br /> samples will be coller_tcd from each well. One rinsate sample from bailer cleaning will <br /> ° be collected prior to sampling of the wells. <br /> 3.3 )oratory Anal rsil <br /> All groundwater samples will be submitted to California Water Labs in Modesto, <br /> California (Certification #130) within 24 hours of collection. Groundwater samples will <br /> be analyzed for volatile aromatic hydrocarbons (benzene, toluene, and xylene) using <br /> EPA Method 602 and total petroleum hydrocarbons using EPA Method 8015 modified. <br /> 55550.01/05i39/13NION.2 !! <br />