Colorado S and and Gravel Mining Discharge Permit February 7, 2017 - - PowerPoint PPT Presentation

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Colorado S and and Gravel Mining Discharge Permit February 7, 2017 - - PowerPoint PPT Presentation

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Colorado S and and Gravel Mining Discharge Permit February 7, 2017 Grand Junction, CO Agenda Webpage: https:/ / www.colorado.gov/ pacific/ cdphe/ wqcd-sand- and-gravel-general-permit-renewal-meeting-notice Renewal Process General

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Colorado S and and Gravel Mining Discharge Permit

February 7, 2017 Grand Junction, CO

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Agenda

  • Webpage:

https:/ / www.colorado.gov/ pacific/ cdphe/ wqcd-sand- and-gravel-general-permit-renewal-meeting-notice

  • Renewal Process
  • General Terms
  • Process Water Requirements
  • S

tormwat er Requirements

  • Administrative Process
  • Q&A

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SLIDE 3

Permit renewal process

  • COG500000 renewal effective on 1/ 1/ 2017

– All process water certs renewed – Stormwater only certs currently being renewed – Adhere to currently issued certification

  • For this presentation, changes from

previous permit(s) are indicated with an asterisk (*)

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GENERAL PERMIT TERMS

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Authorized Discharges

  • S

IC Code 14

  • Activities that occur at a mine facility
  • Asphalt and concrete batch plants

– Stormwater only

  • Asphalt and concrete recycling

– Stormwater only

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Limitations on Coverage

  • Discharges from:

– Construction activity ≥ one acre – Process water from asphalt batch plants – Process water from concrete batch plants

  • No concrete washout discharge to surface water
  • Including drum and truck wash and wet scrubber*

– Placer mining* – Discharge to outstanding waters – Discharges covered by Low Risk Guidance Document – Other non-authorized discharges (landfill, etc)

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Process Water

  • Mine dewatering

− Runoff and/ or groundwater that is impounded or collects in

the mine and is pumped, drained, or otherwise removed through the efforts of the mine operator

− For construction sand and gravel and industrial sand facilities,

includes wet pit overflow

  • Process generated wastewater

− e.g. transport slurry

  • Water used in processing

− Screening, washing, crushing, etc.

  • S

tormwater that commingles with process water

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S tormwater

  • Plant yards, material handling, storage areas

and stockpiles

  • All disturbed areas

− Including outslopes

  • S

tormwater run-on

  • Immediate access roads and rail lines

− Raw materials, manufactured product, waste materials,

by products used or created by the facility

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Termination Requirements

  • All permitted process water have ceased
  • All stormwater discharges have ceased

because industrial activity has ceased

– No significant materials or industrial products

  • r activities remain exposed
  • DRMS

Bond Release

  • In absence of DRMS

bond, site has attained final stabilization

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PROCES S WATER DIS CHARGES

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Process Water: Permitted Outfalls

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Process Water: Effluent Limitations and Monitoring

  • General Permit Requirements

– Flow* – pH – Oil and Grease – Total Suspended Solids

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Process Water: Effluent Limitations and Monitoring

  • S

ite S pecific Requirements

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– Total Flow* – Total Dissolved S

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– Total Phosphorus – 303d List Impaired

S treams*

– S

elenium TMDL*

– Electrical Conductivity

(EC)*

– Total Recoverable Iron* – BTEX – Other potential

pollutants

– Antidegradation Review

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Process Water:

Flow Limits and Monitoring Requirements

  • 30 day average flow limit*
  • Daily maximum flow monitoring
  • Total Quarterly or Monthly Flow*

– More accurate loading calculations

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Process Water: Effluent Limitations and Monitoring

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Process Water: Total S uspended S

  • lids Visual

< than 5 mg/l 5-15 mg/l 15-30 mg/l > 45 mg/l

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Process Water: Compliance S chedules

  • Implemented for new standards, revised

standards that have become more stringent, and new interpret ations of existing standards

– As necessary and appropriat e – Selenium, other limited parameters, flow

  • Contain annual or more frequent milestones

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Process Water: Flow Compliance S chedule

  • S

ubmit annual progress reports summarizing the progress to meet the new limit

  • Complete appropriate actions, which will

allow the permittee to meet the final limitations

  • Alternatively, permittee can submit a

modification request providing a flow they have demonstrat ed they can meet

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Process Water Discharge Requirements

  • 1. Discharge Monitoring and Limitations

– May include a compliance schedule

  • 2. Reporting and Record Keeping

– DMRs (quarterly or monthly) – Noncompliance, Bypass, Upset – Compliance schedule requirements

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S TORMWATER DIS CHARGES

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S tormwater: Permitted Outfalls

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Stormwater Stormwater

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S tormwater: Practice Based Effluent Limitations

  • Minimize exposure*
  • Good housekeeping

– Including spilled cement

  • Maintenance of control measures
  • S

pill prevention and response procedures

  • Erosion and sediment controls

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S tormwater: Practice Based Effluent Limitations (cont.)

  • Management of runoff and pollutant

removal*

  • S

alt storage piles or piles containing salt*

  • Employee training
  • Non stormwater discharges
  • Waste, garbage, and floatable debris*
  • Dust generation and vehicle tracking

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S tormwater: Water Quality Based Effluent Limitations

  • Discharges must be controlled as

necessary to meet applicable water quality standards

  • Division expects compliance with other

permit terms and conditions will control discharges as necessary

  • Division can require site specific terms and

conditions in the certification

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S tormwater: Control Measures*

  • Any BMP or other method (including

effluent limitations) used to prevent or reduce the discharge of pollutants

  • Must be selected, designed, installed,

implemented, and maintained in accordance with good engineering, hydrologic, and pollution control practices

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S tormwater: Visual Monitoring*

  • Quarterly
  • Represent ative
  • Visual assessment
  • Documentation
  • Corrective actions

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S tormwater: Benchmark Monitoring*

  • S

ector specific

– Asphalt and concrete batch plants

  • Not a limitation
  • Triggers corrective action

– Failure to complete corrective action is a

violation of the permit

  • Quarterly

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S tormwater: Water Quality S tandards Monitoring*

  • Required as necessary to determine

compliance with other terms and conditions to meet water quality standards

– Impaired Waters – Threatened and Endangered Species

  • Quarterly

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S tormwater: Monitoring Exceptions*

  • Inactive and unstaffed sites
  • Completed and finally stabilized areas

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S tormwater: Facility Inspections

  • Quarterly inspections with one annual

runoff event*

  • S

cope and documentation

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S tormwater: Facility Inspection Exemptions*

  • Inactive and Unstaffed S

ites

– Maintain no exposure

  • Two inspections annually (spring and fall)
  • No runoff event requirement

– DO NOT maintain no exposure

  • S

ix inspections annually

  • No runoff event requirement
  • Completed and Finally S

tabilized Areas

– No runoff event requirement

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S tormwater: Corrective Actions*

  • Follow up to findings during inspections

– Or if average of quarterly sampling exceeds

applicable benchmarks

  • Documentation

– Within five days of discovery

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S tormwater: S WMP Requirements

  • S

tormwat er Management Plan administ rator

  • Facility description
  • Facility map
  • Inventory of facility activities and

equipment

  • Inventory of materials
  • Assessment of potential pollutant sources

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S tormwater: S WMP Requirements

  • Description of control measures

– Installation and implementation specifications – Maintenance and associated documents

  • Additional control measure requirements

– Good Housekeeping – Preventative maintenance* – Spill prevention and response procedures – Employee training* – Non-stormwater discharges

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S tormwater: S WMP Requirements

  • Inspection procedures and document ation*
  • Monitoring procedures and document ation*
  • Corrective actions documentation*
  • Additional for Concrete Batch Plants

– Drainage area site map requirements – Description of measures to ensure that process

waste water resulting from washing trucks, mixers, transport buckets, or other equipment is not discharged to surface water*

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S tormwater Discharge Requirements

  • Monitoring*

– Visual ― Site Specific – Benchmark ― Water Quality Standards – Exceptions*

  • Inspections

– Exceptions*

  • Corrective Actions*
  • S

tormwater Management Plan

  • Reporting and Record Keeping

– Annual Report – DMRs as applicable* – S

tormwater Management Plan records

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ADMINIS TRATIVE PROCES S ES

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Administrative Processes

  • Submit a complete and signed permit application 60

days prior to discharge

– For stormwater discharges, must develop a Stormwater

Management Plan

  • Receive Permit Certification & general permit
  • Submit Forms

– Change of Contact – Modification Application – Transfer Application – Termination Application

  • Annual Fees

– Process water or both: $270 – Stormwater only discharges: $75

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QUESTIONS?

Contacts Al Stafford 303.691.4021 Maura McGovern 303.692.3392 Web Page https:/ / www.colorado.gov/ pacific/ cdphe/ wqcd-sand-and- gravel-general-permit-renewal-meeting-notice

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