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Title: Sampling and Analysis Plan for Environmental Control Number: Revision Date: Page 10 of 23 <br /> Groundwater Monitoring PUE.EN.D.026.03 1 10/18/2019 <br /> • Purge the well and measure field water quality parameters after each wetted casing <br /> volume until it is dry. <br /> • Return to the well in approximately 24 hours. Measure the water level in the well. If <br /> sufficient recovery has occurred, pump/bail the water into a bulk sample container. <br /> From the bulk sample container determine the temperature, pH and conductivity. <br /> Transfer water from the bulk sample container to sample bottles in the order indicated <br /> in Section 4.2 until the suite is complete or until the well purges dry. <br /> For all methods, samples will be stored under ice in an ice chest pending delivery to the <br /> laboratory. <br /> 3.5 Equipment Decontamination Procedures <br /> Dedicated and disposable equipment(e.g.,bailers and rope)will be used to the extent possible <br /> to eliminate the need for equipment decontamination prior to and between uses, and the <br /> preparation and analysis of associated field rinsate blanks. Clean and disposable nitrile gloves <br /> will be worn during purging and sampling activities. Due to the use of dedicated equipment <br /> and disposable supplies, the only equipment typically requiring decontamination are the water <br /> level meter and water quality measurement probes. <br /> Where equipment decontamination is required, the following procedures can be used: <br /> • Spray with Alconox detergent followed by distilled water rinse, or <br /> • Triple water rinse with distilled water, and <br /> • Air dry or paper towel dry the decontaminated equipment and either use it immediately, <br /> or wrap and/or store it appropriately for later use. <br /> Sampling equipment will be decontaminated or bagged (if disposable) between each sample <br /> location. Disposable sampling equipment and supplies (bailers, bailer cord, gloves, etc.) will <br /> be disposed in site waste containers. Purge water will be disposed on the ground near the <br /> wells. <br /> 3.6 Sample Handling and Custody Requirements <br /> This section describes the methods used to ensure samples are managed in accordance with <br /> sampling handling and chain of custody requirements. <br />