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California 09ional Water Quality Cool Board <br /> Central Valley Region <br /> Linda Adams Robert Schneider, Chair Arnold <br /> Secremryjos Schwarzenegger <br /> Environmental Sacramento Main Office Governor <br /> Profeclion 11020 Sun Center Drive#200, Rancho Cordova, California 95670-6114 <br /> Phone(916)464-3291 •FAX(916)464-4645 <br /> hftp://w .waterboards.ca.gov/centralvalley <br /> REQUIREMENTS FOR 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 <br /> staff approve the workplan. Upon installation of the monitoring wells, the Discharger shall submit <br /> a well installation report which includes the information contained in Section 2, below. All <br /> workplans and reports must be prepared under the direction of, and signed by, a registered <br /> geologist or civil engineer 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 /> California Environmental Protection Agency <br /> Ov Recycled Paper <br />