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

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 Terms  Process Water Requirements  S tormwat er Requirements  Administrative Process  Q&A 2

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 (*) 3

GENERAL PERMIT TERMS 4

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 5

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) 6

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 7

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 8

Termination Requirements  All permitted process water have ceased  All stormwater discharges have ceased because industrial activity has ceased – No significant materials or industrial products or activities remain exposed  DRMS Bond Release  In absence of DRMS bond, site has attained final stabilization 9

PROCES S WATER DIS CHARGES 10

Process Water: Permitted Outfalls 11

Process Water: Effluent Limitations and Monitoring  General Permit Requirements – Flow* – pH – Oil and Grease – Total Suspended Solids 12

Process Water: Effluent Limitations and Monitoring  S ite S pecific Requirements – Total Flow* – Electrical Conductivity (EC)* – Total Dissolved S olids – Total Recoverable Iron* – Total Phosphorus – BTEX – 303d List Impaired – Other potential S treams* pollutants – S elenium TMDL* – Antidegradation Review 13

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 14

Process Water: Effluent Limitations and Monitoring 15

Process Water: Total S uspended S olids Visual < than 5 mg/l 5-15 mg/l 15-30 mg/l > 45 mg/l 16

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 17

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 18

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 19

S TORMWATER DIS CHARGES 20

S tormwater: Permitted Outfalls Stormwater Stormwater 21

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 22

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 23

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 24

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 25

S tormwater: Visual Monitoring*  Quarterly  Represent ative  Visual assessment  Documentation  Corrective actions 26

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 27

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 28

S tormwater: Monitoring Exceptions*  Inactive and unstaffed sites  Completed and finally stabilized areas 29

S tormwater: Facility Inspections  Quarterly inspections with one annual runoff event*  S cope and documentation 30

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 31

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 32

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 33

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 34

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* 35

S tormwater Discharge Requirements  Monitoring* – Visual ― Site Specific ― Water Quality Standards – Benchmark – Exceptions*  Inspections – Exceptions*  Corrective Actions*  S tormwater Management Plan  Reporting and Record Keeping – Annual Report – DMRs as applicable* – S tormwater Management Plan records 36

ADMINIS TRATIVE PROCES S ES 37

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 38

Contacts 303.691.4021 Al Stafford 303.692.3392 Maura McGovern Web Page https:/ / www.colorado.gov/ pacific/ cdphe/ wqcd-sand-and- gravel-general-permit-renewal-meeting-notice QUESTIONS? 39