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2. The Contractor shall submit for the Engineer's review a lab test certifying the pH of <br />Topsoil prior to delivery. Topsoil shall have a pH range of 6.2 to 7.4. Testing for pH <br />value shall be performed in accordance with AASHTO T 289. Agricultural limestone <br />may be added to topsoil in order to raise the pH to meet specification requirements. <br />3. Topsoil furnished by the Contractor shall consist of a natural friable surface soil without <br />admixtures of undesirable subsoil, refuse, or foreign materials. It shall be shredded <br />and free from roots, hard clay, rocks larger than one inch (1 ") in any dimension, noxious <br />weeds, tall grass, brush, sticks, stubble, or other litter, and shall have indicated by a <br />healthy growth of grasses, trees, or other vegetation that is free -draining and non -toxic. <br />4. Topsoil shall not contain more than ten percent (10%) gravel by dry weight of total <br />sample. For the purposes of this specification, gravel is defined per ASTM D422 <br />modified to include only material passing one inch (1 ") and retained on the No. 4 sieve. <br />5. Delivery cost shall be included in the unit cost for each of the following line items within <br />this Division: B-1, B-2, B-3, B-4, and B-6. <br />XVII. DIVISION C: SEWER MATERIALS -CASTINGS <br />A. Prevailing specifications/INDOT Standard Specification Section: 908, 907, 910 <br />B. Additions: <br />1. The manhole 1040A cover and frame shall be the following: <br />a. Cover: East Jordan Iron Works manhole cover 1040A, Neenah R-1642, or approved <br />equal <br />(i) Manhole covers must be labeled "City of South Bend" with "Storm" or "Sanitary" <br />b. Frame: East Jordan Iron Works manhole frame 1045, Neenah R-1642, or approved <br />equal. <br />2. The catch basin cover and frame shall be the following: <br />a. Cover: East Jordan Iron Works catch basin cover (grate) 1020-M1, Neenah R-4370- <br />17-D or approved equal <br />b. Frame: East Jordan Iron Works manhole frame 2996, Neenah R-1646 or approved <br />equal <br />XVIII. DIVISION D: SEWER MATERIALS - RISERS <br />A. Prevailing specifications/INDOT Standard Specification Section: 908, 907, 910 <br />B. Additions: <br />1. Manhole risers shall conform to the following: <br />a. All risers shall include pivoted turnbuckle adjustable riser rings. <br />Version 07/19/2023 Special Provisions - 8 <br />