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SECTION III - STANDARDS OF CONSTRUCTION: NON- <br /> DRINKING WATER SUPPLY WELLS <br /> A. NON-DOMESTIC WATER SUPPLY WELLS -Non-domestic water <br /> supply wells shall meet all standards as specified in Section II of this Rule. <br /> B. MONITORING WELLS <br /> 1. Monitoring wells that do not penetrate consolidated rock shall not be subject <br /> to these Rules and do not require permits from the OCHD. <br /> 2. Primary (outer)well casing shall meet the casing material and grouting <br /> requirements of Section II (D) and(E) of these Rules respectively, except that <br /> thermoplastic casing may be installed,per the manufacturer's specifications, <br /> without the submission of a consent form signed by the well owner otherwise <br /> monitoring well construction shall meet the requirements of 15A NCAC 2C <br /> .0108 Alternative materials and grouting methods may be submitted to the <br /> OCHD and considered for approval based on evidence provided by the project <br /> licensed professional. <br /> 3. Monitoring well locations shall meet the horizontal setback standards as <br /> required in Section II (A) of these Rules. <br /> 4. Monitoring wells and recovery wells shall be located, designed, constructed, <br /> operated and abandoned with materials and by methods, which are compatible <br /> with the chemical and physical properties of the contaminants involved, <br /> specific site conditions and specific subsurface conditions. <br /> 5. Monitoring well and recovery well boreholes shall not penetrate to a depth <br /> greater than the depth to be monitored or the depth from which contaminants <br /> are to be recovered. Any portion of the borehole that extends to a depth <br /> greater than the depth to be monitored or the depth from which contaminants <br /> are to be recovered shall be grouted completely to prevent vertical migration <br /> of contaminants. <br /> 6. The well shall not hydraulically connect: <br /> a. Separate aquifers; or <br /> b. Those portions of a single aquifer, where contamination occurs in <br /> separate and definable layers within the aquifer. <br /> 7. The well construction materials shall be compatible with the depth of the well <br /> and any contaminants to be monitored or recovered. <br /> 8. The well shall be constructed in such a manner that water or contaminants <br /> from the land surface cannot migrate along the borehole annulus into any <br /> packing material or well screen area. <br /> 9. In monitoring wells, packing material placed around the screen shall extend at <br /> least one foot above the top of the screen. Unless the depth of the screen <br /> 32 <br />