ARCHIVED REPORTS XR0006112 - Laserfiche WebLink

Home Browse Search

backfilled over-excavation area MW10 Prior to drilling and installing the wells the areas to be drilled were marked in white paint and Underground Service Alert was notified Direct push cores were obtained to determine the intervals to install the well screens MM9 AIB On June 22, 2004 Woodward Drilling used an AMS PowerProabe 9630 Pro-D direct push, rotary ng was used to continuous core (direct push) and recover one inch diameter cores to 30 feet below the surface at MW9B location First occurrence of groundwater was at 12 5 feet below the surface Cores were visually examined for lithology and with a M mRae PID (10 6 e v bulb) to determine if soils and groundwater contained volatile organic compounds Once total depth was obtained and the cores examined the same drilling rig using 8 inch hollow stem augers was used to drill to thirty feet below the surface at the direct push core hole and install well MW9B MW9B is a 2 inch diameter sch 40 PVC well with ten feet of 0 02 slot installed from 19 3 feet to 29 8 feet below the surface Number 3 sand was used as a filter pack from total depth, 30 feet below the surface to 19 feet below the surface Number 2112 sand was placed above the #3 sand from 18 5 to 19 0 feet below the surface Hydrated bentonite was placed above the sand to form a sanitary seal from 15 8 to 18 5 feet below the surface The remaining annular space was filled with neat cement with 5% bentonite tremied from 15 8 to 1 foot below surface A traffic rated flush mounted well vault was set in concrete from 1 foot to surface, see Appendix E MW9A was installed three feet west of MW9B MW9A was drilled with 8 inch hollow stem augers to a total depth of 18 feet below the surface Five feet of 0 01 slot screen was installed from 17 5 to 12 5 feet below the surface Number 2112 sand was used as a filter pack from total depth (18') to 115 feet below the surface Hydrated bentonite was placed above the sand to form a sanitary seal from 10 25 to 11 5 feet below the surface The remaining annular space was filled with neat cement with 5% bentonite trenited from 10 25 to 1 feet below surface A traffic rated flush mounted well vault was set in concrete from 1 foot to surface, see Appendix E AM8 AIB On June 23, 2004 the AMS PowerProabe 9630 Pro-D direct push, rotary rig was used to continuous core (direct push) and recovery one inch diameter cores to 30 feet below the surface at MWBB location First occurrence of groundwater was at 118 feet below the surface Cores were visually examined for lithology and with a MmiRae PID (10 6 e v bulb) to determine if soils and groundwater contained volatile organic compounds Once total depth was obtained and the cores examined the same drilling rig using 8 inch hollow stem augers was used to drill to thirty feet below the surface at the direct push core hole and install well MWBB MWBB is a 2 inch diameter sch 40 PVC well with five feet of 0 02 slot installed from 22 5 feet to 27 5 feet below the surface Number 3 sand was used as a filter pack from total depth, 30 feet below the surface to 22 feet below the surface Hydrated bentonite was placed above the sand to form a sanitary seal from 20 to 22 0 feet below the surface The remaining annular space was filled with neat cement with 5% 5 Sanchez QM 3rd 2004