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a <br /> r <br /> RESNA Industries Inc. � <br /> J <br /> Quality Assurance/Quality Control Plan <br /> Revised November 1992 ` <br /> measurements will be taken both before and after purging of each well casing volumes. Once <br /> the well is purged and indicator parameters have stabilized, a sample will be collected after the <br /> water level approaches 80 percent of its initial elevation. Where water level recovery is slow, <br /> the sample will be collected after stabilization is achieved and enough water is present to fill <br /> sample containers. <br /> t <br /> Cross contamination from transferring pumps (or bailers) from well to well will be avoided by <br /> utilizing dedicated equipment. Where this is not feasible, thorough cleaning of equipment will <br /> be performed between sampling rounds. Sampling will proceed from the least contaminated to <br /> the most contaminated well, if information is available before sample collection, or if it is <br /> indicated by field evidence. Where several types of analysis will be performed for a given well, <br /> individual samples will be collected in the following order: <br /> 1. Volatile Organics <br /> 2. Purgeable Organic Carbon <br /> 3. Purgeable Organic Halogens <br /> 4. Total Organic Carbon i <br /> S. Total Organic Halogens <br /> 6. Extractable Organics <br /> 7. Total Metals <br /> 8. Dissolved Metals <br /> 9. Phenols <br /> 10. Cyanide <br /> The specific analytical methods be utilized for the common volatile/se mi volatile to analyses are <br /> shown on Table 2. <br /> Groundwater samples will be collected with a teflon bailer with bottom emptying device. <br /> Duplicate samples will be transferred to vials or containers that meet Regional Board <br /> specifications (Table 1). Groundwater from the bailer will be transferred to the sample container <br /> r <br /> QAQctovx.FKL 13 <br /> E <br />