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a h <br /> near grourid surface. An inspector from the SJCEHD will observe and approve the grouting <br /> " procedures. A traffic-rated vault box; expandable locking cap, and padlock will be installed to <br /> secure each monitoring well. Following installation-activities, a DWR 188 Well Completion <br /> I Report will be prepared for each monitoring well.and submitted.to SJCEHD and DWR. <br /> 4.3.3 Well Development and Sampling <br /> I <br /> Atleast72 hours will elapse between well installation and development. The depth to water <br /> i and product thickness (if present) will be measured in each monitoring well to the nearest 0.01 <br /> a foot,.using an electronic oil/water interface probe. Development will consist of surging the <br /> screened interval of the well with a vented surge block of the same diameter as the casing for <br /> approximately 10 minutes. The monitoring well will be purged using one of the following <br /> methods: <br /> { .. A vacuum truck equipped with a dedicated'PVC stinger or disposable tubing; <br /> • An inertial pump; <br /> • A submersible electric pump; <br /> �I • A centrifugal pump; <br /> I • An air-lift pump; or <br /> •, A bailer. <br /> f Each monitoring well will be purged until at least 10 casing volumes of groundwater have been <br /> removed, the water is free of silt and apparent turbidity to the extent possible, and water quality <br /> parameters (including temperature; pH, and specific conductance)have stabilized. <br /> A record of,the purging methods;water.quality parameters, and volumes of water purged will <br /> be maintained. All purge water will be contained at the Site in properly labeled 55-gallon <br /> drums and transported to an appropriate treatment or disposal facility. All reusable sampling <br /> equipment will be washed with a Liqui-Nox solution, rinsed with tap water, and rinsed with <br /> distilled water. The newly-installed wells will be sampled with the existing wells during future <br /> quarterly monitoring events. <br /> 4.3.4 Monitoring Well Surveying. <br /> In accordance with the State of California GeoTracker requirements, the. locations and <br /> elevations of all wells at the Site must be surveyed. The survey will be performed by a <br /> t <br /> California-licensed Professional Land Surveyor and include latitude, longitude, ground-surface <br /> elevation and top of casing elevation at each well.: Latitude and longitude will be referenced to <br /> the NAD83 datum and elevation will be referenced to the NAVD88 datum. <br /> 1 <br /> A survey data report will be uploaded into California GeoTracker; and the data will be used to <br /> i <br /> } <br /> i. SL-Cents-SCM and Rev.RI WP 2007.09 - 17 - - <br /> t _ <br /> i <br />