Field Approved Procedures and Technical Assistance Facilities with Ammonia and/or Fluoride Monitoring Requirements It is the responsibility of the permittee to ensure that monitoring is conducted according to test procedures approved under 40 CFR Part 136 even if the permittee does not operate the laboratory that performs the analytical testing on the waste stream. In terms of Ammonia Nitrogen and Fluoride monitoring, this means that the permittee must ensure that their effluent is appropriately characterized as to whether distillation is required. See the following Ammonia/Fluoride Distillation Policy and Ammonia/Fluoride Distillation Technical Assistance document. Approved Procedures for the Analysis of Field Parameters These documents are intended to provide the approved procedures and requirements for measurement of field parameters. You may refer to the approved method reference, instrument manufacturer's manual or other resources for additional information. Field Parameter Reference Method(s) Revision Total Residual Chlorine : DPD Colorimetric (no longer includes Hach 10014) SM 4500 Cl G-2011 and Hach 8167 10/2021 Total Residual Chlorine : DPD Colorimetric (Hach 10014) Hach 10014 10/2021 Total Residual Chlorine : Regular Level Amperometric Titration SM 4500 Cl D-2011 4/2021 Total Residual Chlorine: Low Level Amperometric Titration SM 4500 Cl E-2011 4/2021 Free Available Chlorine: DPD Colorimetric SM 4500 Cl G-2011 and Hach 8021 4/2021 Free Available Chlorine: Regular Level Amperometric Titration SM 4500 Cl D-2011 4/2021 pH SM 4500 H+B-2011 4/2021 Dissolved Oxygen SM 4500 O G-2011, Hach 10360, In Situ 1002-8-2009, ASTM D888-09 (B) and (C) 4/2020 Temperature SM 2550 B-2010 3/2021 Specific Conductance SM 2510 B-2011 4/2021 Settleable Residue SM 2540 F-2011 3/2021 Turbidity SM 2130 B-2011 4/2021 Salinity SM 2520 B-2011 4/2021 VAR Option 5: Aerobic Processes at Greater than 40°C VAR Option 5 3/2021 VAR Option 6: Addition of Alkali VAR Option 6 3/2021 VAR Option 12: Raising the pH of Domestic Septage VAR Option 12 3/2021 SOP Templates *Check back often for new templates* These templates are provided to assist Field Laboratories in fulfilling the requirement of having an SOP for each Certified parameter. If choosing to use a template, they are to be filled out with each facility's specific information where applicable. Field Parameter Method Total Residual Chlorine - DPD colorimetric SM 4500 Cl G-2011 Total Residual Chlorine - DPD colorimetric, ultra low level Hach 10014 Total Residual Chlorine SM 4500 Cl D-2011 Total Residual Chlorine - low level amperometric titration SM 4500 Cl E-2011 Free Available Chlorine SM 4500 Cl G-2011 pH SM 4500 H+B-2011 pH SW-846 9040C pH SW-846 9045D Dissolved Oxygen : Membrane Electrode SM 4500 O G-2011 Dissolved Oxygen : LDO Hach 10360, ASTM D 888-09 C Temperature SM 2550 B-2010 Specific Conductance SM 2510 B-2011 Settleable Residue SM 2540 F-2011 Turbidity SM 2130 B-2011 Salinity SM 2520 B-2011 VAR Option 5: Aerobic Processes at Greater than 40°C VAR Option 5 VAR Option 6: Addition of Alkali VAR Option 6 VAR Option 12: Raising the pH of Domestic Septage VAR Option 12 Policies Policies are regarded as required quality assurance practices and are meant to clarify existing legislative rules or to provide guidance where a legislative rule does not exist. They are intended to insure data produced is accurate, reliable and documented appropriately. Policies applicable to certified laboratories are found on this page of the Laboratory certification website. Policies with an asterisk ( * ) next to the title are applicable to Field Laboratory certification, depending on the Parameter Methods the Field Laboratory is certified for. Tools for Field Laboratories Item Revision Date Description Example Benchsheet for Field Analyses 07/08/2019 An example of a worksheet used to record the information used to generate field testing results. Fixed Pipettor Calibration Worksheet 05/21/2009 An Excel® spreadsheet for use when calibrating fixed-volume mechanical volumetric liquid-dispensing devices. Adjustable Pipettor Calibration Worksheet 05/21/2009 An Excel® spreadsheet for use when calibrating adjustable volume mechanical liquid-dispensing devices. Total Hardness (mg/L CaCO3) Calculator 06/16/2010 An Excel® spreadsheet for calculating Total Hardness (mg/L as CaCO3) using the Calcium and Magnesium values reported by your certified contract laboratory. Free Available Chlorine (FAC) Curve Calculator 2/12/2020 An Excel® spreadsheet for calculating the percent recoveries of standards used to verify the instrument calibration. The worksheet may also be used to document the process and satisfy record retention requirements. Total Residual Chlorine (TRC) Curve Verification Calculator Low Level Regular Level 2/12/2020 An Excel® spreadsheet for calculating the percent recoveries of standards used to verify the factory-set instrument calibration. The worksheet may also be used to document the process and satisfy record retention requirements. TRC User-Generated Curve Calculator Low Level 2/12/2020 An Excel® spreadsheet for calculating the correlation coefficient and percent recoveries of standards used for instrument calibration with a user-generated curve. The worksheet may also be used to document the process and satisfy record retention requirements. Guidance for Field Laboratories Item Revision Date Description NC Climate Office Website n/a Link to a database of weather stations throughout North Carolina. LDO Daily Calibration Verification 6/16/2009 A document describing the procedure for verifying the calibration of Luminescence Dissolved Oxygen (LDO) meters with solubility table. Pipettor Calibration Procedure 7/30/2009 An example gravimetric procedure for determining the measurement error of mechanical liquid-dispensing devices. Total Residual Chlorine Instrument Sensitivity Letter 8/14/2001 A letter from the NC DWQ Point Source Branch Supervisor to NPDES Permittees requiring the use of instruments that will detect levels below permit discharge requirements. Total Residual Chlorine Compliance Limit Memo 5/01/2008 A memo from the NC DWQ Point Source Branch Supervisor to NPDES Permittees regarding the TRC Compliance Limit of 50 µg/L. Total Residual Chlorine Detection and Compliance Level Letter 3/11/2015 A letter from the NC WW/GW Laboratory Certification program restating the Division's policies for Total Residual Chlorine Detection and Compliance Levels. Stormwater Permitting Letter on Field Lab Certification Requirements 2/14/2008 Only facilities classified in accordance with Classification of Water Pollution Control Systems Rules found in 15A NCAC 08G .0300 must be certified, however, monitoring of discharges under an NPDES permit (including stormwater) must be conducted in accordance with 40 CFR Part 136. Corrective Action Response to Audit Findings Guidance 3/4/2020 A document describing the corrective action response and documentation needed for labs to address Findings from audits. Corrective Action Response (CAR) example 11/07/2016 This document provides guidance on root cause analysis and corrective action response and includes an example of a CAR form (this form is not required) ``````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` DMR Guidance Links Link to National Pollution Discharge Elimination System (NPDES) Permitting Guidance and Directions for Completing a Discharge Monitoring Report (DMR). Look under Compliance Forms. You can also find a link to the Significant Figures and Their Use on DMRs document and list of Parameter Codes.[NOTE: The parameter code for any Fecal coliform regardless of technology (e.g., Colilert-18, MF, MPN/100 mL, etc.) code is now 31616] DMR Units of Measure Descriptions - 2015 DMR Sample Type Code Descriptions - 2015 If you see something that should be corrected or have any questions about the content of the site, contact the site administrator; or (919) 733- 3908 x259.