This standard describes sodium hydroxide, anhydrous and liquid, for use in the treatment of potable water, wastewater, or reclaimed water.<\/p>\n
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| 7<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003Sodium hydroxide, NaOH (also known as caustic soda), is available in liquid form in two common concentrations: 50 percent NaOH and 73 percent NaOH. On special request, other solution concentrations, including 25 and 20 percent solutions, I.B.\tHistory.\u2003The first edition of this standard for sodium hydroxide was prepared under the direction of the Water Purification Division of AWWA. The first edition was approved by the AWWA Board of Directors on July 1, 1949. On Oct. 15, 1951, the AWWA Bo 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.\tSafety.\u2003Sodium hydroxide is usually shipped in insulated tank cars or tank trucks and should arrive at the receiving point in liquid form. Depending on geographical location, tank cars are usually equipped with coils for steam heating. When unloadin <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 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 | ||||||
| 10<\/td>\n | III.B.\tModification to Standard.\u2003Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV.\tMajor Revisions.\u2003Major revisions made to the standard in this edition include the following: V.\tComments.\u2003If you have any comments or questions about this standard, please call AWWA Engineering and 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 standa <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | SECTION 2:\u2002REFERENCES SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | SECTION 4:\u2002REQUIREMENTS Sec.\u20024.1\tPhysical Requirements Sec.\u20024.2\tChemical Requirements Sec.\u20024.3\tImpurities <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | SECTION 5: VERIFICATION Sec.\u20025.1\tSampling <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Sec.\u20025.2\tTest Procedures Sec.\u20025.3\tAlkali (Na2O) <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Sec.\u20025.4\tHydroxide <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Sec.\u20025.5\tSodium Carbonate <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | SECTION 6:\u2002DELIVERY Sec.\u20026.1\tMarking <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA B501-19 Sodium Hydroxide (Caustic Soda)<\/b><\/p>\n |