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2. Conductor casing(as needed)shall be ASTM A 139 Electric-fttsion(arc)-welded steel pipe with a minimum tensile strength of 30,000 psi. 3. Conductor casing(as needed) shall be leak proof internal and external flush threads on each joint for connecting. 4. Only casing that has a uniform wall thickness, tensile strength, and threaded ends machined directly to the casing will be allowed. 5. Conductor casing(as needed)shall be a minimum 14 inch diameter with a wall thickness of'/4 inch. 6. Teflon based thread compound may be used to lubricate the threads. a. The use of any other thread compound is prohibited. 7. The well conductor casing shall (as needed)consist of new, 14 inch nominal carbon steel conforming to AWWA C200 and ASTM Al 39. 8. Conductor casing, if necessary,shall extend to the depth of the sanitary seal. C. PVC Casing: 1. The well casing shall be new, 6-inch diameter PVC SDR 17 Class 250, fabricated in lengths not less than twenty feet (20'), except where a shorter section of casing is better suited for the total depth or surface completion. 2. All perforated casing shall comply with specifications ASTM F480, NSF 61, ASTM D2241. For preliminary estimates, perforations shall be of factory mill-slot variety aligned vertically with the axis of the casing. The slots shall be no less than 3 inches in length with an aperture width of 0.032 inch. The dimensions of the slot size openings and screen length will be determined by the Engineer on the basis of the field conditions revealed by the borehole and the grain size of the filter pack material. 3. Section ends shall be machined flat perpendicular to the axis of the casing and shall not vary more than 0.010 inch at any point from a true plane at right singles to the axis of the casing. D. Casing Guides: I. Casing guides(centralizers)shall be fabricated from PVC 2 inches wide by 3/8 inch thick by 2 feet in length. The casing guides shall be of the same physical and chemical properties of the corresponding casing or screen section. 2. Four (4) casing guides shall be spaced equally around the circumference of the well at intervals of 100 feet. beginning at the bottom of the casing. E. Filter Pack: I. The type, size, gradation, and uniformity of sand shall be determined by the Engineer depending on field conditions revealed by the borehole. For preliminary estimate purposes,the filter pack shall be#8 Sand Pack. 2. All filter pack material shall be hard,water-worn,and washed clean of silt,sand,dirt, and foreign matter. Gushed gravel will not be accepted. The specific gravity of the material shall not be less than 2.5 as determined by ASTM D854. 3. The depth interval for the filter pack shall be determined by the I:n�incrr un the basis of field conditions revealed by the borehole. F. Grout: 1. Grout used to construct Ahe annular sanitary seal shall be a ten sack cement-sand grout mixture. The cement shall meet the requirements, including the latest revisions,of ASTM C150 Standard Specification for Portland Cement Type 11, or an approved equivalent. Any additives to the mixture shall meet the requirements, including the latest revisions,of GRINDSTONE JOE'S SUMMARY OF WORK REPLACEMENT WELL 01 11 00-4 June 25,2019