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RBSNA Industries Inc <br /> y Quality Assurance/Quahty 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 1s achieved and enough water is present to fill <br /> ' sample containers <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 <br /> 5. 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/semivolatlle 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 /> QAQc1092 FNL 13 <br />