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CITY OF LATHROP limited to the project title,delivery location,date(or approximate date)of delivery, name of the material with appropriate classification or model numbers, quantity, name of the manufacturers, statement of compliance with all requirements of the Technical Provisions, and the name,title, and signature of the certifying agent. 2. A factory or mill certification (laboratory test report) shall be submitted with the certificates of compliance for all components of the casing assembly. The factory or mill certification shall not be a substitute for the certificate of compliance, unless it contains all information required for a certificate of compliance as described above. 3. Insufficient,incomplete,or unclear certificates will be rejected,and the Contractor shall be responsible for all delays caused by any need for re-submittal. C. New Materials--All materials provided by the Contractor shall be new. 2.2.2 MATERIALS SPECIFICATIONS A. Sealing Material -- Sealing material, consisting of sand-cement grout shall be employed for abandonment purposes and surface seal in the well. Bentonite chips as well as sand/cement grout may be employed in the well for intermediate seals and to limit infiltration of cement grout into the gravel envelope. 1. The sealing material shall be composed of a slurry of sand-cement grout. The grout shall consist of a sand-cement mixture in accordance with California Department of Water Resources Well Standards, Bulletin 74-81/Supplement 74-90. 2.The mixture for the surface,or sanitary, seal shall conform to State standards and local ordinances for sanitary seals. 3. The bentonite sealing material shall be a graded chip bentonite with granules ranging from 1/4 inch to 3/8 inch. An approved product for the bentonite seals is "HOLEPLUG" as manufactured by the NL Baroid Division of NL Industries, Inc. B. Well Casing and Screen Material 1. The PVC well casing and well screen for the monitoring well will be made of ASTM F- 480-88A Schedule 40 PVC. The ends of each joint shall be threaded and coupled with 0- ring seals. The blank casing will be 2-inch Schedule 40 PVC, ASTM F480-88a. The well screen shall be fabricated from the same material as the blank casing. The perforations shall be machine cut horizontal slots, with openings of 0.030 inch. 2.The bottom of each PVC casing assembly shall be furnished with PVC threaded,pointed, or rounded end cap of the same schedule and size as the casing and the same specifications as described herein. LUHDORFF&SCALMANINI CONSULTING ENGINEERS 9