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Groundwater Quality Sampling Plan <br /> Every effort will be made to reduce contact between the bottles and sampling <br /> equipment. As an added precaution, contact time of the sample with ambient air <br /> will be minimized by replacing caps immediately after the bottles are filled. If <br /> VOC samples are collected, it will be done without air bubbles. This will be <br /> achieved by adding sample slowly until a convex meniscus form at the top of the <br /> vial (i.e., the vial is slightly overfilled) before replacing the cap. Once the cap is <br /> firmly attached, the vial will be inverted and examined for air bubbles. <br /> Metal samples will be field filtered when possible, utilizing a peristaltic pump and <br /> 0.45-micron filters. Sometimes field filtering will not be possible, and samples will <br /> be submitted for laboratory for filtering prior to analysis. <br /> Following completion of groundwater sampling at each monitor well, all re- <br /> usable, non-dedicated sample equipment will be decontaminated in accordance <br /> with the procedures specified above in Section 4.2.1. <br /> 4.4 Sample Preservation, Handling, and Shipment <br /> Groundwater samples will be preserved as follows: <br /> • VOCs (if sampled)—hydrochloric acid (HCI) or no preservative <br /> • Dissolved Metals -none <br /> • Anions/Cations -none <br /> • Other organics and inorganics—none <br /> Preservatives will either be included with the sample containers in small vials or will be <br /> pre-added to the sample containers by the laboratory. If the preservatives need to be <br /> added to the sample containers, sampling personnel will place the specified volume of <br /> preservative to the container during the sampling. Sample filtration may need to be <br /> performed in the field or in the analytical laboratory. <br /> After sample collection, filled and capped containers will be wiped clean, appropriately <br /> labeled, and stored with ice or frozen icepacks in insulated coolers. Sufficient ice or <br /> icepacks will be added to the coolers to maintain sample temperatures at or below 4°C. <br /> Packing material will be added to the coolers as necessary to prevent breakage of glass <br /> containers when they are shipped. <br /> At the end of each day of sampling, collected samples will be delivered or shipped to <br /> the analytical laboratory. A completed and signed COC form will accompany all samples <br /> contained within the cooler. The COC will be kept preventing moisture damage and may <br /> need to be sealed inside a gallon-size ZiplocN bag and placed in the cooler for <br /> shipment. If the sample cooler is shipped for overnight delivery, the cooler will be sealed <br /> pJ11 MOLEN& LG Everist Sampling Plan <br /> � Page 7 of 10 <br /> 46 <br />