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ATTACHMENT A <br /> REQUIREMENTS FOR <br /> MONITORING WELL INSTALLATION WORKPLANS AND REPORTS <br /> Prior to installation of any groundwater monitoring wells, the Discharger shall submit a workplan <br /> containing, at a minimum, the information listed in Section 'I below. Wells may be installed after staff <br /> approves the workplan. Upon installation of the monitoringwells, the Discharger shall submit a well <br /> installation report that includes the information contained in Section 2 below. All workplans and reports <br /> must be prepared under the direction of, and signed by, a registered geologist or civil engineer licensed <br /> by the State of California. <br /> SECTION 1 - Monitoring Well installation Workplan <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. Proposed Well Numbers <br /> The proposed well numbers for each well must be provided in the text and on the site map. <br /> C. Drilling Details <br /> ■ On-site supervision of drilling and well installation activities, <br /> ■ Description of drilling equipment and techniques, <br /> ■ Equipment decontamination procedures, <br /> ■ Continuous soil sampling and logging, <br /> ■ Logging methods, which shall comply with ASTM D2488-93 Method for Visual <br /> Classification, Standard Practice for Description and Identification of Soils (Visual- <br /> Manual Procedure) for field work. <br /> D. Monitoring Well Design — Diagram and Narrative <br /> The well design must be provided in both a narrative description and in a diagram, which must <br /> include the 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 /> KARL.E. LON(ahEY SOD, P.E.,CHAIR I PAMELA C. CREEDON P.E., SCEE,EXECU'ftvE OFFICER <br /> 11020 Sun Center Drive#200,Rancho Cordova,CA 05670 www.waterboards.ea.govleentralvatley <br /> �j r.ECYCIF.D FAa E� <br />