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Oorral,Hollow Sanitary Landfi - 3 - 12 July 2006 <br /> ATTACHMENT <br /> REQUIREMENTS FOR <br /> MONITORING WELL INSTALLATION WORKPLANS AND <br /> MONITORING WELL INSTALLATION REPORTS <br /> Prior to installation of groundwater monitoring wells,the Discharger shall submit a workplan <br /> containing, at a minimum,the information listed in Section 1, below. Wells may be installed after staff <br /> approve the workplan. Upon installation of the monitoring wells,the Discharger shall submit a well <br /> installation report which includes the information contained in Section 2, below. All workplans and <br /> reports must be prepared under the direction of, and signed by, a registered geologist or civil engineer <br /> licensed by the State of California. <br /> SECTION 1 -Monitoring Well Installation Workplan and <br /> Groundwater Sampling and Analysis Plan <br /> The monitoring well installation workplan shall contain the following minimum information: <br /> A. General Information: <br /> Purpose of the well installation project <br /> Brief description of local geologic and hydrogeologic conditions <br /> Proposed monitoring well locations and rationale for well locations <br /> Topographic map showing facility location, roads, and surface water bodies <br /> Large scaled site map showing all existing on-site wells,proposed wells, surface drainage <br /> courses, surface water bodies,buildings,waste handling facilities,utilities, and major <br /> physical and man-made features <br /> B. Drilling Details: <br /> On-site supervision of drilling and well installation activities <br /> Description of drilling equipment and techniques <br /> Equipment decontamination procedures <br /> Soil sampling intervals(if appropriate) and logging methods <br /> C. Monitoring Well Design(in narrative and/or graphic form): <br /> Diagram of proposed well construction details <br /> - Borehole diameter <br /> - Casing and screen material, diameter, and centralizer spacing(if needed) <br /> - Type of well caps (bottom cap either screw on or secured with stainless steel screws) <br /> - Anticipated depth of well, length of well casing, and length and position of perforated <br /> interval <br /> - Thickness, position and composition of surface seal, sanitary seal, and sand pack <br /> - Anticipated screen slot size and filter pack <br /> D. Well Development (not to be performed until at least 48 hours after sanitary seal placement): <br /> Method of development to be used(i.e., surge,bail, pump, etc.) <br /> Parameters to be monitored during development and record keeping technique <br />