【正文】 – Chlorite ? Reduced Risks From: – Cancer – Reproductive Effects – Developmental Effects Rule Structure Rule Structure ? Part 141 – National Primary Drinking Water Regulations – Subpart A: 167。 Analytical Requirements – Subpart L: Disinfection Residuals, DBPs and DBPPs – Subpart O: 167。 : General Requirements – 167。 Analytical Requirements 167。 Monitoring – Disinfectant Residuals ? Chlorine and Chloramines – Routine ? Same Point and Time As Coliform ? Subpart H Systems May Use Results of Monitoring Under Provisions of SWTR – Reduced ? No Reductions 167。 Monitoring – Monitoring Plans ? Each System Must Develop and Implement a Monitoring Plan ? Available 30 Days After Compliance Date ? Subpart H Systems 3,300 Must Submit With First Report ? Plan Must Include: – Locations and Schedules – Compliance Calculation Methodology – Entire Distribution System 167。 (c) – Discussed in DBPP Section (167。 Reporting and Recordkeeping – DBP ? Bromate – Number of Samples in Quarter – Location, Date, and Result – Average of Monthly Averages Over the Past Year – Whether the MCL Was Exceeded 167。 or – Get Waiver From State 167。 Treatment Technique For DBPP ? Step 2: Target pH Alkalinity (mg/L) Target pH 060 60120 120240 240 167。 (b) – Alternative Compliance Criteria – Additional Alternative Compliance Criteria for Softening – Step 1 TOC Reductions – Step 2 TOC Reductions ? Early Monitoring Remended 167。 Reporting and Recordkeeping – DBPP ? Systems Monitoring for DBPP Monthly or Quarterly and Meeting Alternative Compliance Criteria – Criterion Used – Number of Paired Samples in Last Quarter – Location, Date, and Result of Each ? Paired Sample ? Alkalinity – For Those Systems Using Only Chlorine and Whose TTHM and HAA5 Levels Are No More Than 50 Percent of the MCLs ? The TTHM and HAA5 Running Annual Averages – Whether the System Is in Compliance 167。 (h) ? (2) How the State Will Qualify Operators Subject to the Provisions of Subpart L ? Satisfied By: – A Description of the State’s Program for Determining the Minimum Qualifications Necessary for Operators of Systems Subject to Subpart L ? Options Include: – Procedures Established Under the SWTR – State Operator Certification Program Meeting EPA Guidelines – Others Stage 1 DBPR 167。 (h) ? (4) How the State Will Approve Parties to Conduct pH, Bromide, Alkalinity, and Residual Disinfectant Concentration Measurements ? Satisfied By: – The State’s Process for Similar Approvals Under the SWTR or – A Description of the Process That Demonstrates It Ensures the Measurements Are Reliable and Accurate – Should Include: ? Training Requirements ? Laboratory Facilities (If and When Necessary) ? Certification As Qualified Operator ? Under Supervision of a Qualified Operator Stage 1 DBPR 167。 Reporting and Recordkeeping – DBPP ? Softening Systems Monitoring for DBPP Monthly or Quarterly and Meeting Alternative Compliance Criterion – Criterion Used – Number of Paired Samples of Last Quarter – Location, Date, and Result of Each ? Paired Sample ? Alkalinity – For Softening Systems Removing at Least 10 mg/L Mg Hardness ? The Running Annual Average of Mg Hardness Removal – Whether the System Is in Compliance Code of Federal Regulations Title 40 Part 142—NPDWR Implementation Subpart B—Primary Enforcement Responsibility ? 167。 Compliance – DBP Precursors ? Compliance Calculations Month Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. A Treated TOC (mg/L) B Source TOC (mg/L) C % removed (1A/B) x 100 44 34 29 D Source Water Alkalinity (mg/L) 70 75 85 E Required TOC Removal (%) 40 35 35 F C/E If average is ? , the PWS is in pliance ? (F) = 167。 Treatment Technique For DBPP ? Procedure for Step 2 Bench Scale Testing – Apparatus and Reagents ? Jar Test Apparatus ? pH Meter ? Stock Solution of Coagulant ? Stock Solution of Base ? Sample Bottles (Alkalinity and pH) ? Sample Bottles (TOC) ? Pipettes and Glassware Coagulant Dosage Equivalents Reagent Grade Alum (Aluminum Sulfate) Al2(SO4)3* 18 H2O (mg/L) 10 20 30 40 50 60 70 80 90 100 22 34 45 56 6 78 90 101 112 18 27 36 46 55 64 73 82 91 11 16 22 27 33 38 44 49 55 19 28 38 47 57 66 76 85 95 19 28 37 47 56 66 75 84 94 Regular Grade Alum (Aluminum Sulfate) Al2(SO4)3* 14 H2O (mg/L) Ferrous Sulfate FeSO4* 7 H2O (mg/L) Ferric Sulfate Fe2(SO4)3* 9 H2O (mg/L) Ferric Chloride FeCl3 (mg/L) Ferric Chloride FeCl3* 6 H2O (mg/L) 167。 Treatment Technique For DBPP ? To Achieve Compliance Systems Must Do One of the Following: – Meet One or More Alternative Compliance Criteria – Achieve Step 1 TOC Removal Requirements – Establish and Achieve Step 2 TOC Removal Requirements – Obtain a State Waiver of the Requirements 167。 Reporting and Recordkeeping – Disinfectant Residual ? Chlorine Dioxide – Dates, Results, and Locations During Last Quarter – Whether the MRDL Was Exceeded – Whether the MRDL Was Exceeded in Any 2 Consecutive Daily Samples and – Whether the Violation Was Acute or Nonacute 167。 Reporting and Recordkeeping 167。 Compliance – General ? Failure to Monitor Is Treated As a Violation for Entire 1 Year Period: – MCLs ? TTHM, HAA5, or Bromate ? Failure to Monitor Is Treated As a Violation for Entire 1 Year Peri