DANSK DSF/ISO/DIS 11711-2 PDF

This document provides guidance to ballast water sampling teams or other concerned parties on the selection and use of sampling apparatus needed to collect and process ballast water discharge samples aboard a ship from sample ports installed in accordance with ISO 11711-1. It includes an overview of the sampling process, discussion on design and maintenance of sample probes, necessary sample flow rates, sample collection devices that incorporate sample flow control to maintain representative sampling conditions, and handling of samples for subsequent analyses. The purpose and required statistical confidence of measurements will dictate sample collection timing (e.g. beginning, middle, end of the discharge), duration (i.e. collection time), volume collected, and volume analysed. Thus, these measurement requirements must be defined by the sampling team for each sampling event; this document defines the necessary parameters but does not specify their values. Specifically, this document defines appropriate sample probe and sample flow control to achieve representative sampling and minimize measurement uncertainty consistent with measurement requirements. Appropriate sample volumes and collection times provide statistical confidence for viable organism counts at the discharge limit. Regulation D-2 requires the measurement of two organism size classes: ≥ 10 and < 50 μm (