Laserfiche WebLink
Kennedy/Jenks Consultants <br /> Appendix C: Standard Operating Guideline - <br /> Well Construction and Development <br /> CA Introduction <br /> This guideline describes procedures used by Kennedy/Jenks Consultants personnel for well <br /> construction and development following completion of boring and soil sampling procedures <br /> (described in Standard Operating Guideline, Boring and Subsurface Soil Sampling). <br /> C.2 Well Construction Materials <br /> • 4-inch Schedule 40 PVC blank casing <br /> • 4-inch Schedule 40 PVC slotted casing, of appropriate slot size <br /> • 4-inch Schedule 40 PVC threaded and slip caps <br /> • Hasp-locking standpipes <br /> • Ground-level traffic-rated watertight well housing enclosure <br /> • Locking expansion plugs <br /> • Combination or key lock <br /> • Filter pack sand (refer to Standard Operating Guideline, Design of Filter Packs and <br /> Selection of Well Screens for Monitoring Wells) <br /> • Type I or II Portland cement <br /> • Concrete <br /> • Bentonite powder <br /> • 0.25-inch bentonite pellets or chips. <br /> C.3 Well Development Equipment <br /> • 4-inch-diameter vented surge block <br /> • 1-inch dedicated PVC hose for monitoring well development and purging <br /> • Submersible pump (4-inch-diameter wells or larger) <br /> • 55-gallon DOT-approved drums <br /> • Teflon, stainless steel or PVC bailer <br /> • Bladder pump (2-inch diameter wells only) <br /> CA Typical Procedure <br /> 1. Following completion of selected borings, install the monitoring well casing through the center of <br /> the hollow stem auger, drive casing, or open boring. The monitoring well consists of a PVC <br /> Schedule 40 slotted well casing of appropriate diameter and a blank casing with a threaded <br /> bottom cap and a slip or threaded top cap or watertight expansion plug. The casing string must <br /> be held in tension during initial installation. <br /> 2. Place clean, well graded sand around the slotted section of the monitoring well to serve as the <br /> filter pack. The grade of sand is chosen on the basis of aquifer units encountered (refer to <br /> Standard Operating Guideline, Design of Filter Packs and Selection of Well Screens for <br /> Monitoring Wells). The filter pack is emplaced as the auger or temporary casing is removed <br /> from the boring. <br /> Monitoring Well Installation Work Plan, C-1 <br /> Barrel Ten Quarter Circle Land Company, Escalon, California <br /> VAS FOIGroupsVI S-GrouplAd mi n1J obA03V0301 1827_BTQC LCA09-Reports\M W-I nstai l-W Fln\Appendl xV;,,PP_C.doc <br />