Specifications include, but are not limited to: 1) Chemical Composition: Sodium chloride (NaCl), minimum content of 95 percent. Percent of sodium chloride shall be determined in accordance with ASTM D632 or the latest revision thereof. 2) Grading Requirements: The sodium chloride shall conform to the following requirements for particle size distribution, when tested by means of laboratory sieves. Detailed requirements for laboratory sieves are given in the ASTM 14.02 (or successor). a. Rock Salt Size Grading The salt, when tested in accordance with ASTM D632* or the latest revision thereof shall conform to the following requirements for particle size distribution: Sieve Size Percent Passing** 1/2” - (12.5 MM) 100 3/8” - (9.5 MM) 95 - 100 No. 4 - (4.75 MM) 20 - 90 No. 8 - (2.36 MM) 10 - 60 No. 30 - (600 MICRONS) 0 – 15 * A drying temperature of 110°C ± 5°C may be used. **Tolerance of 5 percentage points on the maximum value of the range for each sieve except 1/2" (12.5 mm) and 3/8" (9.5 mm) sizes, on which no tolerance will be allowed. b. Solar Salt Size Grading The Solar Salt, when tested in accordance with ASTM D632* or the latest revision thereof shall conform to the following size for particle size distribution: Sieve Size Percent Passing** 3/4" - (19.05 MM) 100 1/2" - (12.5 MM) 99 - 100 3/8” - (9.5 MM) 95 - 100 1/4" - (6.35 MM) 65 - 90 No. 4 - (4.75 MM) 20 - 80 No. 8 - (2.36 MM) 10 - 30 No. 30 - (600 MICRONS) 0 - 15 * A drying temperature of 110°C + 5°C may be used. ** Tolerance of 5 percentage points on the maximum value of the range for each sieve except 1/2" (12.5 mm) and 3/8" (9.5 mm) sizes, on which no tolerance will be allowed. 3) Moisture Content: a. Rock Salt will be considered to be in a dry condition only when the water content does not exceed one and one-half percent (1.5%) by weight. Water content over one and a half percent (1.5%) will be considered excess. The Town's laboratory report showing excess moisture on such accepted material shall be furnished to the Vendor and the Vendor shall reduce the invoice for the delivered material by weight equal to the weight of the excess moisture. Moisture content in excess of two percent (2%) by weight may, in the judgment of the Town, be cause for rejection of the material. b. Solar Salt will be considered to be in a dry condition only when the water content does not exceed two and one half percent (2.5%) by weight. Water content over two and one half percent (2.5%) will be considered excess. The Town's laboratory report showing excess moisture on such accepted material shall be furnished to the Vendor and the Vendor shall reduce the invoice for the delivered material by weight equal to the weight of the excess moisture. Moisture content in excess of three percent (3.0%) by weight may, in the judgment of the Town, be cause for rejection of the material. Note: Samples of Road Salt to be tested for moisture content shall be taken from either the source or the destination site. 4) Sampling/Testing: All testing must be made in accordance with ASTM C-136 and E-534. All sampling must be in accordance with current MassDOT policy as outlined in the latest MassDOT Material Manual. The latest edition of the MassDOT Material Manual is available at the State House bookstore or may be reviewed at any of the District Offices. All testing shall be made in accordance with current ASTM methods. All sampling shall be in accordance with current MassDOT policy as outlined in the latest MassDOT Material Manual. 5) Material Control: If Road Salt fails to meet the minimum Chemical Requirement the Town may reject the material. If Road Salt is not received in free-flowing, usable condition (i.e. caked or sticky) then the Town may store the Road Salt separately until a test for conditioner (see “Sodium Chloride Conditioner” below) can be completed. If a conditioner test fails then the Vendor must remove the Road Salt at the Vendor’s expense. Any Road Salt that does not meet the specifications and is rejected by the Town must be removed by the Vendor free of charge within five (5) calendar days. Any Road Salt not removed within five (5) calendar days may become the property of Town. The Vendor loses all right to those materials and will not receive any payment for rejected materials. 6) Sodium Chloride Conditioner: In order to prevent caking while in storage following delivery, all bulk Sodium Chloride must be treated with a Sodium Chloride Conditioner prior to delivery. The Conditioner shall be introduced uniformly throughout the Sodium Chloride at a rate of two tenths of a pound (0.2 lb) of conditioner per ton of Sodium Chloride.
