Publication Summary

This is the quality assurance project plan for the South Fork Palouse River Pesticide, PCB, and Fecal Coliform Stormwater Pilot Study.

This Quality Assurance (QA) Project Plan describes a pilot project to estimate the municipal stormwater load of several 303(d) listed pollutants from Phase II stormwater systems in the South Fork Palouse River basin. Given the sparse population throughout much of the watershed, the entities discharging stormwater to the river will likely only include the city of Pullman and Washington State University discharges on the South Fork Palouse River (SFPR).

Grab samples will be taken for chlorinated pesticides, PCBs, and fecal coliform bacteria concentrations from three stormwater discharges. An attempt will be made to collect samples representing three storm events. Discharge measurements will be made at each sampling location during each storm event sampled. Results from this study may be used in the development of Total Maximum Daily Loads (TMDLs) for toxic compounds and fecal coliform bacteria in the SFPR.

This study will not only provide data for the TMDL development but also a foundation for development of a general Phase II stormwater loading approach for use in TMDLs.

Link to EIM data for User Study ID BRAW0001