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Home My WebLink AboutHOUSKA AUTOMOTIVE EXPANSION - BDR - BDR150010 - REPORTS - EROSION CONTROL LETTER/REPORT (3)Sediment and Erosion Control Report For Houska Automotive Repair Fort Collins, Colorado Prepared for: D and N Houska Family, Family , LLLLLLLLCCCC c/o Dennis Houska 899 Riverside Drive Fort Collins, Colorado Prepared by: 908 Laporte Avenue Fort Collins, CO 80521 (970) 219-2834 March 30, 2016 1 SECTION 1 -RESPONSIBLE PARTIES AND CONTACT INFORMATION Project/Site Information Project/Site Name: Houska Automotive Repair Project Street/Location: 1005 Riverside Avenue, Colorado Latitude: 40.578497°N Longitude: 105.059622°"W Owner/Developer: Developer Civil Engineer: D and N Houska Family, LLC Apex Engineering 899 Riverside Avenue 908 Laporte Avenue Fort Collins, CO 80524 Fort Collins, CO 80521 (970) 482-0156 (970) 219-2834 Contractor and SWMP Administrator:Administrat or: Company Name: Company Address: Company Telephone: Project Manager/Cell: Site Supervisor/Cell: Emergency SWPPP Contact/Cell: 2 SECTION 2 -EXISTING CONDITIONS AND SITE INFORMATION Nature and Sequence of Construction Activity The proposed land development project is an automotive repair facility consisting of 3 buildings on a 2.28 acre property. The project includes removal and replacement of existing access drives and minor storm drainage relocation, utilities and site improvements such as parking areas, drive aisles, hardscape and landscaping. The project will be constructed in two phases, and is expected to have a duration of approximately 12 months. A detailed sequence of construction and preliminary schedule is included in the appendix. • Estimated Project Start Date: 05/2016 • Estimated Project Completion Date: 05/2017 3 Soils, Slopes, Vegetation and Drainage Patterns The existing surface soils on-site consist of Satanta Loam. These soils are typically set in terraces. These soils are well-drained, with parent material comprised of mixed alluvium and/or eolian deposits. Slopes on the site average 0.5%, falling generally south to north. Existing vegetative cover consists of native plants and weeds. Existing vegetative cover density is approximately 60%, as shown on the aerial photo included above. The site is infill vacant land. There are no known site contamination or environmental features to be protected. The following are estimates of the construction site: • Construction Site Area to be disturbed via grading 2.3 acres • Total Project Area 2.3 acres • Percentage impervious area before construction 0 % • Percentage impervious area after construction 74 % Receiving Waters The project lies within the lower portion of the Old Town Basin. The project site drains to existing storm drainage systems located in Riverside Avenue. These systems drain directly to the Poudre River There are no streams, wetlands or other water bodies on the project site. Site Features and Sensitive Areas The site is simple vacant land with no unique site features such as streams, stream buffers, wetlands, specimen trees, natural vegetation, or steep slopes. There are no sensitive areas within the property limits requiring protection. The site drains to existing storm sewer systems. Potential Sources of Pollution The construction activities include installation of water and sewer services, grading and the construction of parking areas and hardscape. No asphalt concrete batches are planned. Sources of potential pollution and the applicable BMP include: Pollution Source BMP Treatment • Grading to include excavation and fill Silt Fence, Inlet protection, Perimeter Swale, Vegetation • Saw cutting activities Removal of saw cut waste and water • Vehicle tracking of sediments Vehicle Tracking Control • Loading and unloading operations Silt Fence, Inlet protection • Outdoor storage activities Silt Fence, Inlet protection • Vehicle and maintenance and fueling Spill Control Plan 4 • Dust Temporary/Permanent Vegetation, Watering • Concrete truck and equipment washing Concrete Washout Area • Non industrial waste such as worker trash Various Good Housekeeping BMPs and portable toilets There are no contaminated soils identified within the project limits. No asphalt or concrete batch plants shall be placed on the project site. SECTION 3 -EROSION AND SEDIMENT CONTROL BMPS The structural and vegetative BMPs to be implemented to control sediment and pollutants in stormwater discharges include the following: • The installation of a vehicle tracking pads for construction vehicles exiting the site. • Perimeter silt fencing to control overland sediment transport to adjacent properties. • Inlet protection consisting of gravel inlet filters for existing and proposed storm inlets receiving drainage from the project site • The installation of a concrete truck washout pit. • Permanent vegetation such as grass sod and grass seeding. • Good housekeeping BMPs as described in the appropriate section below These BMPS will be inspected bi-weekly and after every rainfall event to determine the condition of the BMPs. An evaluation will be made of the structural integrity of the individual BMPs and the sediment loading on each. Once any BMP receives sediment loading representing one half of the total sediment storage capacity, it will be cleaned out and restored to original condition. Any BMP’s that are found to have failed will be replaced as necessary. All sediment control, erosion control and vegetative stabilization shall be performed in accordance with the current versions of City of Fort Collins Storm Drainage Design Criteria and Construction Specifications and the Urban Storm Drainage Criteria Manual. Volume 3, Best Management Practices. Establish Stabilized Construction Exits A vehicle tracking pad will be installed at the proposed new entrance to the project. This will allow for the removal of accumulated sediment on construction vehicles prior to exiting the site. Sediment tracked onto Riverside Avenue will be swept on an as-needed basis as determined by the City erosion control inspector. Any sediment tracked onto Riverside will drain towards the adjacent proposed inlets, where gravel inlet filters will be placed. 5 Establish Perimeter Controls and Sediment Barriers Perimeter silt fencing will be installed on all sides of the property. These areas receive little flow from the site, and will serve primarily to collect small amount of sediment and establish the limit of disturbance in these areas. Protect Storm Drain Inlets There are 2 new inlets in Riverside and two existing inlets on the property immediately to the west that will receive stormwater runoff during construction. The two existing inlets will have gravel filters installed prior to construction. The two proposed inlets will have gravel inlet filters install immediately after construction. All gravel filters remain in-place until the contributing drainage areas are stabilized. Stabilize Stabil ize Soils The majority of the proposed project consists of buildings, parking lot and associated hardscape. As such, much of the project area will be stabilized with structure. Other portions of the site will be stabilized using landscape material such as trees, shrubs and mulch. The balance of the disturbed area will be stabilized with seeding once construction is complete. Formal landscape areas will be stabilized with trees, shrubs and landscape mulch in accordance with the Landscape Plan for the project. The balance of the vegetated areas will be permanently stabilized with seed and mulch, as follows: • Sideoats Grama 2.8 PLS/acre • Buffalograss 6.2 PLS/acre • Blue Grama 0.6 PLS/acre • Inland Saltgrass 0.9 PLS/acre • Bottlebrush Squirreltail 1.8 PLS/acre • Prairie Junegrass 0.2 PLS/acre • Wester Wheatgrass 3.2 PLS/acre • Alkali Sacaton 0.3 PLS/acre Areas for vegetative stabilization shall be provided with 4” of topsoil which over subgrade which has been scarified to a depth of 8”. Top soil material, amendments and placement shall meet the requirements of Section 12-130-132 of the Fort Collins Municipal Code. Seed shall be distributed evenly over disturbed areas at the rates shown. Seed shall be sown using a mechanical type 3 drill. Irrigation shall be provided as necessary by the contractor. Mulch will be applied immediately after seeding. Grass hay or straw will be anchored to the soil by a crimper that will crimp the fiber four inches or more into the soil or mulch netting installed according the manufacturer’s instructions. Areas of soil to remain bare for more than 30 days shall be reseeded with a temporary seed mix, as depicted blow. Top soils for seeded areas shall be fertile, friable, sandy loan or loam, free from stones and noxious weeds. Soil shall be amended with100% humus organic matter in accordance with the Criteria.. Annual ryegrass is to be drilled at 20 lbs seed per 6 acre and hybrid sudan grass is to be drilled at 15 lbs seed per acre depending on the time of seeding, as follows: Seeding Season Seed Type Jan - Feb do not seed Mar - May 15 annual ryegrass May 16 - May 31 hybrid sudan grass June - July hybrid sudan grass Aug - Sep annual ryegrass Oct - Dec do not seed Final stabilization is reached when all ground surface disturbing activities at the site have been completed, and uniform vegetative cover has been established with a vegetative plant density of a least 70% of pre-disturbance levels, or equivalent permanent, physical erosion reduction methods have been employed. SECTION SEC TION 4 -GOOD HOUSEKEEPING BMPS Management of Soils and Waste Trash and waste products will be removed as needed during construction. Waste material shall not be stored on site nor shall it be buried on site. There are no known contaminated soils currently on the project site. A temporary soil stockpile is provided. This stockpile will be used for temporary storage of topsoil strippings and other material to be reused during the project. It is not anticipated that a large stockpile area will be needed since waste soil will be minimal. Non-industrial waste such as trash and miscellaneous debris will be collected in trash receptacles for removal and disposal. No debris shall be allowed to accumulate in any area except trash receptacles suitable for the waste material. Loose trash shall be collected on a daily basis and the site shall be kept in an orderly state. Management of Building Material Storage and Delivery The project will require material such as pipe, manholes, drainage structures, and building materials. These materials will generally be delivered to the appropriate area of the project site where needed. Longer term storage of construction materials will be located within the area protected by the BMP’s discussed. Parking for construction personnel will be on the existing adjacent Houska Automotive facility. All construction traffic exiting the site will pass through the stabilized construction exit discussed above. Management of Vehicle Fueling and Maintenance There will be no vehicle fuel storage on site. It is not expected that major vehicle maintenance or fueling activities will be needed on site. On-site vehicle repair and minor maintenance will be performed within areas protected by the BMPs discussed. Care shall be taken to place containers under any operations involving fluids such as fuel, oil, grease, 7 hydraulic fluid, or other hazardous substances for collection and immediate removal from the site. Dust Control Dust may be created during the earthmoving and grading operations. Dust exceeding acceptable levels will be mitigated as needed with watering or other acceptable methods. Spill Prevention and Control Plan Spill control procedures shall be implemented anytime chemicals and/or hazardous substances are stored. Substances may include, but are not limited to, the following: • Soil stabilizers/binders • Dusts • Herbicides • Growth inhibiters • Fertilizers • De-icing chemicals • Fuels or other petroleum distillates • Paints • Lubricants All hazardous or MSDS material shall be used and stored in accordance with the appropriate manufacture’s recommendations. Spill prevention plan/supplies will be located on-site. Spill control responsibility shall be the responsibility of the contractor. Groundwater and Dewatering The proposed buildings will be slab-on-grade. A geotechnical investigation provided by Terracon indicates groundwater is well below the lowest planned excavation. However, if groundwater is experienced, groundwater will be mitigated by the contractor in accordance with State and local requirements. SECTION 5 -INSPECTIONS and MAINTENANCE Inspections Regular inspections will be conducted by the contractor on a bi-weekly basis. Inspections will also be held after each significant (greater than 0.2 inches) rainfall event. These inspections will include all BMPs proposed for the project. The Contractor shall assign competent, qualified personnel to conduct the inspections. Maintenance of Controls Any BMP found to be damaged will be repaired or replaced within two days. BMP’s which are over half full of sediment (measured by volume) will be cleaned out and the material will be incorporated into on-site fill or taken off-site for disposal. 8 Corrective Action Log Repair, replacement and maintenance of BMPs undertaken will be logged. A proposed Corrective Action Log is included in the appendix. SECTION 6 -RRRREEEECCCCOOOORRRRDDDDKKKKEEEEEEEEPPPPIIIINNNNGGGG Recordkeeping The following records will be kept the project site available for inspectors to review: Dates of grading, construction activity, and stabilization A copy of the construction general permit Inspection reports Corrective action reports Log of Changes to the SWPPP Changes to the SWPPP such as additions of new BMPs, replacement of failed BMPs, significant changes in the activities or timing of the project, changes in personnel, changes in inspections and maintenance procedures, and updates to maps will be logged. A proposed Log of Changes to the SWPPP is included in the appendix. 9 SWPPP APPENDICES • Vicinity Map • Inspection Reporting Form • Corrective Action Log • Erosion Control Cost Estimate • Sediment and Erosion Control Plan 10 SSSSIIIITTTTEEEE VVVViiiicccciiiinnnniiiity ty Map, NTS 11 12 CORRECTIVE ACTION REPORT – HOUSKA AUTOMOTIVE REPAIR DATE: CORRECTIVE ACTION REQUIRED: CORRECTIVE ACTION TAKEN: CORRECTIVE ACTION BY: 13