Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At:

Transcription

1 Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Harvey Jones Channel Improvements Project East end of channel Corrales, New Mexico SWPPP Prepared For: Southern Sandoval County Arroyo Flood Control Authority 1041 Commercial Dr. SE Rio Rancho, New Mexico FAX SWPPP Prepared By: David Gatterman, Environmental Services Director Southern Sandoval County Arroyo Flood Control Authority 1041 Commercial Dr. SE Rio Rancho, New Mexico FAX SWPPP Preparation Date: Estimated Project Dates: Project Start Date: Project Completion Date: Southern Sandoval County Arroyo Flood Control Authority i

2 Contents SECTION 1: CONTACT INFORMATION/RESPONSIBLE PARTIES Operator(s) / Subcontractor(s) Stormwater Team Operator Responsibility... 3 SECTION 2: SITE EVALUATION, ASSESSMENT, AND PLANNING Project/Site Information A Project/ Site Information: Existing Conditions, Runoff Coefficient, Soil, and Rainfall Information Discharge Information Nature of the Construction Activity Sequence and Estimated Dates of Construction Activities Allowable Non-Stormwater Discharges Site Maps and Construction Plans... 8 SECTION 3: DOCUMENTATION OF COMPLIANCE WITH OTHER FEDERAL REQUIREMENTS Endangered Species Protection Historic Preservation SECTION 4: EROSION AND SEDIMENT CONTROLS Perimeter Controls Sediment Track-Out Stockpiled Sediment or Soil Minimize Dust Minimize the Disturbance of Steep Slopes Soil Compaction Storm Drain Inlets Sediment Basins Site Stabilization SECTION 5: POLLUTION PREVENTION STANDARDS Potential Sources of Pollution Spill Prevention and Response Fueling and Maintenance of Equipment or Vehicles Washing of Equipment and Vehicles Storage, Handling, and Disposal of Construction Products, Materials, and Wastes Washing of Applicators and Containers used for Paint, Concrete or Other Materials Fertilizers SECTION 6: INSPECTION AND CORRECTIVE ACTION Inspection Personnel and Procedures Corrective Action Delegation of Authority SECTION 7: TRAINING SECTION 8: CERTIFICATION AND NOTIFICATION SWPPP APPENDICES Southern Sandoval County Arroyo Flood Control Authority ii

3 SECTION 1: CONTACT INFORMATION/RESPONSIBLE PARTIES 1.1 Operator(s) / Subcontractor(s) Operator: Southern Sandoval County Arroyo Flood Control Authority 1041 Commercial Dr. SE Rio Rancho, NM (505) FAX (505) Operator: Payam Ghoreishi PG Enterprises LLC 301 Murray SE Albuquerque, NM (505) Subcontractor(s): CBKN Construction 45 Yerba Manza Bernalillo, NM (505) Emergency 24-Hour Contact: Jim Service Field Services Director Southern Sandoval County Arroyo Flood Control Authority 1041 Commercial Dr. SE Rio Rancho, NM Office: (505) Stormwater Team The stormwater team is responsible for developing, implementing, maintaining, and revising this SWPPP. This collaborative effort provides access to deeper levels of expertise than would be feasible otherwise, ensuring the appropriate measure of compliance. Charles Thomas, P.E. Southern Sandoval Arroyo Flood Control Authority 1

4 Executive Engineer Southern Sandoval County Arroyo Flood Control Authority Office: (505) Jim Service Field Services Director Southern Sandoval County Arroyo Flood Control Authority Office: (505) David Gatterman, P.E. Environmental Services Director Southern Sandoval County Arroyo Flood Control Authority Office: (505) Payam Ghoreishi PG Enterprises LLC 301 Murray SE Albuquerque, NM (505) Southern Sandoval Arroyo Flood Control Authority 2

5 1.3 Operator Responsibility Action Develop a SWPPP and ensure project specifications meet minimum requirements of the Construction General Permit (CGP). File Operator Notice of Intent (NOI)/Notice of Termination (NOT) Ensure Project specifications meet minimum requirements of permit conditions. Make SWPPP available at the time of an onsite inspection or upon request by EPA. Ensure all areas of the project are included in the SWPPP Update SWPPP as necessary. Preform regular inspections and rain event inspections BMP Installation Ensure temporary/permanent stabilization practices are implemented within 14 days Ensure permanent stabilization File Operator Notice of Intent (NOI)/Notice of Termination (NOT) Clean up leaks and spills Responsibility David Gatterman Charles Thomas Jim Service PG Enterprises The term operator is defined by the EPA as Operator for the purpose of this permit and in the context of stormwater discharges associated with construction activity, any party associated with a construction project that meets either of the following two criteria: 1. The party has operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications; or 2. The party has day-to-day operational control of those activities at a project that are necessary to ensure compliance with the permit conditions (e.g., they are authorized to direct workers at a site to carry out activities required by the permit). The operator may be the owner, developer, engineer, municipality, or general contractor. Other parties responsible for construction activities on the site are identified as co-permittees. Southern Sandoval Arroyo Flood Control Authority 3

6 SECTION 2: SITE EVALUATION, ASSESSMENT, AND PLANNING 2.1 Project/Site Information Project Name and Address Project/Site Name: Harvey Jones Channel Improvements Project Project Street/Location: East end of Harvey Jones Channel City: Corrales State: New Mexico ZIP Code: County: Sandoval Project Latitude/Longitude Latitude: Longitude: º N (decimal degrees) º W (decimal degrees) Method for determining latitude/longitude: SSCAFCA GIS Horizontal Reference Datum: NAD 27 NAD 83 or WGS 84 Unknown If you used a U.S.G.S topographic map, what was the scale? Additional Project Information Is the project/site located on Indian country lands, or located on a property of religious or cultural significance to an Indian tribe? Yes No If yes, provide the name of the Indian tribe associated with the area of Indian country (including the name of Indian reservation if applicable), or if not in Indian country, provide the name of the Indian tribe associated with the property: N/A If you are conducting earth-disturbing activities in response to a public emergency, document the cause of the public emergency (e.g., natural disaster, extreme flooding conditions), information substantiating its occurrence (e.g., state disaster declaration), and a description of the construction necessary to reestablish effective public services: N/A Southern Sandoval Arroyo Flood Control Authority 4

7 Are you applying for permit coverage as a federal operator as defined in Appendix A of the 2012 CGP? Yes No Southern Sandoval Arroyo Flood Control Authority 5

8 2.1A Project/ Site Information: Existing Conditions, Runoff Coefficient, Soil, and Rainfall Information 1. Existing and Previous Land Use (include and reference physical site survey showing structures, topography, surface water and vegetation patterns): The property consists of an existing concrete-lined channel, soil cement apron, and bare earth devoid of vegetation. 2. Total Site Acres: 1.96 Total Acres Disturbed: Data Table 2yr/24 hour storm rainfall = 1.32 inches Pre-Construction Post Construction Net Change Percent Impervious Surface 46.5% 46.5% 0% Weighted Runoff Coefficient* yr/24 hour runoff volume in acre-feet ac-ft ac-ft ac-ft Peak discharge rate (cubic feet per second) 1.43cfs 1.43 cfs 0.00 cfs 4. Soils Information Soil Type(s)** Sheppard loamy fine sand Description 3 to 8 percent slopes, low runoff, well drained Erodibility Factor (K) Rainfall Erosivity (R) The site is located in Corrales, NM Sandoval County Total precipitation in 2012 ** = 5.46 inches Long term annual normal precipitation (1892 to current) is 8.53 inches, while the 30 year normal ( ) is 9.45 inches Month(s) of highest rainfall: July and August *Rational Method C as Q=CiA runoff coefficient (empirical coefficient representing the relationship between rainfall rate and runoff rate). **Information usually available in county soils report and from National Weather Service Weather Forecast Office Southern Region Headquarters at Southern Sandoval Arroyo Flood Control Authority 6

9 2.2 Discharge Information Does your project/site discharge stormwater into a Municipal Separate Storm Sewer System (MS4)? Yes No Are there any surface waters that are located within 50 feet of your construction disturbances? Yes No Southern Sandoval Arroyo Flood Control Authority 7

10 Table 1 Names of Receiving Waters Name(s) of the first surface water that receives stormwater directly from your site and/or from the MS4 (note: multiple rows provided where your site has more than one point of discharge that flows to different surface waters) 1. Rio Grande Table 2 Impaired Waters / TMDLs (Answer the following for each surface water listed in Table 1 above) If you answered yes, then answer the following: Is this surface Has a TMDL water listed as What pollutant(s) are causing been Title of the TMDL document impaired? the impairment? completed? Pollutant(s) for which there is a TMDL 1. YES NO Avian sources (waterfowl YES NO TMDL for the Middle Rio Grande Watershed E. coli and/or other), Impervious surface/parking lot runoff, municipal (urbanized high density area), source unknown, wastes from pets, On-site Treatment Systems (septic systems and similar decentralized systems). 2. YES NO YES NO 3. YES NO YES NO Describe the method(s) you used to determine whether or not your project/site discharges to an impaired water: Notice of Intent and NMED TMDL for the Middle Rio Grande Watershed Table 3 Tier 2, 2.5, or 3 Waters (Answer the following for each surface water listed in Table 1 above) Is this surface water designated as a Tier 2, Tier 2.5, or Tier 3 water? (see Appendix F) If you answered yes, specify which Tier (2, 2.5, or 3) the surface water is designated as? 1. YES NO Tier 2 2. YES NO 3. YES NO Southern Sandoval County Arroyo Flood Control Authority 5

11 2.3 Nature of the Construction Activity General Description of Project This project will consist of the excavation of a sediment capture pond, removal of existing soil cement, and the reconfiguration of the invert of the concrete lined Harvey Jones Channel. General soil disturbing activities will include: Excavation of a sedimentation retention basin at the end of the concrete channel Demolition of the invert of the existing concrete channel Construction of a trapezoidal shaped invert in the existing channel Construction of concrete access ramps and a concrete apron at bottom of sedimentation basin Removal of soil cement apron at the end of the concrete channel Refer to Section 2.6, for additional details. Size of Construction Project The 2.5 acre site is an active arroyo drainage management by SSCAFCA. There are no structures (aside from the channel being modified) or vegetation on the property. Construction Support Activities (only provide if applicable) Describe any construction support activities for the project (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) Equipment Staging Area property owned by SSCAFCA. Adjacent to project site, outside of floodway. Latitude: Longitude: º N (decimal degrees) º W (decimal degrees) ` Southern Sandoval County Arroyo Flood Control Authority 5

12 2.4 Sequence and Estimated Dates of Construction Activities The Contractor (Operator) will be responsible for implementing erosion control and stormwater management control measures. The Operator may designate these tasks to subcontractors as he/she see fit, but the ultimate responsibility for implementing these controls and ensuring proper function remains with the Operator. The Erosion Control Plan (ECP) provides location and details for temporary and permanent Best Management Practice (BMP) installation. Perimeter controls, stabilized construction entrance, sediment basin, and inlet protection are required prior to initial land-disturbing activities. The order of activities will be as follows: Phase I A. Post Notice of Intent. B. Begin excavating sediment pond. C. Using first spoils from excavation, construct erosion control berm from native materials. D. Complete excavation of the sediment retention pond to proposed design E. Remove soil cement apron from east end of concrete channel F. Disturbed areas of the site where construction activity has ceased for more than 14 days shall be temporarily seeded. Phase II H. Begin demolition of existing concrete channel invert. I. Reshape bottom of channel from current geometry to trapezoidal geometry. J. Install concrete along reshaped channel invert. K. Carry out final grading, seeding and planting (Final Stabilization). L. Inspection, maintenance, recordkeeping and site posting shall continue until final stabilization. M. Remove berm only after all paving is complete and exposed surfaces are stabilized. Southern Sandoval County Arroyo Flood Control Authority 6

13 2.5 Allowable Non-Stormwater Discharges Certain types of discharges are allowable under the U.S. Environmental Protection Agency Construction General Permit, and it is the intent of this SWPPP to allow such discharges. These types of discharges will be allowed under the conditions that no pollutants will be allowed to come in contact with the water prior to or after its discharge. The control measures which have been outlined in this SWPPP will be followed to ensure that no contamination of these non-storm water discharges take place. Furthermore, some states may prohibit any non-storm water discharges, allow a limited number of types on non-storm water discharges and/or will require coverage for non-storm water discharges under a separate permit. Type of Allowable Non-Stormwater Discharge Likely to be Present at Your Site? Discharges from emergency fire-fighting activities YES NO Fire hydrant flushing YES NO Landscape irrigation YES NO Waters used to wash vehicles and equipment YES NO Water used to control dust YES NO Potable water including uncontaminated water line flushing YES NO Routine external building wash down YES NO Pavement wash waters YES NO Uncontaminated air conditioning or compressor condensate YES NO Uncontaminated, non-turbid discharges of ground water or spring water YES NO Foundation or footing drains YES NO Construction dewatering water YES NO (Note: You are reminded of the requirement to identify the likely locations of these allowable nonstormwater discharges on your site map. Southern Sandoval County Arroyo Flood Control Authority 7

14 2.6 Site Maps and Construction Plans See SWPPP plan inserts Southern Sandoval County Arroyo Flood Control Authority 8

15 SECTION 3: DOCUMENTATION OF COMPLIANCE WITH OTHER FEDERAL REQUIREMENTS 3.1 Endangered Species Protection Eligibility Criterion Under which criterion listed in Appendix D are you eligible for coverage under this permit? A B C D E For reference purposes, the eligibility criteria listed in Appendix D are as follows: Criterion A. Criterion B. Criterion C. Criterion D. Criterion E. No federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in your site s action area as defined in Appendix A of this permit. The construction site s discharges and discharge-related activities were already addressed in another operator s valid certification of eligibility for your action area under eligibility Criterion A, C, D, E, or F and there is no reason to believe that federallylisted species or federally-designated critical habitat not considered in the prior certification may be present or located in the action area. To certify your eligibility under this Criterion, there must be no lapse of NPDES permit coverage in the other operator s certification. By certifying eligibility under this Criterion, you agree to comply with any effluent limitations or conditions upon which the other operator's certification was based. You must include in your NOI the tracking number from the other operator s notification of authorization under this permit. If your certification is based on another operator s certification under Criterion C, you must provide EPA with the relevant supporting information required of existing dischargers in Criterion C in your NOI form. Federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in or near your site s action area, and your site s discharges and discharge-related activities are not likely to adversely affect listed threatened or endangered species or critical habitat. This determination may include consideration of any stormwater controls and/or management practices you will adopt to ensure that your discharges and discharge-related activities are not likely to adversely affect listed species and critical habitat. To make this certification, you must include the following in your NOI: 1) any federally listed species and/or designated habitat located in your action area ; and 2) the distance between your site and the listed species or designated critical habitat (in miles). You must also include a copy of your site map with your NOI. Coordination between you and the Services has been concluded. The coordination must have addressed the effects of your site s discharges and discharge-related activities on federally-listed threatened or endangered species and federallydesignated critical habitat, and must have resulted in a written concurrence from the relevant Service(s) that your site s discharges and discharge-related activities are not likely to adversely affect listed species or critical habitat. You must include copies of the correspondence between yourself and the Services in your SWPPP and your NOI. Consultation between a Federal Agency and the U.S. Fish and Wildlife Service and/or the National Marine Fisheries Service under section 7 of the ESA has been concluded. The consultation must have addressed the effects of the construction site s discharges and discharge-related activities on federally-listed threatened or endangered species and federally-designated critical habitat. The result of this consultation must be either: Southern Sandoval County Arroyo Flood Control Authority 9

16 i. a biological opinion that concludes that the action in question (taking into account the effects of your site s discharges and discharge-related activities) is not likely to jeopardize the continued existence of listed species, nor the destruction or adverse modification of critical habitat; or ii. written concurrence from the applicable Service(s) with a finding that the site s discharges and discharge-related activities are not likely to adversely affect federally-listed species or federally-designated habitat. You must include copies of the correspondence between yourself and the Services in your SWPPP and your NOI. Criterion F. Your construction activities are authorized through the issuance of a permit under section 10 of the ESA, and this authorization addresses the effects of the site s discharges and discharge-related activities on federally-listed species and federally-designated critical habitat. You must include copies of the correspondence between yourself and the Services in your SWPPP and your NOI. Supporting Documentation Provide documentation for the applicable eligibility criterion you select in Appendix D, as follows: For criterion D, E, or F, attach copies of any letters or other communication between you and the U.S. Fish & Wildlife Service or National Marine Fisheries Service concluding consultation or coordination activities. 3.2 Historic Preservation Appendix E, Step 1 Do you plan on installing any of the following stormwater controls at your site? Check all that apply below, and proceed to Appendix E, Step 2. Dike Berm Catch Basin Pond Stormwater Conveyance Channel (e.g., ditch, trench, perimeter drain, swale, etc.) Culvert Other type of ground-disturbing stormwater control Southern Sandoval County Arroyo Flood Control Authority 10

17 (Note: If you will not be installing any ground-disturbing stormwater controls, no further documentation is required for Section 3.2 of the Template.) Appendix E, Step 2 If you answered yes in Step 1, have prior surveys or evaluations conducted on the site already determined that historic properties do not exist, or that prior disturbances at the site have precluded the existence of historic properties? YES NO If yes, no further documentation is required for Section 3.2 of the Template. If no, proceed to Appendix E, Step 3. Appendix E, Step 3 If you answered no in Step 2, have you determined that your installation of subsurface earthdisturbing stormwater controls will have no effect on historic properties? YES NO If yes, provide documentation of the basis for your determination. New Mexico s Rich Cultural Heritage: Listed State and National Register Properties REFER TO APPENDIX L If no, proceed to Appendix E, Step 4. Appendix E, Step 4 If you answered no in Step 3, did the State Historic Preservation Officer (SHPO), Tribal Historic Preservation Office (THPO), or other tribal representative (whichever applies) respond to you within 15 calendar days to indicate whether the subsurface earth disturbances caused by the installation of stormwater controls affect historic properties? YES NO If no, no further documentation is required for Section 3.2 of the Template. If yes, describe the nature of their response: Written indication that adverse effects to historic properties from the installation of stormwater controls can be mitigated by agreed upon actions. INSERT COPIES OF LETTERS, S, OR OTHER COMMUNICATION BETWEEN YOU AND THE APPLICABLE SHPO, THPO, OR OTHER TRIBAL REPRESENTATIVE No agreement has been reached regarding measures to mitigate effects to historic properties from the installation of stormwater controls. INSERT COPIES OF LETTERS, S, OR OTHER COMMUNICATION BETWEEN YOU AND THE APPLICABLE SHPO, THPO, OR OTHER TRIBAL REPRESENTATIVE Other: INSERT COPIES OF LETTERS, S, OR OTHER COMMUNICATION BETWEEN YOU AND THE APPLICABLE SHPO, THPO, OR OTHER TRIBAL REPRESENTATIVE Southern Sandoval County Arroyo Flood Control Authority 11

18 Southern Sandoval County Arroyo Flood Control Authority 12

19 SECTION 4: EROSION AND SEDIMENT CONTROLS Site-specific temporary and permanent stabilization, erosion and sediment control BMPs and/or other controls designed to prevent an increase in the sediment yield and flow velocity from pre-construction, are identified in Section 2.6 of the SWPPP and as shown in Erosion Control Plan Sheet SWPPP-01. The rational for selecting temporary stabilization and structural BMPs is to prevent sediment from leaving the site specifically through the use of earthen berms, silt fence, and sediment basins. Earthen berms will be used as a barrier to direct stormwater to a sediment pond where sediment laden water can settle. Properly installed and maintained silt fence will be used on the down slope perimeter of the site; mat inlet filters will also mitigate sediment from silting in area inlets. This SWPPP includes an analysis of the average annual soil loss prior to, during and post-construction using the Revised Universal Soil Loss Equation (RUSLE). RUSLE utilizes five factors to average annual soil loss from sheet and erosion caused by rainfall and associated overland flow in tons/acre/yr, computed by each selecting values for each factor (soil type, climate, ground cover, geographic location, slope, and erosion control structures). REFER TO APPENDIX M RUSLE can be expressed as follows: A = R x K x LS x C x P A = average annual soil loss in tons per acre per year R = rainfall-runoff erosivity factor K = soil erodibility factor LS = a function of slope length and slope steepness C = erosion management factor P = supporting practices factor Southern Sandoval County Arroyo Flood Control Authority 13

20 4.1 Perimeter Controls General Maintain natural areas and supplement them with earthen berms on the downstream side of the site to help prevent soil erosion and stop sediment from leaving the site. Specific Perimeter Controls Perimeter Control # 1 Perimeter Control Description Earthen berm installed to prevent runoff from the construction site from leaving site. Installation Control or Practice Responsible Party Approx. Installation Date Earthen Berm PG Enterprises 04/09/2014 Maintenance Requirements Inspections should be made on a weekly basis, especially after large storm events. If the dirt berm becomes damaged, repair gaps in the berm or if necessary, replace berm using local materials. 4.2 Sediment Track-Out General Stabilized construction entrances are used to reduce offsite sediment tracking from trucks and construction equipment and for sites where considerable truck traffic occurs each day. They also reduce the need to clean adjacent pavement as often, and help route site traffic through a single point. Specific Track-Out Control Track-Out Control #1 Track-Out Control Description A course aggregate construction entrance/exit will be provided at each entrance used for access to help reduce vehicle tracking of sediment. The unpaved road adjacent to the site entrance will be inspected daily for accumulations of soil and maintained as necessary to remove any excess mud, dirt, or rock tracked from the site. Dump trucks hauling material to the site will be covered with tarpaulin. Refer to Appendix N Installation Control or Practice Responsible Party Approx. Installation Date Track-Out Control PG Enterprises 04/09/2014 Maintenance Requirements Southern Sandoval County Arroyo Flood Control Authority 14

21 Where sediment has been tracked-out from your site onto the surface of off-site streets, other paved areas, and sidewalks, you must remove the deposited sediment by the end of the same work day in which the track-out occurs or by the end of the next work day if track-out occurs on a non-work day. You must remove the track-out by sweeping, shoveling, or vacuuming these surfaces, or by using other similarly effective means of sediment removal. You are prohibited from hosing or sweeping tracked-out sediment into any stormwater conveyance (unless it is connected to a sediment basin, sediment trap, or similarly effective control), storm drain inlet, or surface water. 4.3 Stockpiled Sediment or Soil General Stormwater runoff to and from stockpiles shall be controlled to prevent material from creating a diversion of surface water to disturbed soils or from entering the surface water. Specific Stockpile Controls Stockpiled Sediment/Soil Control Description Topsoil stockpiles shall be surrounded with perimeter sediment control measures such as silt fence or earthen berm and be covered with non-erosive material as soon as practicable. Non-erosive material may include hydro-mulch, temporary seeding with straw mulch, tackifier, mulch, gravel, or other material providing suitable cover. Maintenance Requirements Do not hose down or sweep soil or sediment accumulated on pavement or other impervious surfaces into any stormwater conveyance (unless connected to a sediment basin, sediment trap, or similarly effective control), storm drain inlet, or surface water. 4.4 Minimize Dust General Minimizing wind erosion and controlling dust will be accomplished by one or more of the following methods. This will be done during high wind days of 25 MPH or when soil particles are visibly transported and deposited offsite. A. Covering 30% or more of the soil surface with non-erodible material. B. Roughening the soil to produce ridges perpendicular to the prevailing wind. C. Frequent watering of excavation and spoil areas. D. Providing gravel or paving at entrance/exit drives, parking areas and transit paths. 4.5 Minimize the Disturbance of Steep Slopes General Areas having a slope 3:1 or greater shall use soil roughening, gravel mulch, or erosion control mats to prevent erosion and soil loss. Specific Steep Slope Controls Southern Sandoval County Arroyo Flood Control Authority 15

22 Steep Slope Control # 1 Steep Slope Control Description Land Imprinting is an erosion control practice used in conjunction with final grading, seeding, and revegetation. Land Imprinting involves increasing the relief of a bare soil surface with horizontal grooves by mechanical equipment to track the surface. Soil roughening is not appropriate for all slopes, but works especially well on slopes greater than 3:1, on plies of excavated soil, and in areas with highly erodible soils. Use this practice in conjunction with seeding, planting, and temporary mulching to stabilize an area. A combination of surface roughening and vegetation is appropriate for steeper slopes and slopes that will be left bare for longer periods of time. Installation Control or Practice Responsible Party Approx. Installation Date Steep Slope Controls Not applicable N/A Maintenance Requirements Inspections should be made on a monthly basis. If roughening is washed away in a heavy storm, re-roughening the surface and reseed. 4.6 Soil Compaction General Unless otherwise specified subgrade soils and structural fill materials shall be compacted to the following percentages of the ASTM D-1557 maximum density. Materials Percent (%) Compaction Structural fill in the Building area 95 Sub Base for slab support 95 Miscellaneous backfill below structural fill or road 95 Miscellaneous backfill below unpaved, non-building areas 90 Seed Bed Preparation Depth Final vegetative stabilization - Mechanical Loosen soil to a minimum of 6 (six inches) Final vegetative stabilization - Hand Loosen soil to a minimum of 2 (two inches) 4.7 Storm Drain Inlets General No storm drain inlets are located in the vicinity of the project. Specific Storm Drain Inlet Controls Storm Drain Inlet Control # 1 Storm Drain Inlet Control Description Southern Sandoval County Arroyo Flood Control Authority 16

23 Not applicable. REFER TO APPENDIX N Installation Control or Practice Responsible Party Approx. Installation Date Fiber Mat Not applicable N/A Type I Silt Fence Option Not applicable N/A Type II Curb Opening Option Not applicable N/A Maintenance Requirements Not applicable 4.8 Sediment Basins General Temporary sediment traps or basins drain sediment-laden runoff for a period of time, allowing sediment to settle before the runoff is discharged. Proper design and maintenance are essential to ensure that these practices are affective. Specific Sediment Basin Controls Sediment Basin Control # 1 Sediment Basin Control Description At a minimum, sediment ponds must provide storage for either (1) the calculated volume of runoff from the 2-year, 24-hour storm, or (2) 3,600 cubic feet per acre drained. Proposed project is to construct a Sediment Basin for usage in flood control activities. Volume of basin to be constructed is 4.69 ac-ft. Refer to Appendix N Installation Control or Practice Responsible Party Approx. Installation Date Sediment Basin PG Enterprises By 5/10/2014 Maintenance Requirements Sediment basins will be used to control sediment, when necessary. In order to keep basins in effective operating condition, remove accumulated sediment at least ½ of the design capacity at all times. List all the soil types (including soil types expected to be found in fill material) that are expected to be exposed during construction: REFER TO SECTION 2.1A Southern Sandoval County Arroyo Flood Control Authority 17

24 4.9 Site Stabilization Site Stabilization Practice (only use this if you are not located in an arid, semi-arid, or drought-stricken area) Definitions Arid Areas areas with an average annual rainfall of 0 to 10 inches. Semi-Arid Areas areas with an average annual rainfall of 10 to 20 inches. Drought-stricken Area for the purpose of this permit, an area in which the National Oceanic and Atmospheric Administration s U.S. Seasonal Drought Outlook indicates for the period during which that any of the following conditions are likely: (1) Drought to persist or intensity, (2) Drought ongoing, some improvement, (3) Drought likely to improve, impact ease, (4) Drought development likely. Interim Stabilization What Where When Soil Roughening All disturbed areas. Apply on portions on the site Soil Tackifier that become inactive for more than 14 days, but not ready for permanent stabilization. Frequent Watering Excavation and fill areas. This will be done during high wind days of 25 MPH or when soil particles are visibly transported and deposited offsite Provide Gravel or Pavement Construction entrance/exit drives, parking areas and transit paths Prior to earth disturbing activities Permanent Stabilization What Where When Landscaping NA NA Gravel Mulch and Boulders Offsite spoil disposal area Apply during the final stage of the project. Native Grass Seeding and Straw Crimping See SSCAFCA standard seed mix on construction plans Apply during the final stage of the project. Southern Sandoval County Arroyo Flood Control Authority 18

25 SECTION 5: POLLUTION PREVENTION STANDARDS 5.1 Potential Sources of Pollution Pollutant-Generating Activity Construction Equipment Excavation/Backfill Pollutants or Pollutant Constituents (that could be discharged if exposed to stormwater) Oil, Grease, hydraulic fluid and other petroleum products Sediment Location on Site (or reference SWPPP site map where this is shown) Entire site Sediment pond and channel reshaping Concrete Toxic metals Channel invert Southern Sandoval County Arroyo Flood Control Authority 19

26 5.2 Spill Prevention and Response In order to prevent or minimize the potential for a spill of Hazardous Substances or Oil to come into contact with storm water, the following steps will be implemented: 1. All Hazardous Substances or Oil (such as pesticides, petroleum products, fertilizers, detergents, construction chemicals, acids, paint, paint solvents, cleaning solvents, additives for soil stabilization, concrete curing compounds and additives, etc.) will be stored in a secure location, with their lids on preferably under cover, when not in use. 2. The minimum practical quantity of all such materials will be kept on site. 3. It is the Contractors responsibility to ensure that all hazardous waste discovered or generated at the project site is disposed of properly by a licensed hazardous material disposal company. The Contractor is responsible for not exceeding hazardous waste storage requirements mandated by the EPA or state and local authority. In the event of a spill of Hazardous Substances or Oil, the following procedures must be followed: 1. All Measures must be taken to contain and abate the spill and to prevent the discharge of the Hazardous Substance of Oil to storm water or off-site. (The spill area must be kept well ventilated and personnel must wear appropriate protective clothing to prevent injury from contact with the hazardous Substance.) 2. Any spills of hazardous materials which are in excess of Reportable Quantities shall be reported to EPA National Response Center and New Mexico Environment s Ground Water Quality Bureau (505) (emergency, 24 hours a day) or (non-emergency voice mail, 24 hours a day). 3. If the release is equal to or in excess of a reportable quantity, the SWPPP must be modified within (7) calendar days of knowledge of the discharge to provide a description of the release, the circumstances leading to the release, and the date of the release. The SWPPP must identify measures to prevent the recurrence of such releases and to respond to such releases. Corrective Action Form in Appendix E must be completed in accordance with this requirement. 5.3 Fueling and Maintenance of Equipment or Vehicles General Contractor shall identify an area on the Erosion and Sediment Control Plan for equipment fueling, maintenance or repair. This area shall be protected by temporary perimeter berm preventing all surface runoff from leaving the area, or equivalent measure, and shall be located no closer than 100 from any storm inlet. Specific Pollution Prevention Practices Pollution Prevention Practice Description Fuel vehicles on-site only when off-site fueling is impractical. Drip pan or absorbent pad should be used when fueling. Southern Sandoval County Arroyo Flood Control Authority 20

27 Comply with local codes regarding fluid disposal. Spill cleanup kits should be available in fueling areas and on fueling trucks. Installation Fueling areas should be: Located at least 100 feet from waterways, channels, and storm drains Protected from stormwater runoff Located on a level-graded area Equipped with an automatic shut-off nozzle to contain drips Comply with federal, state, and local requirements relating to stationary aboveground petroleum storage tanks. Secondary containment measures should be employed whenever possible. The location of any fuel tanks and/or equipment maintenance areas must be identified on Plan Sheet SWPPP-01 Erosion Control Plan, by the inspector once the location has been determined. Maintenance Requirements Containment must provide sufficient volume to contain expected precipitation and 110% volume of the largest tank. Accumulated rainwater or spills from containment areas are to be promptly pumped into a containment device and disposed of properly by a licensed hazardous waste transporter. Drip pans shall be provided for all dispensers. Any asphalt substances used onsite will be applied according to the manufacturer s recommendations. 5.4 Washing of Equipment and Vehicles General Contractor shall identify an area on the Erosion and Sediment Control Plan for washing of equipment and vehicles. This area shall be protected by temporary perimeter berm preventing all surface runoff from leaving the area, or equivalent measure, and shall be located no closer than 100 from any storm inlet. External washing of trucks and other construction vehicles must be confined to this area. No engine degreasing, asphalt equipment or tool washing is permitted. Specific Pollution Prevention Practices Pollution Prevention Practice Description Conduct washing, fueling, and major maintenance off-site whenever possible. Installation In the event on-site equipment/vehicle washing must occur: Locate wash area way from storm drain inlets, drainage facilities or waterways Install a sump to collect wash water Consider using high-pressure washer/sprayer or a positive shut-off valve to reduce water usage Utilize berms to contain wash water and prevent run-off, contain wash water for evaporative drying or percolation The location of any washing areas must be identified on Plan Sheet SWPPP-01 Erosion Control Plan, by the inspector once the location has been determined. Maintenance Requirements Southern Sandoval County Arroyo Flood Control Authority 21

28 At a minimum, inspect once per week sumps, conduct maintenance as needed. Monitor employees and contractors and subcontractors to ensure that proper practices are implemented. 5.5 Storage, Handling, and Disposal of Construction Products, Materials, and Wastes Building Products General Building materials and other construction site wastes must be properly managed and disposed of to reduce the risk of pollution from materials such as surplus or refuse building materials or hazardous wastes. Practices such as trash disposal, recycling, proper material handling, and spill prevention and cleanup measures can reduce the potential for stormwater runoff to mobilize construction site wastes and contaminate surface or ground water. Specific Pollution Prevention Practices Pollution Prevention Practice Description Federal regulations require the removal of all asbestos-containing materials and all hazardous or toxic materials before demolition or renovation of a building begins. All waste dumpsters and roll-off containers will be located in an area where the likelihood of the containers contributing to storm water discharge is negligible. Solid waste containers shall be located no less than 100 feet from any storm inlet, drainage way, or surface water. If required, additional BMPs must be implemented, such as grave bags, wattles, dikes, earthen berms, and silt fence around the base, to prevent waste from contributing to storm water discharge. The location of the waste dumpster and roll-off containers must be identified on Plan SWPPP-01, Erosion Control Plan, by the inspector once the location has been determined. Installation All trash and construction debris from the site will be deposited in the dumpster. Once construction has commenced, the dumpster will emptied a minimum of once per week or when 95% full, or more often if necessary to prevent over-flow, and trash will be hauled to a landfill approved by Rio Rancho, NM. No Construction waste materials will be buried on site. All personal will be instructed regarding the correct procedures for waste disposal Pesticides, Herbicides, Insecticides, Fertilizers, and Landscape Materials General Cover chemicals that might be displaced by rainfall or stormwater, and prevent spills and leaks from hazardous materials that were improperly stored. Specific Pollution Prevention Practices Pollution Prevention Practice Description All landscaping mater Southern Sandoval County Arroyo Flood Control Authority 22

29 Follow all federal, state, and local regulations that apply to the use, handling, or disposal of pesticides and fertilizer. Installation Do not handle the materials any more than necessary. Store pesticides and fertilizers in a dry, covered area. Construct berms or dikes to contain stored pesticides and fertilizers in case of spillage. Follow the recommended application rates and methods. Have equipment and absorbent materials available in storage and application areas to contain and clean up any spills that occur. Maintenance Requirements Inspect and identify storage containers that could malfunction and cause leaks or spills. Ensure waste management practices are being followed; be aware of worker habits and inspect storage areas regularly Diesel Fuel, Oil, Hydraulic Fluids, Other Petroleum Products, and Other Chemicals General Storage of small amounts of chemicals, fluids or fuel may be done using contractors conex or truck for containment. Specific Pollution Prevention Practices Pollution Prevention Practice # 1 Description Chemicals must be in sealed containers and kept in contractor s conex or vehicle. Installation Drip pans or other form of secondary containment will be place under leaky vehicles when parked overnight. Maintenance Requirements Containment must provide sufficient volume to contain expected precipitation and 110% volume of the largest tank. Accumulated rainwater or spills from containment areas are to be promptly pumped into a containment device and disposed of properly by a licensed hazardous waste transporter. Drip pans shall be provided for all dispensers. Any asphalt substances used onsite will be applied according to the manufacturer s recommendations Hazardous Waste Management General Prevent or reduce the discharge of pollutants to storm water from hazardous waste through proper material use, waste disposal, and training of employees and subcontractors. Specific Pollution Prevention Practices Pollution Prevention Practice Description Southern Sandoval County Arroyo Flood Control Authority 23

30 Follow all federal, state, and local regulations that apply to the use, handling, or disposal of hazardous waste. Installation Each employee who must handle a Hazardous Substance will be instructed on the use of the use of MSDS sheets and the specific information in the applicable MSDS for the product he/she is using, particularly regarding spill control techniques. Products will be kept in original containers with the original labels in legible condition. Original labels and MSDSs will be procured and used for each product. If surplus product must be disposed manufacturer s and local/state/federal required methods for proper disposal must be followed. Store containers on pallets under a covered, protected area unless containers are watertight. Locate temporary storage area away from storm drain inlets, drainage facilities or waterways. The location of the hazardous waste management area must be identified on Plan Sheet SWPPP- 01, Erosion Control Plan, by the inspector once the location has been determined. Maintenance Requirements Verify all hazardous waste is properly disposed. Ensure all hazardous waste is properly labeled and stored. Immediately repair all dikes and liners used for storage and containment. Educate employees, contractor, subcontractor in hazardous waste storage and disposal Construction and Domestic Waste General Prevent or reduce the discharge of pollutants to storm water from solid or construction waste by providing designated waste collection areas and containers, arranging for regular disposal, and training employees and subcontractors. Specific Pollution Prevention Practices Pollution Prevention Practice Description All waste materials will be collected and stored in an appropriately covered container and/or securely contained metal dumpster rented from a local waste management company which must be a solid waste management company licensed to do business in Corrales, NM or Sandoval County, NM. The dumpster will comply with all local and state solid waste management regulations. Installation All waste dumpsters and roll-off containers will be located in an area where the likelihood of the containers contributing to storm water discharge is negligible. Solid waste containers shall be located no less than 100 feet from any storm inlet, drainage way, or surface water. If required, additional BMPs must be implemented, such as grave bags, wattles, dikes, earthen berms, and silt fence around the base, to prevent waste from contributing to storm water discharge. The location of the waste dumpster and roll-off containers must be identified on Plan Sheet SWPPP-01, Erosion Control Plan, by the inspector once the location has been determined. Maintenance Requirements All trash and construction debris from the site will be deposited in the dumpster. Once construction has commenced, the dumpster will emptied a minimum of once per week or when Southern Sandoval County Arroyo Flood Control Authority 24

31 95% full, or more often if necessary to prevent over-flow, and trash will be hauled to a landfill approved by SSCAFCA. No Construction waste materials will be buried on site. All personal will be instructed regarding the correct procedures for waste disposal Sanitary Waste General Portable sanitary facilities that store sanitary waste should be emptied periodically, kept clean, and stocked with supplies. Specific Pollution Prevention Practices Pollution Prevention Practice Description Portable sanitary facilities prevent onsite disposal of sanitary waste or illicit discharges. Installation Control or Practice Responsible Party Approx. Installation Date Port-a-John PG Enterprises 04/10/2014 The location of any sanitary facilities must be identified on Plan Sheet SWPPP-01, Erosion Control Plan, by the inspector once the location has been determined. Maintenance Requirements All sanitary waste will be collected from the portable unit a minimum of one time per week by a licensed portable facility provider in complete compliance with local and state regulations. All sanitary waste units will be located in an area where the likelihood of the unit contributing to storm water discharge is negligible. If required, additional BMPs must be implemented, such as grave bags, earthen berms, or specially designed plastic skid container around the base, to prevent waste from contributing to storm water discharge. 5.6 Washing of Applicators and Containers used for Paint, Concrete or Other Materials General Provide effective containment for all liquid and solid wastes generated by washout operations and provide an effective means to eliminate the discharge of these wastes to the site, MS4, or receiving waters. Concrete washout water (or washwater) is slurry containing toxic metals. It s also caustic and corrosive, having a ph near 12. In comparison, Drano liquid drain cleaner has a ph of Caustic washwater can harm fish gills and eyes and interfere with reproduction. Specific Pollution Prevention Practices Pollution Prevention Practice Description Southern Sandoval County Arroyo Flood Control Authority 25

32 Concrete waste management prevents or reduces the discharge of pollutants to storm water be conducting washout offsite, preforming onsite washout in a designated area, and training employees and subcontractors. Locate washout area at least 50 feet from storm drains, open ditches, or water bodies. Prevent runoff from this area by constructing a temporary pit or bermed area large enough for liquid and solid waste. Wash out waste into the temporary pit where the concrete can set, be broken up, and then disposed of properly. REFER TO APPENDIX N Installation Control or Practice Responsible Party Approx. Installation Date Concrete Washout TBD when concrete work begins 5/10/14 The location of any concrete washout areas must be identified on Plan Sheet SWPPP-01, Erosion Control Plan, by the inspector once the location has been determined Maintenance Requirements Inspect subcontractors to ensure that concrete wastes are being properly managed. If using a temporary pit, dispose of hardened concrete on a regular basis. 5.7 Fertilizers General Minimize discharge of fertilizers containing nitrogen or phosphorus. Follow all federal, state, tribal, and local requirements regarding fertilizer application. Specific Pollution Prevention Practices Pollution Prevention Practice Description Once applied, fertilizer will be worked in the soil to limit exposure to storm water. Storage will be in covered shed. Installation Fertilizer, if applicable, will be applied at a rate and in amounts consistent with manufacturer s recommendation with proper spreader equipment. Typical applications rate for grade fertilizer is lb/acre. DO NOT OVER APPLY FERTILIZER. Avoid applying before heavy rains that cause excess nutrients to be discharged. Maintenance Requirements The contents of any partially used bags of fertilizer will be transferred to a sealable plastic bin to avoid spills. Southern Sandoval County Arroyo Flood Control Authority 26