This standard describes pebble, lump, and ground quicklime and hydrated lime for use in the treatment of potable water, wastewater, or reclaimed water supply service.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003Quicklime results from the calcination of limestone, shell, or equivalent, and consists of calcium oxide in natural association with a lesser amount of magnesium oxide. Hydrated lime is a very finely divided powder resulting from the hydr I.B.\tHistory.\u2003ANSI\/AWWA B202 was first approved as tentative Sept. 9, 1952. It was made standard Sept. 28, 1954. Subsequent revisions to ANSI\/AWWA B202 were prepared by the AWWA Standards Committee and were approved by the AWWA Board of Directors on Jan. I.C.\tAcceptance.\u2003In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | II.\tSpecial Issues. II.A.\tCalcium Oxide.\u2003The amount of available calcium oxide (CaO) varies in limes. Many methods are available for evaluating the available CaO in lime. Some give consistently low results, some are rather time-consuming, and some do not give reproducible re <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | II.B.\tLime.\u2003A lime that slakes at a rate consistent with plant equipment is more economical to use and less difficult to handle. A slaking-rate test to determine the reactivity of lime is included in this standard. This procedure was devised to control th II.C.\tMagnesium and Insoluble Material.\u2003This standard sets no limit on magnesium because keeping the available CaO content within the specified limit should address any excess magnesium problem adequately. No provision is made for high-magnesium lime for <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | II.D.\tSize and Marking.\u2003Sizes of lime are established in the standard to meet the requirements of various types of feed equipment. Alternatively, purchasers may set size requirements to meet specific conditions. A change in size requirements should be mad II.E.\tPurchase Basis.\u2003This standard describes only limes composed mainly of CaO or calcium hydroxide. Special limes, such as dolomitic limes for the removal of silica, are not included. Thus, for the purchase of lime of a different chemical composition, t II.F.\tSampling.\u2003Production-statistical process control testing is being used increasingly as a substitute for per-load sampling and testing and may be used as an alternative. <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | II.G.\tPersonal Protection. III.\tUse of This Standard.\u2003It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A.\tPurchaser Options and Alternatives.\u2003The following information should be provided by the purchaser: <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | III.B.\tModification to Standard.\u2003Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major changes made to the standard in this revision include the following: V.\tComments.\u2003If you have any comments or questions about this standard, please call AWWA Engineering & Technical Services at 303.794.7711, FAX at 303.795.7603, write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098, or email at standard <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | AWWA Standard SECTION 1: GENERAL Sec.\u20021.1\tScope Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | SECTION 2:\u2002REFERENCES SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tPhysical Requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Sec.\u20024.2\tChemical Requirements Sec.\u20024.3\tImpurities <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | SECTION 5:\u2002VERIFICATION Sec.\u20025.1\tSampling <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Sec.\u20025.2\tTest Procedures: General Sec.\u20025.3\tAvailable Calcium Oxide <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Sec.\u20025.4\tSlaking Rate <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Sec.\u20025.5\tObjectionable Insoluble Matter <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | SECTION 6: DELIVERY Sec.\u20026.1\tMarking <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Sec.\u20026.2\tPackaging and Shipping <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA B202-19 Quicklime and Hydrated Lime<\/b><\/p>\n |