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_ r <br /> 30 March 2012 <br /> AGE-NC Project No. 97-0312 <br /> Page 8 of 8 <br /> Soil vapor sample will be collected semi-monthly during the remaining operating period. <br /> The samples will be collected in Tedlar bags within a negative pressure(vacuum)chamber <br /> and TO17 adsorbent charcoal tubes utilizing a calibrated air pump. Following sample <br /> collection, the samples will be placed in a covered container and transported under chain <br /> of custody to a CDPH-certified analytical laboratory for analysis. Each sample will.be <br /> analyzed within 72 hours for the constituents listed in Section 2.3. <br /> 3.5. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly washed with a solution of <br /> Alconox and rinsed with clean water prior to use. All down-hole drilling and sampling <br /> equipment will be pressure washed prior to starting each boring. <br /> j <br /> f <br /> f <br /> i <br /> 4 <br /> i <br /> t <br /> i <br /> I <br /> i <br /> Advanced GeoEnviron mental,Inc. <br />