Laserfiche WebLink
Mr, Harlin Knoll Page 2 <br /> 20 September 1991 <br /> Table 2 <br /> Monitoring Well Development Data <br /> Well # Volumes Bailed pH Temperature Conductivity <br /> SFW-1 11 719 24 2°C 2060µS <br /> SFW-2 10 721 23 5°C 2270µS <br /> SFW-3 12 685 24 8°C 2010 <br /> Following well purging, water samples were obtained by lowering a <br /> decontaminated Teflon bailer into the well The sample water was <br /> immediately transferred by gently pouring the contents of the bailer into <br /> clean volatile organic analysis (VOA) vials, filling each completely Care <br /> was taken to minimize any agitation of the water sample The sample vial <br /> was then capped with a Teflon septum cap such that zero headspace was <br /> achieved, and no air bubbles were visible when turned upside-down <br /> Additional sample water was transferred into a 1-liter amber glass <br /> container. The sample containers (VOA vials and 1-titer amber glass) were <br /> labeled with the well number, date, time, sampler's imtials, location, and <br /> analysis required, and stored on ice in a cooler for delivery to the laboratory <br /> Each sample was logged onto a chain-of-custody form (See Attachment 1) <br /> All purge water from the development of the wells was placed in a 55-gallon <br /> drum pending the results of the groundwater analyses <br /> The water samples were analyzed for Total Petroleum Hydrocarbons by <br /> EPA Method 8015 (Modified) and Benzene, Toluene, Xylenes, and <br /> Ethylbenzene by EPA Method 602 Methods of preparation and analysis of <br /> water samples are summarized in Table 3 along with target detection <br /> limits. <br /> All sample analyses were performed by Curtis & Tompkins, Ltd , <br /> Analytical Laboratories, a State-of-California-certified laboratory which <br /> maintains well-established and documented quality assurance/quality <br /> control (QA/QC) programs. Curtis & Tompkins strictly adheres to Section <br /> 10 ("Quality Control/Quality Assurance") of "Test Methods for Evaluating <br /> Solid Waste" (EPA Manual 600/4-79-019, March 1979). Sections of these two <br /> documents involving the QA/QC aspects of sample collection, preservation, <br /> and sample handling are also followed by ERM-West <br /> Results of water analyses are summarized in Table 4 Original laboratory <br /> reports appear in Attachment 2 No water samples had any detectable <br /> concentrations of TPH or BTX&E <br />