05/02/2001 PLANNING BOARD Minutes

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b. Well Locations and Installation Six wells, in three pairs of shallow (screen set 6 feet below apparent water table) and deep (screen set 100 feet below surface elevation) wells shall be installed and maintained as shown on Sheet 4 of the definitive plan entitled "Subdivision Plan of Land Prepared for CSC Group Located in Mashpee, Mass." dated February 6, 2001 by Christopher Costa & Assoc., P.O. Box 128 / 465 Main Street, East Falmouth, Mass., sheets 1-9. Said wells shall be installed using PVC or other casing approved by the Board of Health, grouted in place, with a protective locking cover and be otherwise in conformance with accepted standards for long-term groundwater monitoring wells. For each well, completion reports and logs, including elevation based on USGS vertical datum, Massachusetts Coordinate Plane coordinates as well as surveyed location tied to an established roadway or property bound, depth ranges of the various soils and sediment layers found in development of each well shall be provided to the Board, the Local Water Resource Management Official (Town Planner) and the Board of Health. The Board of Health, Local Water Resource Management Official and Barnstable County Health and Environmental Department shall not be denied access to said wells and keys to any locking covers shall be provided to the Local Water Resource Management Official. The applicant shall be responsible for securing, recording and providing to the Town any necessary easements or permissions to maintain or monitor said wells. However, monitoring shall continue to be the responsibility of the applicant. C. Compliance Deadlines All monitoring wells shall be installed, located correctly on the Subdivision Plan and all easements shall be secured and presented to the Town prior to any construction on the site or the issuance of building permits for the project, unless an extension of time is approved by the Planning Board. No septic system may be constructed or operated on the site until the above items are completed, and until the initial sampling described below is completed. d. Initial Sampling Round An initial round of water samples shall be extracted from the six monitoring wells prior to the construction of any septic systems on the site to establish baseline groundwater quality at the site, and to provide a reference for future monitoring and interpretation of groundwater quality. The initial sampling round shall include all constituents contained in the list of parameters in Section 174- 27(B)(9) of the Mashpee Zoning Bylaw: sodium, iron, manganese, chloroform, benzene, phosphorous, total coliform bacteria, pH, conductivity, nitrate-nitrogen, carbon tetrachloride, lead, phenolics, PCB (1254), PCB (1260), tricholoroethylene, tetrachloroethylene and 11,1,1-trichloroethane. Samples shall be filtered in the field, held at approximately 4 degrees centigrade and otherwise be taken in accordance with standard procedures recommended by -i0-