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A-3 <br /> 1 9 Monitoring Well Purging* and Sampling <br /> Monitoring wells were purged using a disposable bailer until pH, temperature, and conductivity of the <br /> purge water had stabilized and a minimum of three to tour well volumes of water had been removed <br /> Ground water removed from the wells was stored in 55-gallon barrels at the site The barrels were <br /> labeled with corresponding monitoring well numbers and the date of purging After purging, ground <br /> water levels were allowed to stabilize A ground water sample was then removed from each of the wells <br /> using a disposable bailer Samples were collected in air-tight vials, appropriately labeled, and stored on <br /> ice from the time of collection through the time of delivery to the laboratory A chain-0t-custody form <br /> was completed to ensure sample integrity Ground water samples were transported to the laboratory and <br /> analyzed within the EPA-specified holding times for the requested analyses Purge water will be collected <br /> trom the storage barrels in a vacuum truck and transported to an appropriate tacility for treatment and/or <br /> disposal <br /> 2.0 ANALYTICAL PROCEDURES <br /> Selected soil samples submitted to the laboratory were analyzed for BTEX and TPH as diesel, using EPA <br /> Method 8015/8020 Ground water samples submitted to the laboratory were analyzed for BTEX and <br /> TPH as diesel using EPA Method 502 and Modified EPA Method 8015, respectively <br /> 3 0 QUALITY ASSURANCE PLAN <br /> This section describes the field and analytical procedures to be followed throughout the investigation <br /> 3.1 General Sample Collection and Handling Procedures <br /> Proper collection and handling are essential to ensure the quality of a sample Each sample was collected <br /> in a suitable container, preserved correctly for the intended analysis, and stored prior to analysis for no <br /> longer than the maximum allowable holding time Details on the procedures for collection and handling <br /> of soil samples used on this project can be found in Section 1 0 (Methods) <br /> 3.2 Sample Identification and Chain-of-Custody Procedures <br /> Sample identification and chain-of-custody procedures ensure sample integrity and document sample <br /> possession from the time of collection to its ultimate disposal Each sample container submitted for <br /> analysis had a label affixed to identify the job number, sampler, date and time of sample collection, and <br /> t.Rpam srs <br />