Specifications include, but are not limited to: Fine aggregate shall be a natural sand, or other approved inert material of similar characteristics composed of clean, hard, strong, durable, uncoated particles, and shall be clean and free from organic matter and other deleterious substances. The grading shall meet the following requirements when tested in accordance with the requirements of Arizona Test Method 201. Sieve Size 3/8" Percent Passing 100; No. 4 95-100, No. 8 80-100, No. 16 50-85, No. 30 25-60, No. 50 10-30, No. 100 2-10, No. 200 0-2. Fine aggregate shall have an average sand equivalent value of not less than 75 when tested in accordance with the requirements of AASHTO T-176. It is the responsibility of the contractor to furnish certified certificates of compliance from the material source or certified test results from an approved testing laboratory stating that the proposed concrete sand material conforms to the requirements specified herein. All concrete sand material is to be approved by the Director of Public Works, Area Road Superintendent, or their designated representative prior to delivery or placement...