AWWA B202:2019 pdf download.Quicklime and Hydrated Lime
4.1.3 Mechanical equipment. If quicklime is to be handled by mechanical conveying equipment, the pieces of quicklime shall be no larger than 2 in. (51 mm), except that an occasional slablike piece may be up to 3 in. (76 mm) in length.
4.2.1 Quicklime. Quicklime shall not have less than 80 percent available CaO (see Sec. II.E in the Foreword and Sec. 5.6). Quicklime shall produce more than a 10°C (50°F) rise in temperature in 3 min and shall reach the maximum temperature, as a minimum, in 20 min on slaking according to Sec. 5.4. Quicklime supplied according to the provisions of this standard shall be freshly burned and shall be substantially free from carbonate solids and siliceous residue. Not more than 5.0 percent of the quicklime shall be insoluble material when tested according to Sec. 5.5, unless modified by the purchaser.
4.3.1 General impurities. The quicklime and hydrated lime supplied in accordance with this standard shall contain no soluble inorganic or organic substances in quantities capable of producing deleterious or injurious effects on the health of those consuming water that has been treated properly with the lime products.
4.3.2 Product certifications. The materials are direct additives used in the treatment of potable water. These materials should be certified as suitable for contact with or treatment of drinking water by an accredited certification organization in accordance with NSF/ANSI 60. Evaluation shall be accomplished in accordance with requirements that are no less restrictive than those listed in NSF/ANSI 60. Certification shall be accomplished by a certification organization accredited by the ANSI.
5.1.2.1 For packaged materials in railcars or trucks, at least 2 percent of the packages, but no fewer than five packages, shall be sampled. Individual packages shall be taken from various locations on the railcar or truck being sampled. No sample shall be taken from a broken package.
5.1.2.2 For packaged powdered material, a sampling tube, such as a grain- sampling tube, that takes a core not less than 1 in. (13 mm) in diameter shall be used. The tube shall be inserted sidewise into the package so that it will take a core of the material from substantially the entire width of the package. Three samples shall be taken from each package, evenly spaced over the length of the package.AWWA B202 pdf download.