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Proiect Number 2098RV45 November 30 2017 <br /> way as to avoid exposure to sunlight, and the samples will be analyzed within the <br /> prescribed hold time. <br /> 4.7.1 Sample Container Cleanliness and Decontamination <br /> Prior to its use at a site, each sample container will be assured clean by the analytical <br /> laboratory. New containers will be determined to be free of contaminants (e.g., <br /> lubricants) by either the supplier or the analytical laboratory; and the effectiveness of <br /> decontamination (and to detect any possible interference from ambient air) of <br /> reused/recycled containers will be verified with method blanks. After each use, <br /> reusable sample containers will be properly decontaminated. Glass syringes or bulbs <br /> will be disassembled and baked at 240° C for a minimum of 15 minutes or at 120° C <br /> for a minimum of 30 minutes, or be decontaminated by an equivalent method. Plastic <br /> syringes, if used, will be used only once and then properly discarded. <br /> E2C personnel will connect new Teflon® tubing to the top of the existing VP well <br /> tubing, and will utilize a 60 cubic centimeter (cc) syringe and a 3-way valve to purge <br /> the previously determined purge volume. The purge volume will be calculated based <br /> on one (1) cc/ft for 1/8" outside diameter (OD) tubing and five (5) cc/ft for 'A" OD <br /> tubing and the void space in the sand pack around the well filter tip. <br /> The leak compound will be placed in tent-type structures at the connections on the <br /> sampling train, using a paper towel moistened with the leak compound wrapped with <br /> plastic sheeting taped tightly at each end to seal the structure. The sampling <br /> procedure will then commence as detailed above. <br /> 4.7.2 Documentation of VP Well Sampling Protocol <br /> E2C or GSI personnel will document the VP well sampling, and will include the sample <br /> identification, the probe location, date and time of sample collection, sampling depth, <br /> identity of on-Site personnel, weather conditions, sampling methods and devices, soil- <br /> gas purge volumes, volume of soil gas extracted, vacuum of canisters before and after <br /> samples are collected, chain of custody protocols. <br /> 4.7.3 Chain of Custody Records <br /> A chain of custody form will be completed to maintain the custodial integrity of <br /> samples. Probe installation times and sample collection times will be included on the <br /> chain of custody form, and in the report of findings. <br /> 4.8 Analysis of Soil-Gas Samples <br /> 4.8.1 Quality Assurance/Quality Control (QA/QC) <br /> The soil-gas analytical laboratory will follow the QA/QC requirements of the most <br /> current ASGI and the employed EPA Method. If there is any inconsistency between <br /> the ASGI and the EPA Method, the most restrictive and specific requirements will <br /> prevail. Field QC samples will be collected, stored, transported and analyzed in a <br /> manner consistent with site samples. <br /> QA/QC samples will be collected to support the sampling activity. Method blanks will <br /> be used to verify the effectiveness of decontamination procedures, as specified above, <br /> and to detect any possible interference from ambient air. For off-site shipments, a <br /> minimum of one (1) trip blank per day will be collected and analyzed for the target <br /> compounds. Trip blanks will contain laboratory grade ultra pure air. The trip blanks <br /> E2C Remediation 13 <br />