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GROUND ZERO ANALYSIS, INC. <br />$ 4 1 a 0 <br />0 <br />Quality Control/Quality Assurance Plan <br />Soil samples will be obtained direct push rods that will be advanced to depth and soil collected <br />continuously in an acetate tube with in the rod. The acetate tube will be removed and cut to a <br />size suitable to obtain lab analysis. The tube ends will be sealed with Teflon® tape and plastic <br />end caps, taped and labeled with the following information: data, time, project ID, sample ID, <br />name of sampler and type of analysis. This sample will be immediately placed into a cooler <br />containing dry ice or frozen chemical. The samples will be delivered to a state certified <br />laboratory following under chain of custody protocol within 48 hours of sampling, whenever <br />possible. <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 <br />will also be recorded. These field observations will be noted on a log prepared for each boring. <br />During sampling, latex gloves will be worn to prevent cross -contamination with other samples. <br />The disposable gloves will be discarded after collecting samples from each rod length. Soil <br />samples will be collected at four (4) foot intervals, at significant changes in lithology and <br />intervals of obvious contamination in order to develop a complete profile of soil contamination. <br />Prior to arriving at the sampling site, all sampling equipment will be washed with laboratory <br />grade detergent, and rinsed twice with tap water, and once with deionized water. This procedure <br />will be carried out on-site before sampling of other sample locations, if more than location is to <br />be sampled with the same sampling device(s). <br />Water will be released into the upgradient section of the storm drain and captured at the down <br />gradient section. A groundwater sample will be collected by utilizing a 5 -gallon bucket after <br />approximately 25 -gallons has passed through the system. A bailer will be used to transfer a <br />sample from the bucket into the proper container(s). The samples will be analyzed by EPA <br />method 8015M for the following: <br />1. BTEX <br />2. Total Petroleum Hydrocarbons as Diesel, Motor Oil, and Kerosene <br />Immediately following sample collection, samples will be uniquely labeled and stored in an ice <br />chest containing frozen chemical ice sealed in plastic bags. Sample labels will contain the <br />following information: date, time, project ID, sample ID, and name of sampler and type of <br />analysis. All samples will be transported under chain of custody protocol to a state certified <br />laboratory within 48 hours. <br />Samples will be transported either by GZA personnel or by private courier. Analytical holding <br />times will be considered in determining sampling and shipping schedules. Friday <br />shipment/Saturday laboratory receipt of samples will be coordinated in advance with the <br />laboratory. <br />G:\GROUNDZE\LIONUDAKIS\WorkPlan\QAQC.doc <br />5 <br />