Ecology finds Tigerfloc functionally equivalent to the flocculent chemicals identified in Best Management Practice C250 (Construction Stormwater Chemical Treatment) for stormwater management. Contractors may use Tigerfloc as a replacement for other approved chemicals such as ChitoSan Acetate when operating an enhanced sand filtration system on construction sites.

Ecology finds Track Clean™ Construction Entrance Plates can be used as a temporary erosion control mechanism. These plates must adhere to the guidelines of Best Management Practice C105 (Stabilized Construction Entrance) for stormwater control.

Letter showing Wet Sep functional equivalence.

Sections 210 & 310 Work Group Agenda - July 7, 2015

Definitions Work Group Notes - February 3, 2015

Letter that determined to be functionally equivalent to BMP C105: Stabilized Construction Entrance

Ecology finds the StrataCell and StrataVault systems are functionally equivalent to a bioretention facility when used for treating stormwater.

List of contractors and facilities providing oil and hazmat cleanup in Washington.

Checklist outlines the National Preparedness components to be demonstrated in oil spill drills, over a three year period of time.

Contains the instructions when you approved for seek credit for an oil spill drill held in other states.

Contains the instructions when you are approved to self-certify an oil spill drill, or provide documentation for incidents/unannounced drills.

Specific recommendations made to parties involved in oil spills

A composting guide aimed at homeowners.

Best management practices for composting and soil management.

An overview of guidance for local Solid Waste Advisory Committees

A document listing composting facilities in Washington, the types of materials they accept and the amount of material they processed in 2015.

This is a regularly updated list of tire carrier businesses in Washington.

This document covers 2018 litter recovery statistics for Washington's northwest region.

This document lists 2018 litter recovery statistics for Washington's southwest region.

This is a template authorization letter that organizations can use for outreach to retailers about participating in Washington's Secure Loads campaign to cut litter.