Coquitlam Dam Seismic Upgrade Project ... - BC Hydro

Introduction
DRAFT FINAL (APRIL 2004)
Introduction
Due to the fact that GVRD Watersheds supply drinking water for the Greater Vancouver Region,
certain procedures must be followed to ensure that imported fill materials and aggregates for use
in the Watersheds are free of contaminants and that source water quality will not be impacted by
the materials. These procedures form part of a multiple barrier system that is in place to protect
the quality of source water in the Watersheds.
The procedures would also apply to fill materials and aggregates for use both within and outside
Watershed drainage areas, but exclude virgin gravel banks located within the Watersheds.
The purpose of this document is to specify processing and testing procedures for fill materials
and aggregates imported for use into the Watersheds. The guiding principle of this document is
the importation and use of fill materials and aggregates that are contamination free. As well, the
document provides guidelines for field sampling and the number of samples to be collected
based on the estimated volume of fill materials and aggregates to be used, the appropriate types
of tests to be conducted on the collected samples, and interpretation of test data.
This document is comprised of five parts as follows:
• Part 1 – Definitions and References
• Part 2 – Materials Processing
• Part 3 – Materials Testing
• Part 4 – Reporting
• Part 5 – Tables
GREATER VANCOUVER REGIONAL DISTRICT
Processing and Testing Procedures for Fill Materials and Aggregates Imported into
GVRD Watersheds Page 1 of 18