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1 <br /> R1=SNA [ndustnes Inc KAMA <br /> Quaitty Assurance/Qualuy Control Plan <br /> Revised November 199^_ <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 Ievel 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 /> Cross contamination from transfemng 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 Ieast 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 /> ' Z 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/semivolatile 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 l rrL 13 <br /> i <br />