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During drilling, cuttings will be visually examined for evidence of PHCs In addition, cuttings will <br /> be screened with a portable photoiorvzation detector (PID) The PID readings will also be used to , <br /> monitor air in the breathing zone in accordance with the site health and safety plan <br /> Equipment used during the drilling activities will be decontaminated before arriving on-site, between ' <br /> each pilot boring, and before leaving the site Decontamination will be accomplished using the <br /> following four step process , <br /> Step 1 Egh-pressure, hot-water wash, <br /> Step 2 Scrub with soapy water(non-phosphate or lab-grade detergent), ' <br /> Step 3 High-pressure hot-water rinse, and, <br /> Step 4 Air dry ' <br /> Rinsate from decontamination procedures will be collected and later transferred to a temporary <br /> holding container on-site for proper recyclyingldisposal ' <br /> 3.1.2 Well Installation and Development , <br /> The monitoring wells be constructed of 2-ranch diameter polyvinyl chloride (PVC) blank casing with <br /> machine slotted PVC well screen The final construction of each monitoring well (including depth <br /> and length of screened interval, slot and filter pack size) will be based on subsurface conditions <br /> encountered in the respective pilot boring <br /> The monitoringwells will be constructed within the hollow stem augers The filter pack will be ' <br /> g <br /> emplaced in successive lifts by pouring the sand through the augers from the bottom of each boring , <br /> to a depth of about 1-foot above the top of the well screen (4 feet bgs) The augers will be <br /> withdrawn as the filter pack is emplaced A 1-foot thick bentonite pellet seal will be installed above <br /> the sand pack to a depth of 3 feet bgs An additional 2 feet of annular space will be grouted with ' <br /> neat cement A steel well cover and locking cap will be set in the cement around the top of the <br /> monitoring wells The well cover will be installed about 1 foot below grade in a precast concrete <br /> valve box with a traffic-rated steel cover , <br /> After installation has been completed,the wells will be developed using a bailer or a hand-operated ' <br /> pump During development, the specific electric conductance, pH, temperature, and clarity of the <br /> development water will be measured and monitored Well development will proceed until the water <br /> is relatively colorless and free of sediment and the field water-quality parameters have stabilized ' <br /> Water generated during development and water sampling activities will be placed in temporary <br /> holding containers on-site ' <br /> s3,4dmv vqe 6 PHILIP P. Ross, R.G. ' <br />