Excerpts of EPA Q&A Document

NPDES
Storm Water Program
Question and Answer Document
Volume 11
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iz�7EPA
U.S. Environmental Protection Agency _-----
Office of Wastewater Enforcement and Compliance
Permits Division
401 M Street, SW
Washington, DC 20460
July 1993
4

TABLE OF CONTENTS
Page
1. General Applicability ..................................... 1
II. Definition of Storm Water Discharge Associated With Industrial Activity. 6
Category (i): .......................................... 6
Category (iii): ........... ............................. 6
Category (iv): ......................................... 8
Category (v): ......................................... 8
Category (viii): ............ " ........................... 9
Category (x): ................:......................... 10
Category (xi): .................................... .... 14
III. individual Permits ........... .......................... 15
IV. EPA General Permits .................................... 17
V. Group Applications ................... ................. 26
VI. Sampling .......................................... 26
VII. Municipal Permit Applications .. ................. 29
VIII. The Intermodal Surface Transportation Efficiency Act of 1991
(Transportation Act) .......... 31
IX. 9th Circuit U.S. Court of Appeals Decision ..................... 32
X. Phase ll ............................................. 32
X1. List of Storm Water Contacts ............................... 35
XII. State NPDES Program Status ........................... . 53
XIII. Regulatory Definitions ............ .................:= :-. 54
XIV. Industrial Classification of Auxiliary Establishments ............... 56

Category (iv): Hazardous waste treatment -,--storage or disposal facilities.
20. If the primary SIC code of a facility is not covered under the regulations,
but there is a hazardous waste treatment, storage or disposal facility
(TSDF) on site, is the TSDF subject to storm water permitting
requirements?
A. Yes. If the hazardous waste TSDF is or should be operating under interim
status or a permit under Subtitle C of the Resource Conservation and
Recovery Act (RURA), regardless of -the facility's primary activity, the
storm water discharges from that portion of the site are subject to the
narrative definition of storm water discharges associated with industrial
activity under category (iv). Even if a facility's SIC code is not included in
the regulations, any activity.describ ed by one of the narrative categories of
"industrial activity" that is occurring on -the site would be regulated under
the storm water program SSG ca�`�°���%�' ,: (lt,J(�rr)(vr,? v,r,�(X,} 46cf,-122,26(6)(14)
Category (v): Landfills, land application sites and open dumps that receive
industrial waste.
21. At what point does an inactive, closed, or capped landfill cease being an
. industrial activity?
A. An inactive, closed or'capped landfill is no longer subject to storm water
permit application requirements when the permitting authority determines
the land use has been altered such that there is no exposure of significant
materials to storm water at the site. For example, if an impervious surface
(such as a parking lot or shopping center) now covers the closed landfill,
the permitting authority, could determine that storm water discharges from
the area are no longer associated with the previous landfill. activity. These
determinations must be made by the permitting authority on'a--Can-by-
case basis.
22. If construction of cells at a landfill disturbs greater than five acres of land;
is coverage under EPA's construction general permits required?
A. No. EPA considers construction of new cells to be routine landfill
operations that are covered by the landfill's industrial storm water general
permit. However, the storm water pollution. prevention plan for the landfill
must incorporate best management practices (BMPs) that address
sediment and erosion control. Where a new landfill is being constructed
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