Storm Water Pollution Prevention Plan (SWPPP) Approved By: Eric St Pierre, GM

Transcription

1 Page 1 of 41 STORM WATER POLLUTION PREVENTION PLAN Idaho Concrete Company (ICCO) Location (By Mapping Software): Heron River Pit , S Seneca Springs Way T4N R1W S17 Boise Meridian Star, Idaho Ada County Not Indian Country Emergency Contact: Bill Montgomery Work Phone: Title: Site Manager Emergency Phone: Fax: wmontgomery@idahoconcrete.com Secondary Contact: Juston Ekart Work Phone: Title: Operations Manager Emergency Phone: Fax: Type of Manufacturer: Sand & Gravel Primary SIC / NAICS Code: 1442, Permit Number: IDR05Cxxx jekart@idahoconcrete.com

2 Page 2 of Table of Contents Introduction Pollution Prevention Team Site Description Potential Pollutant Source Summary Activity Pollutants Spills and Leaks Non-Storm Water Discharge Evaluation Salt Storage Prior Sampling Data Storm Water Controls Technology and Water Quality Based Effluent Limit Controls Schedules and Procedures Effluent Limit Control Measures Monitoring and Inspections Corrective Actions Additional Documentation under Other Federal Laws Endangered Species Historic Places NEPA review Plan Certification SWPPP Maintenance and Modifications Availability Documentation Requirements Additional Documentation NOI / Permit Tracking Documents MSGP Employee Training Records Control Measure Maintenance & Repair Records Monthly Inspection Reports Quarterly Monitoring Report Annual Comprehensive Inspection Report Schedule Deviations Corrective Action Reports Benchmark Monitoring Exceedances Background Pollutants Monitoring Results Background Pollutants Monitoring Results Activity Status SWPPP Amendment Log

3 INTRODUCTION Page 3 of 41 This has been prepared to obtain authorization to discharge storm water associated with industrial activity under the 2008 Multi Sector General Permit IDR Development, implementation and maintenance of this SWPPP will provide Idaho Concrete the framework to reduce the potential for industrial pollutants leaving the property in the form of storm water runoff. This SWPPP will: Describe the characteristics of the site and the type of industrial activity Illustrate the site plan for the facility. Describe the practices that will be implemented to minimize the release of pollutants in storm water. Describe the practices that will be implemented to protect endangered species and historic places. List the monitoring and reporting requirements as applicable to the sector The SWPPP has been numbered and designed after the requirements published in the Multi-Sector General Permit for Industrial Stormwater Discharges under the National Pollutant Discharge Elimination System effective in Idaho on February 26, This SWPPP will remain effective until conditions require modification, or September 29, The July 2009 EPA Ready Mixed Concrete, Sand and Gravel Industrial Stormwater Pollution Prevention Plan Template and the Industrial Stormwater Fact Sheets for Sector E and Sector J were reviewed during the preparation of this SWPPP.

4 5.1.0 FACILITY OWNER / OPERATOR Staker Parson Companies dba Idaho Concrete Company Attn: Eric St Pierre P.O. Box 789 Eagle, Idaho estpierre@idahoconcrete.com POLLUTION PREVENTION TEAM MEMBER ROSTER Coordinator: Patrick Clark Title: Environmental Advisor Office Phone: (801) Emergency Phone: (801) pclark@stakerparson.com Page 4 of 41 Responsibilities: Coordinate SWP3 development, review required reporting, act as lead inspector for initial and annual comprehensive site assessments, complete endangered species and historic places assessments, update pollution prevention plan as required. Primary contact for SWPPP questions. Team Leader: Bill Montgomery Title: Site Manager Office Phone: (208) Emergency Phone: (208) wmontgomery@idahoconcrete.com Responsibilities: Oversee good housekeeping efforts, coordinate daily site activities to comply with the requirements listed in this plan, perform monthly inspections, quarterly benchmark and twice-annual effluent limit sampling as appropriate, observe for abnormal conditions, act as spill response coordinator, participate in initial and annual comprehensive site assessments, and ensure that changes to the site or the plan are reported to the Coordinator. Team Member: Juston Ekart Title: Operation Manager Office Phone: Emergency Phone: jekart@idahoconcrete.com Responsibilities: Support Team Leader in promoting good housekeeping and providing manpower and equipment necessary to implement and maintain storm

5 Page 5 of 41 water pollution prevention activities as outlined in this plan. Ensure required reporting is submitted, coordinate employee training Each member of the pollution prevention team will have access to this SWPPP in either an electronic or hard copy format. The electronic copy of this document is available on Sharepoint at under the Environmental Documents / Stormwater Permits section SITE DESCRIPTION Industrial Activities: This site includes construction sand and gravel operation that is part of a residential subdivision project. Aggregates produced at the site may be used to bring the subdivision up to grade, or may be shipped off site to other projects. The construction of the subdivision is permitted separately under IDR 12BL20. As materials from this source may supply projects other than the subdivision, a separate MSGP has been obtained. Process waters generated at this site include uncontaminated groundwater mine dewatering, a permitted process water discharge subject to effluent limitations under Sector J. Other process waters include aggregate washing effluent and equipment washing effluent. These process waters are segregated from storm water runoff, and are not discharged from the site. This facility is covered under SIC codes This site is located due north of Highway 44, a major transportation route in an urban / industrial area of Star, Idaho. Acres exposed to stormwater runoff: Permeable 41.5 Impermeable <1 Ponds 23.5 The receiving water would be an unnamed irrigation ditch, a tributary to the Boise River segment ID SW001-06, an impaired water for nutrients and temperature. TMDL s have been established for bacteria and total suspended solids. There are no MS4 s receiving runoff from the site

6 Revision No: 0 Page 6 of 41 General Location Map Receiving Water: Unnamed Canal

7 5.1.3 SUMMARY OF POTENTIAL POLLUTANT SOURCES Page 7 of Activities or sources that may contribute to storm water pollution at this site are listed below: Aggregate Processing: Aggregates may be crushed / screened / washed near the central part of the property using transient portable equipment. The mechanical crushing process reduced the native material to a useable size, and the screening process segregates the sized aggregates into piles. The crushing and screening processes create or liberate fine particles that can become a storm water pollutant through direct deposit to the ground, as a stockpile component, or through deposition from fugitive airborne dust. Activities that may contribute to storm water pollution under Aggregate Processing include fugitive dust generation, handling of aggregate materials, operation and maintenance of petroleum powered and lubricated heavy equipment, and generation of nonstorm water effluent. Chemical toilets may be present as part of this activity. Aggregate Storage: Crushed, screened and washed aggregates are stored around the aggregate plant and in stockpile areas. Fine aggregate particles and colloidals occurring naturally in the parent deposit or generated during the processing phase may be present in the stockpiled material. The stockpiles are loaded onto trucks for transportation off site or are used as on site fill to bring the subdivision project to grade. The stockpiles may be watered for fugitive dust control or temperature and moisture regulation, resulting in the generation of non-storm water effluent. Activities that may contribute to storm water pollution under Aggregate Storage include fugitive dust generation, handling of aggregate materials, operation and maintenance of petroleum powered and lubricated heavy equipment, and generation of non-storm water effluent. Chemical toilets may be present as part of this activity. Fuel Storage: Fueling of equipment is performed by off-site mobile service trucks. Activities that may contribute to storm water pollution under the Fuel Storage operation include spills resulting from handling of bulk petroleum products, leaks due to bulk petroleum storage and removal of storm water from secondary containment structures The following list summarizes the potential pollutants from each activity or source listed above:

8 Page 8 of 41 Aggregate Processing and Storage: Suspended solids resulting from entrainment of particles native to the parent materials or created during the processing operations are the primary pollutant of concern from mine construction, aggregate extraction, processing, storage and reclamation activities. Other potential contaminants of concern are nitrate / nitrite from groundwater discharge, alkalinity from the parent material, and oil & grease from heavy equipment operation. Floatable pollutants including trash and debris may result from inadequate trash control and housekeeping procedures incidental to the mining activity. The following is a list of significant materials that may be exposed to stormwater: Topsoil / Overburden (TSS, ph) Sand & Gravel (TSS, ph) Process water from aggregate washing / equipment maintenance (TSS, ph, oil & grease) Diesel fuel tanks (oil & grease) Lubricating oil tanks / drums (oil & grease) Used lubricating oil tanks / drums (oil & grease) Grease drums (oil & grease) Used grease drums (oil & grease) Gasoline tanks (oil & grease) Spare machinery parts (oil & grease) Metals for fabrication (oil & grease) Scrap metals (oil & grease) Garbage / Trash (floatable solids) Chemical toilets (ph, floatable solids) Fuel Handling: Petroleum spills including gasoline and diesel fuel (oil & grease) are the primary pollutant of concern from the fuel storage area. Floatable pollutants including trash and debris may result from inadequate trash control and housekeeping procedures incidental to the fueling operation Significant / Reportable Quantity Spills & Leaks There have not been any Significant or Reportable Quantity (Oil discharge (film/sheen/discoloration) to water surface, or shoreline, or violation of water quality standards, or discharge of CERCLA hazardous substance equal to or above RQ) releases at his location in the last three years. All containers susceptible to spillage (oils, cleaning chemicals, fuels, other potential stormwater pollutants) will be kept closed and labeled. Secondary containment will be provided for containers where a leak could result in discharge

9 Page 9 of 41 of the product to an outfall. The Team Lead and Plan Coordinator will be notified immediately in the event of a release that threatens water quality. The Plan Coordinator will perform any necessary notifications to local, state and federal agencies Non Storm Water Discharge Elimination Evaluation: The following non-storm water effluents are generated at this site: Source Date Outfall Evaluation Control Aggregate Equipment washing 3/27/13 OF1 Visual observation Berming to segregate process water from storm water no discharge Equipment Washing 3/27/13 OF1 Visual observation Berming to segregate process water from storm water no discharge Pavement Wash Waters / Dust Control 3/27/13 OF1 Visual observation No detergents used in process, no toxic substances washed off road. This is an allowed nonstorm water discharge. Mine Dewatering 3/27/13 OF1 Visual observation Groundwater is not comingled with other process waters or contaminants There is no salt storage at this facility: Sampling Data Sampling data is maintained with this plan in Section , and submitted to DEQ and EPA Storm Water Controls Technology Based and Water Quality Based Effluent Limit Controls The following stormwater control measures have been implemented to meet the non-numeric effluent limits identified in Section of the MSGP: A. Minimizing Exposure: The following materials will be kept covered to reduce their exposure to rain, snow, snowmelt or runoff: Petroleum handling is conducted to minimize spills by attending all transfers. All spills will be promptly cleaned up to minimize exposure to stormwater. B. Good Housekeeping: all exposed areas of the facility that may contribute to storm water pollution will be kept in a clean, orderly fashion. These areas include

10 Page 10 of 41 the fueling area, the aggregate stockpile / processing area and the mining area. These areas will be inspected on a monthly basis for spills, leaks, accumulated garbage and other problems that may contribute to storm water pollution. Dumpsters are emptied weekly. The monthly inspections will be documented on the inspection form (Section 5.5.5). C. Preventative Maintenance: All structural storm water management devices must be inspected and maintained to avoid breakdowns or failures that may result in discharges to surface waters. The berms surrounding the process water ponds, the mining area will be maintained as necessary to prevent the release of non-permitted process water (anything other than mine dewatering and clean pavement wash water) to any mining area or storm water conveyance. When mine dewatering occurs, the settling ponds and outfalls will be inspected prior to discharge of mine dewatering effluent and monthly during discharges. The process water basins will be monitored monthly for sedimentation. Sediment will be removed as necessary to prevent the process water containment basins from overtopping into storm water conveyances or mining areas. D. Spill Prevention and Response Procedures: Products susceptible to releases will be stored in labeled containers. All spills over 5 gallons will be reported to the Pollution Prevention Team Leader, as well as the corporate environmental manager. Spills that meet the national RQ reporting criteria will be reported by the corporate environmental manager. E. Sediment and Erosion Control: The aggregate stockpile areas have a potential for sediment-laden storm runoff. Stockpile areas drain to settling ponds prior to discharge. F. Runoff Management: Stormwater is routed to the main dewatering pond, then to the settling pond prior to discharge off site. G. Salt Storage: Salt is not stored at this site. H. Sector Specific Non-Numeric Technology Based Effluent Limits: The following Sector Specific Requirements for Construction Sand & Gravel operations are identified in Section 8.J.4 of the MSGP: Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities: Clearing, grading, and excavation activities being conducted as part of the exploration and construction phase of mining activities are covered under this permit.

11 Page 11 of 41 a. For all areas affected by clearing, grading, and excavation activities, control measures will be selected, designed, installed, and implemented that meet applicable Part 2 effluent limits. The current control for this activity is the large settling pond prior to the outfall. Prior sampling indicates that this control is effective. b. Litter, debris, and chemicals must be prevented from becoming a pollutant source in stormwater discharges. c. The drainage area to the discharge settling pond is 41 acres, requiring a storage capacity of 147,600 cubic feet. The mine ponds are 23.5 acres in size, with an average depth of 5 feet resulting in a capacity of over 5.1 million cubic feet. The settling pond capacity exceeds the design requirement. d. Inspections must be conducted either at least once every 7 calendar days or at least once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater during clearing and grading activities. Inspection frequency may be reduced to at least once every month if the entire site is temporarily stabilized, if runoff is unlikely due to winter conditions (e.g., site is covered with snow, ice, or the ground is frozen), or construction is occurring during seasonal arid periods in arid areas and semi-arid areas. e. Inspections must include all areas of the site disturbed by clearing, grading, and/or excavation activities and areas used for storage of materials that are exposed to precipitation. Sedimentation and erosion control measures implemented must be observed to ensure proper operation. The outfall OF1 must be inspected to ascertain whether erosion control measures are effective in preventing significant impacts to waters of the United States. Locations where vehicles enter or exit the disturbed area must be inspected for evidence of significant off-site sediment tracking. f. For each inspection as required above, an inspection form will be completed and kept with this plan. g. Inspections and maintenance of control measures, including any BMPs, associated with clearing, grading, and/or excavation activities being conducted as part of the exploration and construction phase of a mining operation must continue until final stabilization commencement of the active mining phase for those areas that have been temporarily stabilized as a precursor to mining. h. Stabilization measures should be initiated immediately in portions of the site where clearing, grading and/or excavation activities have temporarily ceased, but in no case more than 14 days after the clearing, grading and/or excavation

12 Page 12 of 41 activities in that portion of the site have temporarily ceased. If snow or freezing conditions occur where initiating perennial vegetative stabilization measures is not possible within 14 days after mining, exploration, and/or construction activity has temporarily ceased, temporary vegetative stabilization measures must be initiated as soon as practicable. Until temporary vegetative stabilization is achieved, interim measures such as straw or tackifiers must be employed. In areas of the site, where exploration and/or construction has permanently ceased prior to active mining, temporary stabilization measures must be implemented to minimize mobilization of sediment or other pollutants until such time as the active mining phase commences. i. Stabilization measures should be initiated immediately in portions of the site where mining, exploration, and/or construction activities have permanently ceased, but in no case more than 14 days after the exploration and/or construction activity in that portion of the site has permanently ceased and the area has not been converted to active mine site. If snow or freezing conditions exist, where initiating perennial vegetative stabilization measures is not possible within 14 days after mining, exploration, and/or construction activity has permanently ceased, final vegetative stabilization measures must be initiated as soon as possible. Until final stabilization is achieved temporary stabilization measures, such as straw or tackifiers must be used. I. Employee Training: Employees that work with materials that may lead to storm water pollution, employees that are responsible for maintenance and any contractors that may effect storm water quality will be trained in the contents of this plan. Training will focus on the effects of contaminated storm water discharge, activities that may contribute to storm water contamination, management practices to eliminate or control storm water discharges, allowable process water discharges (specifically mine dewatering effluent) and monitoring and inspection requirements. Refresher training will occur on an annual basis, and training records will be kept with this plan in Section J. Non-Storm Water Discharge Elimination: See Section for a list of nonstorm water sources and their management methods. K. Waste / Garbage / Floatable Debris Control: Solid materials including floatables will not be discharged. Screening on dewater pump inlets are used to control solid / floatable debris. L. Dust Generation / Trackout Controls: Vehicle track out will be controlled along with the material handling areas by regular sweeping and / or washing.

13 Page 13 of 41 The following controls have been installed and implemented to meet the Numeric Effluent Limits as identified in Section 8 of the MSGP: Mine dewatering discharges from construction sand & gravel operations are subject to Numeric Effluent Limits for ph under Section 8.J.9 of the MSGP. As materials entrained in groundwater during the mining process may adversely affect the ph of the groundwater, the primary control for ph in discharged groundwater is adequate settling time. Settling time is increased by diverting groundwater to the settling pond prior to discharge. No other Numeric Effluent Limits apply to this operation. No additional controls have been installed and implemented to meet the waste load allocation of the TSS TMDL for the Boise River. The controls previously identified are deemed sufficient Schedules and Procedures Schedule of Control Measure Implementation: Pollution Source Control Schedule Trash / dumpsters Empty bins standing schedule Weekly Scrap metal bins Empty bins Vendor contacted by shop On Call manager when full Used Oil Picked up by recycler by contract Monthly Used Antifreeze Picked up by recycler by contract Semi-Annually Chemical toilets Inspected / maintained by vendor Weekly standard industry practice Petroleum Releases SPCC plan inspections Daily during use Monthly formal Yellow iron Inspect for leaks as part of daily pretrip Daily during use inspection. Records maintained by the Maintenance Division. Plant machinery Inspect for leaks - as part of monthly Daily during use plant safety inspection and informally daily. All Sources Employee Training Annually Schedule of Monitoring and Inspections A. When mine dewatering occurs, benchmark Monitoring will be performed at the appropriate outfall. The area draining to this outfall is exposed to construction sand & gravel activities. The following sector-specific benchmark parameters will be sampled for at each applicable outfall:

14 Page 14 of 41 Subsector Outfall Parameter Benchmark Concentration Subsector J1. Sand and Gravel OF1 Total Suspended Solids 100 mg/l Mining (SIC 1442) (TSS) OF1 Nitrate plus Nitrite Nitrogen 0.68 mg/l Quarterly benchmark monitoring requirements begin in the first full quarter following July 1, 2009 and will be conducted at least once in each of the following 3-month intervals: January 1 March 31; April 1 June 30; July 1 September 30; and October 1 December 31. Data not exceeding benchmarks: After collection of 4 quarterly samples, if none of 4 monitoring values for any parameter exceed the benchmark, the monitoring requirements for that parameter for the permit term have been completed. Data exceeding benchmarks: If any of the four quarterly samples for any parameter exceeds the benchmark, the exceedance will be documented in this SWPPP within 24 hours of discovery. A Corrective Action will be initiated (see Section ). The selection, design, installation, and implementation of control measures must be reviewed to determine if modifications are necessary to meet the effluent limits in the 2008 MSGP. One of the following actions will be taken: (1) Make the necessary modifications and continue quarterly monitoring until four consecutive quarters of monitoring are less than the benchmark concentration. (2) Make a determination that no further pollutant reductions are technologically available and economically practicable and achievable in light of best industry practice to meet the technology-based effluent limits or are necessary to meet the water-quality-based effluent limitations in Parts 2 of this permit, in which case monitoring must be performed once per year. Document the rationale for concluding that no further pollutant reductions are achievable, retain all records related to this documentation with this SWPPP, and notify EPA and IDEQ of this determination in the next benchmark monitoring report. B. Effluent Limit Monitoring will be performed twice per year at the OF1 outfall. The area draining to this outfall is exposed to construction sand & gravel mine dewatering effluent.

15 Page 15 of 41 The following effluent limit parameters will be sampled for at each applicable outfall: (List by outfall) Subsector Outfall Parameter Effluent Limit Mine dewatering discharges at construction sand & gravel mining facilities (SIC 1442) OF1 ph Annual effluent limit monitoring requirements begin in the first year following July 1, 2009 and will be conducted according to the following schedule (this schedule is altered from the schedule identified in the 2008 MSGP due to the fact that the permit was not authorized in Idaho until February 26, 2009): Year 1: February 26, 2009 February 26, 2010 Year 2: February 26, 2010 February 26, 2011 Year 3: February 26, 2011 February 26, 2012 Year 4: February 26, 2012 February 26, 2013 Year 5: February 26, 2013 September 29, 2013 If a discharge sample exceeds a numeric effluent limit, follow-up monitoring will be conducted within 30 calendar days (or during the next qualifying runoff event should none occur within 30 days) after implementing corrective actions. If this follow-up monitoring exceeds the applicable effluent limitation, an Exceedance Report consistent with Part 7.3. of the MSGP must be filed. Additionally, quarterly monitoring will be conducted until the discharge is in compliance. C. State Specific Monitoring: If any one benchmark monitoring sample exceeds the benchmark, the procedures outlined in A will be completed. D. Impaired Waters Monitoring: The receiving waters for this site are impaired for the following pollutants: TSS and bacteria. TSS is already being monitored as part of the benchmark monitoring. Bacteria is not an identified pollutant from this industrial source. Monitoring for total coliform will be conducted once per year unless results are not detectible above natural background levels. Impaired Waters Monitoring Schedule: As the Boise River has an EPA approved TMDL for TSS, no additional monitoring is required for TSS unless EPA informs, upon examination of the applicable TMDL and/or WLA, that the discharge is subject to such a requirement consistent with the assumptions of the applicable TMDL and/or WLA. EPA s notice will include specifications on which pollutant to monitor and the required

16 Page 16 of 41 monitoring frequency during the first year of permit coverage. If detect the presence of the pollutant causing the impairment in the stormwater discharge for any of the samples collected in the first year, continue monitoring annually throughout the term of the permit, unless the TMDL specifies more frequent monitoring, in which case follow the TMDL requirements. E. Other EPA Monitoring requirements do not apply to this site. F. Monitoring Procedures Monitored Outfalls: Discharge of uncontaminated groundwater and stormwater occurs at outfall OF1 Commingled Discharges: There are no other commingled discharges associated with this site. Measurable Storm Events: All required monitoring must be performed on a storm event that results in an actual discharge from this site ( measurable storm event ) that follows the preceding measurable storm event by at least 72 hours (3 days). In the case of snowmelt, the monitoring must be performed at a time when a measurable discharge occurs from this site. For each monitoring event, except snowmelt monitoring, the date and duration (in hours) of the rainfall event, rainfall total (in inches) for that rainfall event, and time (in days) since the previous measurable storm event will be recorded on the monthly inspection form for the month sampled. For snowmelt monitoring, you must identify the date of the sampling event. Sample Type: Samples will be collected by a member of the Pollution Prevention Team (see Section 5.1.1). A minimum of one grab sample from a discharge resulting from a measurable storm event will be collected within the first 30 minutes of a measurable storm event. If it is not possible to collect the sample within the first 30 minutes of a measurable storm event, the sample must be collected as soon as practicable after the first 30 minutes and documentation must be recorded on the monthly inspection form for the month sampled explaining why it was not possible to take samples within the first 30 minutes. In the case of snowmelt, samples must be taken during a period with a measurable discharge. Samples will be collected in the following containers, and taken to the lab within the listed hold time: Analysis Method Container Preservative Hold Time TSS ml Poly Cool 4deg C 7 days max Nitrate / Nitrite ml Poly Cool 4 deg C H 2 SO 4 ph<2 28 days max

17 Page 17 of 41 Total Iron ml Poly Cool 4deg C 48 hours max ph ml Poly Cool 4deg C ASAP Total coliform WMMO 120 ml sterile Sodium thisulfate 8 hours max A chain of custody will be completed for each sample taken to the lab. Samples will be placed in a cooler with ice or a cool-pack while being held / delivered to the lab. Samples will be taken to: Analytical Laboratories, Inc 1804 N 33rd Street Boise, ID (208) Adverse Weather Conditions: Employee safety takes priority over all else, including protection of the environment. When adverse weather conditions (those that are dangerous or create inaccessibility for personnel, such as local flooding, high winds, or electrical storms, or situations that otherwise make sampling impractical, such as drought or extended frozen conditions) prevent the collection of samples according to the relevant monitoring schedule, a substitute sample will be taken during the next qualifying storm event. Adverse weather does not exempt from having to file a benchmark monitoring report in accordance with the sampling schedule. G. Routine Facility Inspections The facility will be inspected on a monthly basis using the inspection sheet found in Section This inspection will include all materials or activities exposed to storm water, BMP s and structural management features. The inspections will be performed by at least one member of the Pollution Prevention Team. At least once per year, the monthly inspection will be performed during a period when a stormwater discharge is occurring. The inspection documentation will include the following: the inspection date and time; the name(s) and signature(s) of the inspector(s); weather information and a description of any discharges occurring at the time of the inspection; any previously unidentified discharges of pollutants from the site; any control measures needing maintenance or repairs; any failed control measures that need replacement; any incidents of noncompliance observed; and any additional control measures needed to comply with the permit requirements. Any corrective action requirements identified by an inspection will be completed according to Section of this plan. H. Quarterly Visual Inspections Visual monitoring will occur at the outfall:

18 Page 18 of 41 Subsector Subsector J1. Sand and Gravel Mining (SIC 1442) Outfall OF1 The visual samples will be collected in a clear glass or plastic container, and observations will be performed in a well-lit area. The samples must be collected during the first 30 minutes of runoff from a storm event, and that occurred more than 72 hours from the last discharge event. The visual monitoring will include color, odor, clarity, floating solids, settled solids, suspended solids, foam, oil sheen or other indicators of storm water pollution. The results of the observations will be recorded on the Visual Monitoring Form (Section 5.5.6). The documentation will include: sample location(s), sample collection date and time, and visual assessment date and time for each sample; personnel collecting the sample and performing visual assessment, and their signatures; nature of the discharge (i.e., runoff or snowmelt); results of observations of the stormwater discharge; probable sources of any observed stormwater contamination, and if applicable why it was not possible to take samples within the first 30 minutes. Copies of the quarterly visual inspection records will be kept with this plan. I. Comprehensive Site Inspections Comprehensive site inspections will be conducted according to the following schedule (this schedule is altered from the schedule identified in the 2008 MSGP due to the fact that the permit was not authorized in Idaho until February 26, 2009): Year 1: February 26, 2009 February 26, 2010 Year 2: February 26, 2010 February 26, 2011 Year 3: February 26, 2011 February 26, 2012 Year 4: February 26, 2012 February 26, 2013 Year 5: February 26, 2013 September 29, 2013 If coverage is administratively continued after the expiration date of the permit, these inspections will continue annually until no longer covered. Comprehensive site inspections will be conducted by at least one member of the Stormwater Pollution Prevention Team. Comprehensive site inspections will cover all areas of the facility affected by the requirements in this plan, including the areas identified as potential pollutant sources (see Section 5.1.3) where industrial materials or activities are exposed to stormwater, any areas where control measures are used to comply with the effluent limits, and areas where spills and leaks have occurred in the past 3 years. The inspections will also include a review of collected monitoring data and the results of past visual monitoring results.

19 Page 19 of 41 The following will be included in the inspection: industrial materials, residue, or trash that may have or could come into contact with stormwater; leaks or spills from industrial equipment, drums, tanks, and other containers; offsite tracking of industrial or waste materials, or sediment where vehicles enter or exit the site; tracking or blowing of raw, final, or waste materials from areas of no exposure to exposed areas; and control measures needing replacement, maintenance, or repair. Stormwater control measures specified by this plan will be observed to ensure that they are functioning correctly. If discharge locations are inaccessible, nearby downstream locations will be inspected. The annual comprehensive site inspection can be used as one of the routine monthly inspections. The following will be included in the comprehensive site inspection documentation: the date of the inspection; the name(s) and title(s) of the personnel making the inspection; findings from the examination of areas of the facility identified in Section 5.1.3; all observations relating to the implementation of the control measures including: previously unidentified discharges from the site, previously unidentified pollutants in existing discharges, evidence of, or the potential for, pollutants entering the drainage system; evidence of pollutants discharging to receiving waters at all facility outfall(s), the condition of the outfall including flow dissipation measures to prevent scouring, and additional control measures needed to address any conditions requiring corrective action identified during the inspection, any required revisions to the SWPPP resulting from the inspection; any incidents of noncompliance observed or a certification stating the facility is in compliance with this permit (if there is no noncompliance); and a statement, signed and certified in accordance with Appendix B, Subsection 11 of the permit. J. Reporting All monitoring data collected will be submitted to EPA and to the DEQ Regional Office no later than 30 days ( date or postmark date) after all laboratory results for all monitored outfalls have been collected for the reporting period. For benchmark monitoring, sampling results will be submitted to EPA no later than 30 days after receiving laboratory results for each quarter. Regional DEQ Office: 1445 North Orchard Boise, Idaho Attn: Water Quality An annual report will be submitted to EPA that includes the findings from the Comprehensive Site Inspection and any corrective action documentation. If corrective action is not yet completed at the time of submission of the annual

20 Page 20 of 41 report, the status of any outstanding corrective action(s) will be described in the report. The report will be submitted to EPA within 45 days (postmark date) after conducting the Comprehensive Site Inspection. If follow-up monitoring pursuant to Section (B) exceeds a numeric effluent limit, an Exceedance Report will be sent to EPA and the DEQ Regional Office no later than 30 days after lab results are received. The report will include the following: NPDES permit tracking number; facility name, physical address and location; name of receiving water; monitoring data from this and the preceding monitoring event(s); an explanation of the situation; what has been done and is intend to do (should corrective actions not yet be complete) to correct the violation; and an appropriate contact name and phone number. Where applicable, the following reports will be submitted to the EPA Region 10 Office listed and to the MS4 operator (Section 5.1.2): 24-hour reporting - any noncompliance which may endanger health or the environment. Any information must be provided orally within 24 hours from the time you become aware of the circumstances. 5-day follow-up reporting to the 24 hour reporting - a written submission must also be provided within five days of the time you become aware of the circumstances. Reportable quantity spills - provide notification as soon as you have knowledge of a leak, spill, or other release containing a hazardous substance or oil in an amount equal to or in excess of a Reportable Quantity. Planned changes give notice to EPA as soon as possible of any planned physical alterations or additions to the permitted facility that qualify the facility as a new source or that could significantly change the nature or significantly increase the quantity of pollutants discharged. Anticipated noncompliance give advance notice to EPA of any planned changes in the permitted facility or activity which you anticipate will result in noncompliance with permit requirements. Transfer of ownership and/or operation submit a complete and accurate NOI in accordance with the requirements of Appendix G of the MSGP and by the deadlines specified in Table 1-2 of the MSGP.

21 Page 21 of 41 Other noncompliance - report all instances of noncompliance not reported in the monitoring report, compliance schedule report, or 24-hour report at the time monitoring reports are submitted. Other information promptly submit facts or information if you become aware that you failed to submit relevant facts in your NOI, or that you submitted incorrect information in your NOI or in any report Corrective Actions If any of the following conditions occur, the selection, design, installation, and implementation of control measures identified in this plan must be reviewed to ensure that the condition is eliminated and will not be repeated in the future: an unauthorized release or discharge (e.g., spill, leak, or discharge of nonstormwater not authorized by this or another NPDES permit), a discharge violates a numeric effluent limit; you become aware, or EPA determines, that the control measures are not stringent enough for the discharge to meet applicable water quality standards; an inspection or evaluation of your facility by an EPA official, or local, State, or Tribal entity, determines that modifications to the control measures are necessary to meet the non-numeric effluent limits in this plan; or a routine facility inspection, quarterly visual assessment, or comprehensive site inspection indicates that control measures are not being properly operated and maintained. If any of the following conditions occur, the selection, design, installation, and implementation of control measures identified in this plan must be reviewed to determine if modifications are necessary to meet the effluent limits in this plan: construction or a change in design, operation, or maintenance at this facility significantly changes the nature of pollutants discharged in stormwater from this facility, or significantly increases the quantity of pollutants discharged; or the average of 4 quarterly sampling results exceeds an applicable benchmark. If less than 4 benchmark samples have been taken, but the results are such that an exceedance of the 4 quarter average is mathematically certain (i.e., if the sum of quarterly sample results to date is more than 4 times the benchmark level) this is considered a benchmark exceedance, triggering this review. Documentation of any of the above conditions will be made within 24 hours of making such discovery. Subsequently, within 14 days of such discovery, document any corrective action(s) to be taken to eliminate or further investigate the deficiency, or if no corrective action is needed, the basis for that determination (See Section (J)). If changes are necessary following the

22 Page 22 of 41 review, any modifications to control measures must be made before the next storm event if possible, or as soon as practicable following that storm event. Within 24 hours of discovery of any condition listed above, document the following information (i.e., questions 3-5 of the Corrective Actions section in the Annual Reporting Form, provided in Appendix C of this plan): identification of the condition triggering the need for corrective action review; description of the problem identified; and date the problem was identified. Within 14 days of discovery of any condition listed above, document the following information (i.e., questions 7-11 of the Corrective Actions section in the Annual Reporting Form, provided in Appendix C of this plan): summary of corrective action taken or to be taken (or, for triggering events where you determine that corrective action is not necessary, the basis for this determination); notice of whether SWPPP modifications are required as a result of this discovery or corrective action; date corrective action initiated; and date corrective action completed or expected to be completed. This documentation must be submitted in an annual report, and a copy retained onsite with this plan Additional Documentation Endangered Species Determination A stormwater plan prepared for the subdivision in August 2012 by SYMAN LLC indicated that an endangered species review did not reveal any exposed species (Bald Eagles have been de-listed since the initial FWS review was completed). The following results were obtained from the screening process identified in Appendix E of the 2008 MSGP: Criteria A: No Exposed Species Criteria B: ESA 7 Criteria C: ESA 10 Criteria D: USFW Coordination Criteria E: Unlikely to Affect Criteria F: Other Operator Certification XXXXXXX Endangered Species Protective Measures: Not applicable Historic Properties Determination An Idaho Department of Lands Reclamation Plan S was issued in November A Historic Properties assessment was completed as part of the approval process. No historic properties / cultural resource issues were identified.

23 Page 23 of 41 The following results were obtained from the screening process identified in Appendix F of the 2006 MSGP: Criteria A: No historic sites no BMP construction Criteria B: BMP construction will not affect historic sites XXXXXXXX Criteria C: Potential to affect SHPO agreement Criteria D: Potential to affect no response from SHPO NEPA Review There are no discharges from this facility subject to New Source Performance Standards the National Environmental Policy Act does not apply.

24 5.1.7 SWPPP Certification Page 24 of 41 I, Eric St Pierre (responsible corporate official), certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a systems designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name and Official Title: Area Code and Telephone Signature Date Signed

25 Page 25 of SWPPP Plan Modification This SWPPP will be modified whenever necessary to address any of the triggering conditions for corrective action in Section , and to ensure that they do not reoccur, or to reflect changes implemented when a review following the triggering conditions indicates that changes to control measures are necessary to meet the effluent limits in this plan. Changes to this SWPPP document must be made in accordance with the corrective action deadlines in Section , and must be signed and dated in accordance with Section of this plan SWPPP Availability A copy of this SWPPP must be immediately available to EPA; a State, Tribal, or local agency approving stormwater management plans; the operator of an MS4 receiving discharges from the site; and representatives of the U.S. Fish and Wildlife Service (USFWS) or the National Marine Fisheries Service (NMFS) at the time of an onsite inspection or upon request. EPA may provide access to portions of this SWPPP to a member of the public upon request. Confidential Business Information (CBI) may be withheld from the public, but may not be withheld from those staff cleared for CBI review within EPA, USFWS, or NMFS Documentation Requirements The following inspection, monitoring, and certification records are required to be kept complete and up-to-date with this SWPPP that together demonstrate full compliance with the conditions of this permit: A copy of the NOI submitted to EPA along with any correspondence exchanged between EPA specific to coverage under this permit; A copy of the acknowledgment letter received from the NOI Processing Center or enoi system assigning your permit tracking number; A copy of the MSGP (an electronic copy easily available to SWPPP personnel is also acceptable); Descriptions and dates of any incidences of significant spills, leaks, or other releases that resulted in discharges of pollutants to waters of the U.S.,

26 Page 26 of 41 through stormwater or otherwise; the circumstances leading to the release and actions taken in response to the release; and measures taken to prevent the recurrence of such releases; Records of employee training, including date training received; Documentation of maintenance and repairs of control measures, including the date(s) of regular maintenance, date(s) of discovery of areas in need of repair/replacement, and for repairs, date(s) that the control measure(s) returned to full function, and the justification for any extended maintenance/repair schedules; All inspection reports, including the Routine Facility Inspection Reports, the Quarterly Visual Assessment Reports, and the Comprehensive Site Inspection Reports; Description of any deviations from the schedule for visual assessments and/or monitoring, and the reason for the deviations (e.g., adverse weather or it was impracticable to collect samples within the first 30 minutes of a measurable storm event); Description of any corrective action taken at this site, including triggering event and dates when problems were discovered and modifications occurred; Documentation of any benchmark exceedances and how they were responded to, including either (1) corrective action taken, (2) a finding that the exceedence was due to natural background pollutant levels, or (3) a finding that no further pollutant reductions were technologically available and economically practicable and achievable in light of best industry practice; Documentation to support any determination that pollutants of concern are not expected to be present above natural background levels if discharging directly to impaired waters, and that such pollutants were not detected in the discharge or were solely attributable to natural background sources; Documentation to support your claim that this facility has changed its status from active to inactive and unstaffed with respect to the requirements to conduct routine facility inspections (see Part 4.1.3), quarterly visual assessments (see Part 4.2.3), and/or benchmark monitoring (see Part ).

27 Page 27 of NOI / Permit Tracking Documents

28 Page 28 of MSGP

29 Page 29 of Employee Training Records

30 Page 30 of Control Measure Maintenance & Repair Records

31 Page 31 of Monthly Inspection Reports

32 Page 32 of Quarterly Visual Monitoring Report

33 Page 33 of Annual Comprehensive Inspection Report

34 Page 34 of Schedule Deviations

35 Page 35 of Corrective Action Reports

36 Page 36 of Benchmark Monitoring Exceedances

37 Page 37 of Background Pollutants

38 Page 38 of Monitoring Results

39 Page 39 of Activity Status

40 Page 40 of SWPPP Amendment Log Instructions: Include in your records: A log of the date and description of any amendments to your SWPPP. Fill in the appropriate columns of this table for each amendment to your SWPPP. Amend. No. Description of the Amendment Date of Amendment Amendment Prepared by [Name(s) and Title] 1 Updated tracking number TBD P. Clark Coordinator