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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised March 1998 <br /> evidence. Where several types of analysis will be performed for a given well, individual samples will be <br /> 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 comm n volatile/semivolatile to analyses are shown <br /> on Table 2. <br /> Groundwater samples will be collected with a teflon bader with bottom emptying device. Duplicate <br /> samples will be transferred to vials or containers that meet Regional Board specifications (Table 1). <br /> Groundwater from the bailer will be transferred to the pie container by allowing the fluid to flow <br /> slowly along the sides of the vessel. Ali containers will be filled above the top of the opening to form a <br /> positive meniscus. No headspace should be present in the sample container once it is sealed. After the <br /> vial is capped it will be inverted to check for air bubbles. If bubbles are present the sample will be <br /> discarded and replaced. If it is not possible to collect a sample without headspace, the problem will be <br /> noted on the field technician's sampling log. <br /> Immediately following sample collection, samples will b labeled and stored in an ice chest containing <br /> frozen chemical ice sealed in plastic bags. Sample labels vAll contain the following information: <br /> ✓ date and time <br /> W AAdminlShellslQAQC-98,DOC <br />