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GROUND ZERO ANALYSIS,INC. Quality Control/Quality Assurance Plan <br /> 8.0 WELL DEVELOPMENT PROTOCOL <br /> Groundwater monitoring wells will be surged and developed prior to sampling activities. <br /> Approximately ten times the volume of water in the casing will be withdrawn if possible. <br /> If the aquifer is slow to recharge, development will continue until recharge is too slow to practically <br /> continue. The volume of water produced versus time will be recorded. All purged groundwater will <br /> be stored on-site in 55 gallon waste drums unless permission is granted by the appropriate regulatory <br /> agency to discharge the water to the ground surface or sanitary sewer. Drummed water will be labeled <br /> with the source of the water to help ensure appropriate disposal based on contamination levels. <br /> 9.0 SOIL AND SOIL VAPOR SAMPLING PROTOCOL <br /> 9.1 Sample Collection during Drilling Activities <br /> A proposal will be submitted to the lead Regulatory Authority with proposed boring/sampling <br /> locations. The exact location and number of borings at each site will be determined in the field by <br /> the Project Geologist/Engineer. <br /> Prior to arriving at the sample site,the drill rig/augers will be steam cleaned and all sample equipment <br /> will be cleaned. Cleaning will be conducted on-site on all sampling equipment between each sample <br /> interval. <br /> If soil samples are obtained using a California modified split-spoon sampler containing three,six inch <br /> long, two inch diameter brass tubes, the following sampling method will be followed. The sampler <br /> will be driven 18 inches ahead of the hollow stem auger by a 140 pound hammer with a 30 inch drop <br /> in accordance with American Society for Testing and Materials(ASTM)Methods D 1586-84 for split <br /> barrel sampling of soil and D 1587-83 for thin-walled tube sampling of soils. The blows required to <br /> drive the sampler each six inch interval will be recorded on the boring log. The sampler will be <br /> removed from the boring and opened to reveal the brass tubes. One tube will be sealed with Teflon <br /> tape and plastic end caps, taped and labeled with the following information: data, time, project ID, <br /> sample ID, name of sampler and type of analysis. This sample will be immediately placed into a <br /> cooler containing dry ice or frozen chemical ice. Soil samples to be analyzed for volatile compounds <br /> will be collected in EnCore samplers per EPA Method 5035. <br /> If soil samples are obtained using a direct push method, sampling will be conducted in accordance <br /> with ASTM Standard Practice for Direst Push Soil Sampling for Environmental Site Characterization <br /> (ASTM D6282/D6282M). Soil samples to be analyzed for volatile compounds will be collected in <br /> EnCore samplers per EPA Method 5035. <br /> Soil in the tubes will be described according to ASTM standard practice for description and <br /> identification of soils (ASTM D-2488-84). Stratigraphic, genetic and other data/interpretations will <br /> also be recorded. Soil properties may also be determined from the sampler shoe. These field <br /> observations will be noted on a log prepared for each boring/well. <br /> G:\Data\GROUNDZE\STALLWORTH AUTO SALES(N CA)1380\Workplan\QA.QC Plan.docx <br /> 7 <br />