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^ <br /> SAMPLING PROTOCOL <br /> Page: 2 <br /> cuttings be incorporated into the soil treatment program and <br /> abandoned in place after treatment. <br /> WELL CONSTRUCTION AND DEVELOPMENT <br /> All materials used in well construction will be <br /> thoroughly cleaned prior to introduction into the boring. A <br /> bentonite or bentonite and cement slurry will be placed at <br /> the bottom of the boring as necessary. After the seal has <br /> been allowed to set enough to support the weight of the <br /> casing a 2 to 6 inch OD well casing (stainless steel or PVC) <br /> with and end cap, factory perforated for placement into the <br /> saturated zone, will be placed in the boring. The screen and <br /> filter pack sizes will be designed based upon sieve analysis <br /> data for samples as representative as possible of the water <br /> bearing formation. The casing and end caps will be threaded <br /> or joined by stainless steel screws, no PVC cement will be <br /> used. The filter pack will extend two feet above the <br /> perforated zone. A seal of bentonite pellets one to two feet <br /> thick will be placed in the annular space above the filter- <br /> pack, <br /> ilterpack, followed by a bentonite or cement slurry to grade. All <br /> filter pack and well seals will be tremmied through the auger <br /> as necessary. <br /> A water-tight cap will be placed on top of the well <br /> casing inside a water-tight well box cemented into place. <br /> All wells will be labeled on the exterior of the well head <br /> containment structure with well type and identification <br /> number. On the interior, the label will contain well type, <br /> identification number, depth, and the perforation interval. <br /> Monitoring wells will be developed by airlifting with <br /> compressed nitrogen or pumped using suitable pumping <br /> equipment. <br /> SAMPLING <br /> All soil and groundwater samples will be properly <br /> labeled with project number, date collected, and sample <br /> identification number. All samples will be handled using <br /> standard chain of custody procedures. Field records will <br /> document the above information and other significant data, <br /> such as names of on-site personnel, sampling methods, date <br /> and time of sampling, the number of well volumes removed <br /> before sampling, and any preservatives added or filtration <br /> performed on samples. <br /> The samples will be refrigerated and packaged <br /> immediately for delivery to the laboratory, and will under no <br /> circumstances be opened by anyone other than laboratory <br /> personnel. Chain of Custody records will be maintained at <br /> all times. <br />