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GROUND ZERO ANALYSIS,INC. Quality Control/Quality Assurance Plan <br /> 2.2 Sample Volumes and Preservation Requirements <br /> Typical sample volumes for soil and water sampling are shown on Table 1. Departures from the <br /> volumes in the table may be made based on consultation with the analytical laboratory. <br /> Sample containers will be pre-cooled and transported to the site in the cooler. All samples will be <br /> preserved as indicated on Table 1 and placed in a refrigerated container immediately after collection. <br /> Chemical ice sealed in plastic will be used to cool and maintain samples at a temperature of <br /> approximately 40C. A high-low thermometer will accompany the samples to document transport <br /> conditions. Further discussion of sample preservation is included in the sampling protocols(Sections <br /> 11 and 12). <br /> 2.3 Delivery of Samples to Laboratory <br /> Samples will be delivered to the laboratory on a daily basis unless otherwise specified by the Project <br /> Manager. Samples will be refrigerated to approximately 4°C for shipping. Shipping containers will <br /> be sealed with security tape to assure sample integrity during shipping. Delivered samples will be <br /> accompanied by a chain of custody record. The laboratory shall note on the chain of custody that <br /> samples were properly preserved and security tape was intact upon arrival. <br /> 3.0 QUALITY CONTROL FIELD SAMPLES <br /> A QC program independent from the laboratory's program will be instituted. The scope of the <br /> program will be developed based on project and regulatory requirements. Field QC samples will <br /> include a travel blank with every sample shipment and at least one duplicate per ten samples. If less <br /> than ten samples of a given type are collected one duplicate will be taken. <br /> Field QC samples may also include Ambient Blanks, Field Replicates, Equipment Blanks and <br /> Background Samples depending upon project requirements. <br /> All QC samples will be assigned independent sample numbers and made indistinguishable from non- <br /> QC samples. <br /> When sampling groundwater, travel blanks will be used to detect the introduction of contaminants <br /> during transportation from the field to the laboratory. The travel blanks will be provided by the <br /> analytical laboratory. They will be taken to the field and accompany the collected groundwater <br /> samples to the laboratory for analysis. The blanks will consist of deionized water or analytically <br /> confirmed organic-free water. The blank is numbered, packaged, and sealed in the same manner as <br /> the other samples. <br /> Water sample duplicates will be created filling two sample bottles from the well bailer. If more than <br /> one bailer volume is required, each bailer volume will be split between containers. <br /> G:\Data\GROUNDZE\STALLWORTH AUTO SALES(N CA)1380\Workp1an\QA.QC Plan.docx <br /> 4 <br />