Minimal Industrial Discharge
Obtaining the Permit (State)& Letter of Authorization (City)
General Information about the "Letter of Authorization"
Wastewater from minimual discharge industrial operations that does not contain soaps, chemicals or pollutants may be discharged to the storm sewer only if:
- The wastes are generated from only from the listed operations and the discharger maintains a current permit from the State of Colorado, and
- Written permission is obtained from the City of Longmont (303-651-8399 or 303-651-8667); and
- The wastewater meets all requirements of Chapter 14.26 of the Municipal Code (storm drainage system) including Prohibitions and Exemptions (14.26.500); and
- All Best Management Practices outlined in the State permit are met.
APPLICATION PROCESS TO OBTAIN LETTER OF AUTHORIZATION
- Complete an application (pdf). You must fill it out, sign and print. If you cannot download this pdf, call 303-651-8667 to obtain hard copy or electronic copy (specify pdf or doc). Do not leave any blanks; use "not applicable". There are no application fees at this time. Submit completed form with original signatures to:
Storm Water Quality Program- WWTP
501 East 1st Avenue
Longmont, CO 80501
Copies, faxes and electronic versions are not accepted.
- Upon approval, the City will provide a letter of authorization. The permission expires in 90 days or when the State Permit expires, whichever comes first.
- To renew the permission, the applicant must submit a renewal application (pdf) to the above address.
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CDPHE Permit Applicable to Discharges from:
Contact the CDPHE at 303-692-3500 as the criteria is currently being re-evaluated.
IS THE STATE PERMIT NEEDED?
The State permit is required only if the wastes can enter the state waters directly or via a storm drainage system. If the water is discharged to the landscaping and can in no way enter the storm drain or State waters (that is, it evaporates), the discharge is not considered a "point source" and a permit is not required.
Snow removed from fueling pad and parking lot contained oil/fuel. It was piled in this location.
The snow melted and the oily wastes soaked into the ground and entered retention pond on site.
Wastes had potential to leave site = "threatened discharge".
ILLEGAL VS THREATENED DISCHARGES
A "threatened discharge" is defined by the Longmont Municipal Code as any discharge of contaminants that could leave the site. (An "illegal discharge" is one that actually leaves the site.) Therefore, any discharge of wastes to landscape that contains contaminants is a violation of the Municipal Code. These have the potential to leave the site during the next rain storm. The State process indicates that you do not need a permit for discharges that don't enter the storm drain, but fails to inform you of the potential violations if the wastes contains any contaminants.
BEST OPTIONS FOR CONTRACTS IN THE CITY OF LONGMONT
Collect the wastes and discharge them to the sanitary sewer on-site. Contact the IP Program at 303-651-8667.
- There are no local fees for this discharge (unless the wastes is of higher pollutant strenth than domestic wastes).
- There are no local applications or permits; no expiration dates to worry about. The only requirement is that the discharge meets the general and specific prohibitions of the Municipal Code. Letters of permission are available, but not required.
- There is no requirement for expensive and confusing State permits. However, there is the expense for additional equipment to collect the wastes.
- It is the environmentally friendly option.
- With no discharges to the environment, you won't have to deal with citizen inquiries or concerns about illegal or threatened discharges.
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This page was updated
January 4, 2012
City of Longmont Public Works & Natural Resources
Stormwater Quality Program
Pollution Prevention Program