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GROUND ZERO ANALYSIS,INC. Quality Control/Quality Assurance Plan laboratory, or until the samples are accepted for shipment by a commercial courier. Thereafter,the laboratory performing the analysis will maintain custody. The COC form will be the controlling document to assure that sample custody is maintained. Each time the sample custody is transferred to a different organization, the former custodian will sign the COC on the"Relinquished By"line,and the new custodian will sign the COC on the"Received By" line. The date, time and company affiliation will accompany each signature. The laboratory will immediately notify project personnel in the event the COC is broken.A decision will be made as to the fate of the sample(s) in question on a case-by-case basis. The sample(s) will either be processed "as-is" with custody failure noted along with the analytical data or rejected with resampling scheduled, if necessary. Any nonconformance associated with the samples will be noted on the appropriate certificate or analysis or in a case narrative. The COC forms will be completed, signed, and distributed as follows: • One copy retained by the sample coordinator • The original sent to the analytical laboratory with the sample shipment After the laboratory receives the samples, the laboratory sample custodian will inventory each shipment before signing for it and note on the Cooler Receipt Form any discrepancy in the number of samples, temperature of the cooler or broken samples. The laboratory will immediately notify project personnel of any problems identified with the shipped samples in order to determine the appropriate course of action. 1.5 Sample Transportation Samples will be placed in sample coolers. A temperature blank will be placed in every cooler. All sample containers will be protected with bubble wrap. Ice, double-bagged in resealing bags, will be added to the cooler in sufficient quantity to keep the samples at <6 degrees Celsius for the duration of the shipment to the laboratory. Sample cooler drain spouts will be taped from the inside and outside of the cooler to prevent any leakage. When samples are picked up by the analytical laboratory's courier service, the COC form will be completed and signed by sampler and the analytical laboratory's courier. 2.0 SAMPLE CONTAINERS AND TRANSPORTATION 2.1 Sample Containers All groundwater samples will be placed in containers supplied by the analytical laboratory. Table I summarizes the required sample containers. Soil samples will be collected in either 8-ounce clear glass jars provided by the laboratory or in clean tubes of brass,stainless steel or acetate. Soil samples to be analyzed for volatile compounds will be collected in EnCore samplers per EPA Method 5035 (Table 1). Soil vapor and indoor air samples will be collected in laboratory-supplied Summa canisters (Table 3). G:\Data\GROUNDZE\STALLWORTH AUTO SALES(N CA)1380\Workplan\QA.QC Plan.docx 3