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29 October 2003 <br /> AGE-NC Project No. 96-0235 <br /> Page 4 of 4 <br /> measurements will be considered impacted. At the conclusion of the excavation activities, the soil <br /> stockpile(s) will be covered with plastic. <br /> The open excavation area will be surrounded by temporary fencing. No AGE or subcontractor <br /> personnel will be allowed into any excavation greater than 5 feet bsg without proper excavation <br /> shoring and/or sloping techniques in-practice. <br /> Should ground water be encountered during excavation, a berm will be constructed using clean <br /> overburden and lined with plastic sheeting. The berm area will be utilized to contain saturated soil. <br /> Additionally, submersible pumps will be used to de-water the excavation. Extracted ground water <br /> will be stored in an above-ground poly tank pending disposal. <br /> 5.2. EXCAVATION SOIL SAMPLING <br /> Soil samples collected from the base and sidewalls of the excavation will be obtained using a <br /> backhoe or excavator. Sol] samples will be collected from the bucket of the excavating equipment <br /> by pressing a 3-inch long by 2-inch diameter brass sleeve into the excavated soil material. The <br /> exposed ends of the sample sleeve will be covered with Teflon sheets, capped and sealed with tape. <br /> Soil samples will be collected from soil stockpiles by digging approximately one foot into the soil <br /> stockpile. Soil samples will be collected by hand sampling methods using a stainless steel or carbon <br /> steel trowel, or by pressing a brass sampling sleeve into the soil stockpile. <br /> Following sample collection,each sample sleeve will be properly preserved as described above and <br /> will be labeled with the boring location,depth,time,date and sampler's initials.Appropriately sealed <br /> and labeled samples will be placed in a chilled container under ice and transported under chain-of- <br /> custody procedure to a DHS-certified laboratory. <br /> 5.3. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after being <br /> washed with a solution of Alconox.All down-hole drilling and sampling equipment will be pressure <br /> washed prior to starting each boring. <br /> Advanced GeoEnvironmental,Inc. <br />