CHARM - Chemical Hazard Assessment and Risk Management - User Guide Version 1.6

Oct 28, 2026

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User Guide Version 1.6 for CHARM (Chemical Hazard Assessment and Risk Management) describes how to implement the CHARM implementation network (CIN) for evaluating chemicals used and discharged offshore. The guide provides a revised framework for chemical hazard assessment and risk management, including updates to assessment factors and selection requirements for chronic NOEC and acute L(E)C50 values. It also documents revision history and clarifies sections and tables used in offshore chemical evaluation, including uncertainty and appendix content.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages77

Reading Time3 h 14 min

AccessFree to download

Executive Summary

1. Introduction

Revisions List

CHARM CHEMICAL HAZARD ASSESSMENT AND RISK MANAGEMENT For the use and discharge of chemicals used offshore User Guide Version 1.6 ⑥ CHARM IMPLEMENTATION NETWORK – CIN 2025 A CIN REVISED CHARM III REPORT 2004 A USER GUIDE FOR THE EVALUATION OF CHEMICALS USED AND DISCHARGED OFFSHORE VERSION 1.6 ⑥ Authors: M. Thatcher (Baker Hughes INTEQ/EOSCA), M. Robson (MAERSK Olie OG GAS AS/NSOC/D), L.R. Henriquez (State Supervision of Mines, the Netherlands), C.C. Karman (TNO, the Netherlands) and Graham Payne (Briar Technical Services/ EOSCA) 􀁥 N. Robinson (NIKAM Consulting/EOSCA) 􀁧 Date: 2017 Sponsors: Netherlands Oil & Gas Exploration and Production Association NOGEPA Netherlands Ministry of Economic Affairs (EZ) Netherlands Ministry of Housing, Spatial Planning and Environment (VROM) Netherlands Ministry of Transport, Public Works and Water Management (V&W) International Association of Oil & Gas Producers (IOGP) European Oilfield Speciality Chemicals Association (EOSCA) Revisions List 􀁥 | Version | Date | Description | Originator | Reviewed | Approved | | --- | --- | --- | --- | --- | --- | | 1.6 | 2025 | Amendments to Table 2 detailing assessment factors to be used, to capture the requirement for chronic NOEC values and acute L(E)C50 values to be used. This is detailed in Section 3.1.2 (1) PNECpelagic-Data selection, and has been added to Table 2 for clarity. | NR | CIN
group | CIN
group | | 1.5 | 2017 | Minor typos and nomenclature, update all references to Recommendations updated and some formulae corrected / clarified.
P8, use of half-life values derived from simulation tests. P12, Clarification added under Production Chemicals.
P13, redundant explanation of injection chemicals removed, and Drilling Muds categories reworded.
P14, sentence spacer and mixwater adjusted for clarity. P15, reference to HOCNF guidelines for all chemical functions added.
P19, paragraph on injection water reworded for transparency. P27, section on completion, workover, squeeze treatments reworded for clarity.
P34, note added to Box 6 to recognise PECsediment over estimation.
P35, Section 3.3 moved to Appendix, no longer relevant. P35-36, half-life thresholds added to acceptability criteria. P36, limitations of Batch Dilution Factors (BDFs) noted.
P37, limitation of PECsediment over estimation with Log Pow > 6 included.
P48, Statement after table on PLONOR chemicals removed. P53, noted that release factor of 0.33 is a minimum value. P58, amendments to wording for drilling chemicals and end note for clarity.
P65, specific gravity of mud moved to site specific data table. P70-71, note added that values in tables relate to bulk discharge not individual chemicals.
P73, note added that default values are for hazard assessment. P73-74,“used in Hazzard Assessment” added to table titles. P77, Appendix VIII added, relocating previous Section 3.3. Brackets added to Eqns: 2a, 2b, 3, 4, 5, 6. | NR | CIN
group | CIN
group | | 1.4 | 03/02/2005 | P18 Brackets added to equns 2b, 4 & 5 for clarity P25 Clarification of NOEC.
P29/71 Corrigendum to equation 26c
P38/46/69 Residual current speed added to Tables 5 & 6 P52/53 Chapter 5.1 moved to new chapter 6 on uncertainty analysis. Subsequent chapters renumbered
P72 Koc added to Appendix VII | GP | CIN
group | CIN
group | | Version | Date | Description | Originator | Reviewed | Approved | | --- | --- | --- | --- | --- | --- | | 1.3 | 31/01/2004 | NB Changes annotated 􀁦 in blue text Cover page added
P1 Version Number, Author list and footnote updated P2 Revision list included.
P5/7/34 Use of CHARM inapplicable for inorganics added. P5/8 Harmonised added to OSPAR pre-screening, changed wording re log BCF and threshold values.
P6/12/13/24/25/51/52/55/61 Squeeze & Hydrotest treatment details added.
P8 Introduction updated
P8/9 Reference Platforms explained P10 Scavengers added to list
P11/62 OBM changed to oil phase flui

FAQs

What is CHARM used for in offshore chemical evaluation?

CHARM provides a chemical hazard assessment and risk management framework for evaluating chemicals used and discharged offshore.

What key update is included in User Guide Version 1.6?

Version 1.6 adds amendments to assessment factors and clarifies requirements to capture chronic NOEC values and acute L(E)C50 values used in the evaluation process.

Where can the document’s change history be found?

The document includes a Revisions List that records version numbers, dates, descriptions of changes, and review/approval information.

Oct 28, 2026

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