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  Investigation of Inappropriate Pollutant Entries Into Storm Drainage Systems: A User's Guide (EPA/600/R-92/238) January 1993

This user's guide is the result of a series of EPA-sponsored research tasks. The purpose of the tasks was to develop a procedure to investigate nonstorm water entries into storm drainage systems.

A number of past projects have found that dry-weather flows discharging from storm drainage systems can contribute significant pollutant loadings to receiving waters. If these loadings are ignored (e.g., by only considering wet-weather storm water runoff), little improvement in receiving water conditions may occur with many storm water control programs.

These dry-weather flows may originate from many sources, the most important of which may include sanitary wastewater or industrial and commercial pollutant entries, failing septic tank systems, and vehicle maintenance activities. After identification of the outfalls that contain polluted dry-weather flows, additional survey activities are needed to locate and correct the nonstorm water entries into the storm drainage systems.

This guide helps users identify the types and magnitude of nonstorm water entries.


Richard Field

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