Manual on Oil Pollution - Section VI: IMO Guidelines for Sampling and Identification of Oil Spills, 1998 Edition (I578E)

This section provides guidance on the techniques, equipment and strategies for sampling oil to identify unknown sources of spilled oil. Although references are given for the laboratory methods required for analysis, the emphasis in this text is on the details of the field work required to collect the samples.

The IMO Guidelines for Sampling and Identification of Oil Spills are intended to provide guidance to governments, including those of developing countries, on the techniques, equipment and strategies for sampling oil to identify unknown sources of spilled oil. Although references are given for the laboratory methods required for analysis, the emphasis in this text is on the details of the field work required to collect the samples.

The integrity of the samples at every point from collection through shipment and analysis is important. The foundation of any chemical analysis is sampling. Sampling correctly provides a representative portion of oil that is not contaminated by other products. Storage and shipment ensure that the sample will not deteriorate before it can be analysed. For oil spills in particular, the analytical process involves comparing the chemical characteristics, or ‘‘fingerprints’’, of the spilled oil and various suspected sources. Therefore, success in matching spills to sources depends on knowing locations where samples should be taken. The education of field samplers with the information in this publication will facilitate the identification of the sources of spilled oil.

This publication has been written to provide a comprehensive and detailed explanation of all aspects of the sampling process. These Guidelines, which deliberately include many different options that are currently in use, may be used in several ways. They can be provided directly to field personnel or used as a basis to prepare guidelines specifically for individual countries.

The draft of this document was developed by a working group formed of technical experts who attended the 1995 Oil Spill Research and Development Forum, which was held at IMO headquarters in London in May 1995. LCDR Kristy Plourde of the US Coast Guard Marine Safety Laboratory chaired the working group and prepared the draft, with active participation by experts from Australia, Bulgaria, the United Kingdom, Germany and Denmark.

Introduction

Definitions

Acronyms and abbreviations

Supplies and equipment

Safety

Planning ahead for sample collection

Sampling procedures

Sample identification and security

Storing the samples

10. Requesting laboratory analysis

11. Shipping samples to the laboratory

12. Choosing a laboratory

13. Laboratory analysis

Appendix A – Oil sampling and shipping checklist

Appendix B – Chain-of-custody record

Appendix C – Proper shipping names and UN numbers for petroleum products

Appendix D – Flashpoint ranges for typical petroleum products

Appendix E – ASTM and NORDTEST standards for analysis of waterborne oil spill samples