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3.7 Well Installation Procedures <br /> • All wells will be installed by state-licensed drilling companies All Federal, State, and Local <br /> regulations will be followed, including obtaining all required permits <br /> • Monitoring well construction detail will be recorded on a boring/well log form <br /> ' • Bentonite seals/grout will be used for surface seals to prevent surface water/product <br /> infiltration <br /> ' Wells will be installed with locking caps with padlocks, and well boxes set approximately one <br /> inch above grade to prevent surface runoff from entering the well box <br /> • Permanent reference marks will be cut in the casing tops to provide consistent reference <br /> points for fluid level measurements <br /> • All well locations and elevations will be surveyed by a state registered Land Surveyor All <br /> well locations and elevations will be plotted on the site map and entered into the project data <br /> base <br /> • Monitoring wells, piezometers, vapor extraction, injection, observation wells and air s ar in <br /> J P g g <br /> wells will be constructed of threaded PVC or stainless steel casing and screens <br /> • Screen casing, filter pack for monitoring or <br /> remediation wells will be installed through the <br /> hollow stem auger flights under unstable borehole wall conditions When borehole wall <br /> iconditions are stable screen, casing, and filter pack may be installed immediately after removal <br /> of auger flights or drill tooling <br /> ' • Unconsolidated soils and sediments will be drilled with a hollow stem auger, consolidated and <br /> cemented sediments, and bedrock will be drilled with rock bit, tricone, air rotary or other <br /> method depending upon the situation <br /> 3.8 Well Development and Monitoring Procedures <br /> ' • Newly installed monitoring or extraction wells are allowed to set at least 24 hours after <br /> completion Wells are developed by alternately pumping and surging Well development will <br /> continue for at least one hour or until the site geologist determines that the discharge is free <br /> and clear of silts and sediments <br /> ' . Wells will be purged as described in Section 3 3 <br /> i <br /> 1 <br /> American Geological Services, Inc. <br /> 8 <br />