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Quaker SWPPP STORMWATER POLLUTION PREVENTION PLAN for the construction of Rad'is at 773 Quaker Road Town of Queensbury, Warren County, New York Prepared For Fastrac Markets 6500 New Venture Gear Drive East Syracuse, NY 13057 Prepared by ON AP I E KALA CONSULTING PROFESSIONAL ENGINEER,P.C. SITE • DESIGN • ENGINEERING 110 FAYETTE STREET NI ANLIUs NEw YOxK 13104 Telephone: (315) 682-5580 Fax: (315) 682-5544 February 15, 2017 Fastrac Cafe 773 Quaker Road, Town of Queensbury Page i Table of Contents SectionI Scope..............................................................................................................................................................1 A. Purpose.............................................................................................................................................................1 B. SPDES General Permit(GP-0-15-002)............................................................................................................1 C. Responsibilities of the Owner...........................................................................................................................1 D. Responsibilities of the Contractor....................................................................................................................1 E. Notice of Intent.................................................................................................................................................2 F. Stormwater Inspections....................................................................................................................................2 G. SWPPP Modifications......................................................................................................................................3 H. Final Stabilization and Termination of Permit Coverage.................................................................................3 SectionII Site Description.............................................................................................................................................4 A. Project Name and Location..............................................................................................................................4 B. Owner/Operator Name and Address.................................................................................................................4 C. Project Description...........................................................................................................................................5 D. Receiving Waters..............................................................................................................................................8 E. Endangered or Threatened Species...................................................................................................................8 F. Federal and State Historic Preservation..........................................................................................................10 Section III Erosion and Sediment Controls.................................................................................................................10 A. Erosion Control Planning and Site Management............................................................................................10 B. Permanent Runoff Control..............................................................................................................................13 C. Temporary Soil Stabilization Control.............................................................................................................15 D. Permanent Soil Stabilization Control.............................................................................................................15 E. Sequence of Major Activities.........................................................................................................................18 SectionIV Stormwater Management...........................................................................................................................19 A. Methodology ..................................................................................................................................................19 B. Existing Conditions........................................................................................................................................21 C. Proposed Conditions.......................................................................................................................................24 D. Water Quantity...............................................................................................................................................27 E. Water Quality Volume Treatment..................................................................................................................28 Section V Inspection and Maintenance Requirements................................................................................................28 A. Construction Maintenance/Inspection Procedures..........................................................................................28 Section VI Materials Management Plan......................................................................................................................31 A. Materials Covered..........................................................................................................................................31 B. Material Management Practices.....................................................................................................................31 C. Spill Prevention and Response Procedures.....................................................................................................32 D. Control of Non-Stormwater Discharges.........................................................................................................33 Section VII Certification and Notification...................................................................................................................34 Fastrac Cafe 773 Quaker Road, Town of Queensbury Page ii List of Figures Figure 1: Site Location(source: Google Earth)..........................................................................................................4 Figure2: USGS Topographic Map Excerpt..................................................................................................................5 Figure 3: Existing Condition Aerial Photograph(source:NYSGIS).............................................................................6 Figure4: Proposed Site Layout Plan............................................................................................................................7 Figure 5: NYSDEC Stormwater Interactive Map.........................................................................................................8 Figure 6: DEC Environmental Resource Mapper.........................................................................................................9 Figure7: NYS SHiPO Mapping.................................................................................................................................10 Figure8: Concrete Washout Area..............................................................................................................................11 Figure 9: Stabilized Construction Access...................................................................................................................12 Figure 10: New York State One-Year Design Stone Map.........................................................................................20 Figure 11: New York State 10-Year Design Stone Map............................................................................................20 Figure 12: New York State 100-Year Design Storm..................................................................................................21 Figure 13: Existing Condition Drainage Area Mapping.............................................................................................22 Figure 14: Proposed Condition Drainage Area Map..................................................................................................25 Figure 15: Proposed Site/Grading Plan......................................................................................................................26 List of Tables Table 1: Soil Restoration Requirements.....................................................................................................................16 Table2: Topsoil Application Depth...........................................................................................................................18 Table3: Rainfall Data.................................................................................................................................................19 Table 4: Existing Conditions Towards Dix Avenue...................................................................................................23 Table 5: Existing Conditions Towards Quaker Road.................................................................................................23 Table 6: Existing Conditions Towards the North.......................................................................................................23 Table 7: Proposed Conditions Towards Dix Avenue..................................................................................................24 Table 8: Proposed Conditions Towards Quaker Road................................................................................................24 Table 9: Proposed Conditions to the North................................................................................................................27 Table 10: Water Quantity Calculations......................................................................................................................28 List of Appendices Appendix A: SHiPO Correspondence Appendix B: NRCS Soil Mapping Appendix C: HydroCAD Output-Existing Conditions Appendix D: HydroCAD Output-Proposed Conditions Appendix E: Notice of Intent Fastrac Cafe 773 Quaker Road, Town of Queensbury Page I SECTION I SCOPE A. PURPOSE Napierala Consulting, Professional Engineer, P.C., has prepared this Stormwater Pollution Prevention Plan (SWPPP) in compliance with the New York State Department of Environmental Conservation (NYSDEC) State Pollutant Discharge Elimination System (SPDES) General Permit for Stormwater Discharges from Construction Activity. The contractor's participation and adherence to this plan is mandatory. Non- compliance with the plan is subject to various remedies including, without limitation, monetary set-offs, withholding payments; reimbursement for costs, expenses (including reasonable attorney's fees), fines, and civil penalties incurred; and/or liquidated damages. This section provides a descriptive explanation of the Stormwater Pollution Prevention Plan and required contractor participation. B. SPDES GENERAL PERMIT(GP-0-15-002) The New York State Department of Environmental Conservation enacted regulations that require permitting for the discharge of stormwater from construction activities on sites where an area of one acre or more of soil disturbance is proposed. In order to comply with these regulations, the developer of the site must request coverage under the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-15-002). In order to obtain coverage under the General Permit,a SWPPP for the site must be prepared following the requirements of the New York State Standards and Specifications for Erosion and Sediment Control and the New York State Stormwater Management Design Manual. The NOI, the SWPPP, and any amendments to the SWPPP, as well as any reports required by the SPDES General Permit for Stormwater Discharges from Construction Activity,must also be submitted concurrently to the local governing body,if required,and any other authorized agency having jurisdiction or regulatory control over the construction project. C. RESPONSIBILITIES OF THE OWNER The owner/operator shall identify the contractor(s) and subcontractor(s)that will be responsible for installing, constructing, repairing, replacing, inspecting and maintaining the erosion and sediment control practices included in the SWPPP. The owner/operator shall identify the contractor(s) and subcontractor(s) that will be responsible for constructing the post-construction stormwater management practices included in the SWPPP. The owner/operator shall have each of the contractors and subcontractors identify at least one person from their company that will be responsible for implementation of the SWPPP. The owner/operator shall ensure that at least one trained contractor is on site on a daily basis when soil disturbance activities are being performed. The owner/operator shall have a qualified inspector conduct site inspections. D. RESPONSIBILITIES OF THE CONTRACTOR The contractor shall manage the discharge of stormwater from the site in accordance with the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity. The contractor shall be responsible for installing and maintaining the stormwater management practices in accordance with the permit. The contractor is responsible for having at least one person onsite during construction activity that has taken the DEC erosion and sediment control class. The owner/operator and contractor shall be responsible for any enforcement action federal, state, or local agencies take or impose, including the cost of fines, construction delays, and remedial actions resulting from the contractor's failure to comply with the permit provisions. It shall be the responsibility of the contractor to make any changes to the SWPPP necessary when the contractor or any of his subcontractors elects to use borrow,fill or material storage sites, either contiguous to or remote from the construction site, when such sites are used solely for this construction project. Such sites are considered to be part of the construction site that the permit and this SWPPP cover. Off-site borrow, fill, or material storage sites which are used for multiple construction projects are not subject to this requirement, unless state or local regulations specifically require that the SWPPP include such sites. The contractor should consider this requirement in negotiating with earthwork subcontractors since the choice of an Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 2 off-site borrow, fill, or material storage site may impact their duty to implement, makes changes to, and perform inspections the SWPPP for the site requires. The SWPPP provides forms for both the general contractor and subcontractor(s) that indentify the company name, business address and telephone number along with the responsible person for the contractor and all subcontractors who will implement the measures identified in the SWPPP. The general contractor shall sign the "General Contractor's Certification" and all subcontractors shall sign the "Subcontractor's Certification", verifying they have been instructed on how to comply with and fully understand the requirements of the NYSDEC and SWPPP. A fully qualified individual on behalf of each entity must sign this certification prior to the beginning of any construction activities and the certification shall be filed in the project's SWPPP. The SWPPP is meant to be a working document that shall be maintained at the site of the construction activities at all times throughout the project,shall be readily available upon the operator's personnel,NYSDEC or any other agency with regulatory authority over stormwater issues requests to review the SWPPP,and shall be kept on-site until the site complies with the Final Stabilization section of this document. A sign or other notice must be posted near the main entrance of the construction site which contains a completed NOI, the location of the SWPPP and the name and phone number of a contact person responsible for scheduling SWPPP viewing times,and any other state specific requirements. E. NOTICE OF INTENT The operator will [has]petition[ed]the NYSDEC for the stormwater discharges during construction at this site to be covered by the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity. The owner/operator will be filing [has filed] a Notice of Intent (NOI) to be covered under this permit. The signatory on the NOI must sign all documents (i.e., inspection reports) associated with the SWPPP. If the signatory chooses not to sign all documents,he/she must designate a duly authorized representative to sign all relevant documents. This designation must be made in writing and be included in the SWPPP. The duly authorized representative may be either a named individual or any individual occupying a named position. Additionally,the written designation must be submitted to the NYSDEC. F. STORMWATER INSPECTIONS 1. Inspection Procedures Inspections of the erosion control practices are required on a routine basis. A qualified professional shall perform these inspections once a week. All inspections will continue until the site complies with the final stabilization section of this document. "Qualified Professional" means a person knowledgeable in the principles and practices of erosion and sediment controls, such as a licensed Professional Engineer(PE), Certified Professional in Erosion and Sediment Control(CPESC),or soil scientist. A report documenting the inspector's findings shall follow the inspection; the report shall document the required maintenance and/or repair for the erosion and sedimentation control measures. It is imperative that the contractor documents the inspection and maintenance of all erosion and sedimentation control measures as soon as possible after the inspection and/or maintenance have been completed. These records are used to prove that the required inspection and maintenance were performed. The records shall be placed in the SWPPP. In addition to inspection and maintenance reports, records should be kept of the construction activities that occur on the site. The operator shall post at the site, in a publicly-accessible location,a summary of the site inspection activities on a monthly basis. 2. Record Keeping The operator shall also prepare a written summary of its status with respect to compliance with this general permit at a minimum frequency of every three months during which coverage under the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity exists. The summary should address the status of achieving each component of the SWPPP. The reports shall be signed by the signatory of the NOI or a duly-authorized person and be retained at the construction site. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 3 The contractor shall retain copies of the SWPPP,all reports and data for a minimum of five(5)years after the project. The following list identifies the required inspection and maintenance documentation that must be maintained by the contractor under this SWPPP: • Inspection Report • Stabilization Schedule • Implementation Schedule Status Report • Project Rainfall Log G. SWPPP MODIFICATIONS The inspection report should also identify if any revisions to the SWPPP are warranted due to unexpected conditions. The SWPPP is meant to be a dynamic working document that is to be kept current and amended whenever: • The NYSDEC provides notification that the SWPPP does not comply with the minimum permit requirements. • The design, construction, operation, or maintenance of the site changes in a way which significantly affects the potential for the discharge of pollutants or when the plan proves to be ineffective in eliminating or significantly minimized pollutant discharges. • Within seven(7)calendar days of knowledge of a reportable release. Any such changes to the SWPPP must be made in writing within seven(7)days of the date such modification or amendment is made. The contractor's failure to monitor or report deficiencies to the operator will result in the contractor being liable for fines and construction delays resulting from any federal, state, or local agency enforcement action. H. FINAL STABILIZATION AND TERMINATION OF PERMIT COVERAGE A site can be considered stabilized when all soil disturbing activities have been completed and a uniform perennial vegetative cover with a density of 80%over the unpaved areas and areas not covered by permanent structures has been established or equivalent permanent stabilization measures have been established and the facility no longer discharges stormwater associated with construction activities, and the operator(s)has filed a Notice of Termination (NOT) form with the NYSDEC. Prior to filing of the Notice of Termination, the operator shall have the qualified professional perform a final site inspection. The qualified professional shall certify that the site has undergone final stabilization using either vegetative or structural stabilization methods and that all temporary erosion and sediment controls (such as silt fence) not needed for long-term erosion control have been removed. The filing of the NOT terminates coverage under the General Permit and terminates the contractor's responsibility to implement the SWPPP, but the requirements of the SWPPP, including periodic inspections, must be continued until the NOT is filed. Upon achieving this milestone, the contractor shall also submit "Final Stabilization Certification/Termination Checklist". Final payment and/or the release of retainage will be withheld until all provisions of the SWPPP have been submitted,completed and accepted by the operator. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 4 SECTION II SITE DESCRIPTION A. PROJECT NAME AND LOCATION Fastrac Caf6 773 Quaker Road Tax Parcel 303.15-1-27 Town of Queensbury,Warren County UTM Coordinates from NYSDEC Interactive Map: E: 612600;N: 4796859 ""- Walmart #t f Quaker Road Project Location Joy K-M J s i � A Ar t 4' %• Dix Avenue ) _ l �i' a . - �_ Y; •A- 4-. Figure 1: Site Location(source: Google Earth) B. OWNER/OPERATOR NAME AND ADDRESS Fastrac Markets,LLC 6500 New Venture Gear Drive East Syracuse,NY 13057 Construction Contact: Jason Baleno Phone: (607)335-9506 Fastrac Cafe 773 Quaker Road, Town of Queensbury Page S C. PROJECT DESCRIPTION The existing parcel of land is approximately 7.38 acres of commercially developed land located at the intersection of Quaker Road and Dix Avenue. The existing site occupies an additional 0.08 acre of the public right-of-way along Quaker Road as part of the site parking lot. The site is currently a floral shop and garden center that includes a main building, numerous greenhouses, gravel storage/display areas, a parking lot, and some minor pervious areas. The total impervious area, including paved parking areas within the public right- of-way and gravel storage/display areas, is approximately 4.65 acres (62% of the site area). The site has a gentle to mild slope. The site generally drains in a southerly direction towards the public roads. The proposed project includes the removal of all of the greenhouses (22 in total), the demolition of main building and greenhouse foundations, and the demolition of the existing asphalt areas. Impervious areas that are within the footprint of either the new building or new asphalt areas will be proof-rolled and/or re-graded to meet the new site grades after demolition. Existing impervious areas that are within proposed pervious areas will undergo a decompaction process in order to return the soils to a more native state. Once the site has been prepped, construction of the new building and asphalt areas can begin. The new store will be a one-story, 5,800 square-foot building. The new site also includes eight gasoline fueling pump islands and three diesel fueling pump islands. The site work includes the construction of a 31-vehicle parking lot,an onsite wastewater treatment/disposal system(septic tank and leach field), and connection to available utilities (water,gas,electric and communications). O �� ' �.1 D -4 1 � � I d S 54 c Project 5ain[ o G Lo ` Pauls Q .•C❑_.Rp 92 � 1. C D ! Uy VAS 4 e•CC11tal M LAFAYETT9 ST lls{Fee"de_ u -- l" L4 CROSS ST GLENS FALLS C` 'a 3 � 32 z o 254 { r2sVp� ❑ l ou - 3 K 0. �. _k5 ..- �jf CECt�(1T�,H11UC 1 1-; � FERRY ST , Co � 254 C, 0 AiM gY Fniinor`e r f a� l C1 N. o r Figure 2: USGS Topographic Map Excerpt Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 6 IT— �� 1 ir �.+ � r is # n i Jr,A%Ap j F A T oil d i re Figure 3: Existing Condition Aerial Photograph(source:NYSGIS) ■ Y 4 3a,40"E 30,,. ■ � a � z7o.92 / Sg os p9 / / f .ti � r— k 56,32 494 261 — 1.4, i"".Vja SV 12"e e J \ � d S\ / A � 40 r / AL / / / / ,1 l Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 8 The project will disturb approximately six acres of the site, 4.65 acres of which is impervious in the existing condition. Within the disturbed area, 2.8 acres will be impervious area and 3.2 acres will be pervious areas. The 1.9-acre reduction in impervious area(4.65 acres existing to 2.8 acres proposed)is a 39%reduction from the existing conditions. The project is located in Region 5 of the New York State Department of Environmental Conservation. Portions of the Town of Queensbury are within the DEC's Automatic Regulated MS4;while the project site is located outside the boundaries of the MS4 area, the Town of Queensbury will [has] review[ed] this SWPPP and all stormwater-related aspects of the project. �� Search I Layers&Legentl Tell Me More... {- �117,,E LO r p i z� L �g EA Stamiwsto'Permit C-tack Help ��o y.. 1�5+y"{I II �+s it ILII I��C_{/3� ' Map Layers&Legend ^ rr r Scroll tlowntoreo-ilayers ❑ Permits ❑ Gombinetl Se Overflow ` S .1 10 © N State&us Highways 1.'� i• o o d ❑ Watershed Improvement roveent Strategy Area 254m } b ❑ Long od La Project Site ® GrCr Shellfish Watersheds Proj •I7 F- - r eenwoetl Lake ® NYC EOh Watershed eour�.am :, __ •__ '+�, 50C E5 ® Onondaga Lake X {r�1.f ® Oseawana Lake �1 io^r� - ® Oyster Bay ® Pedenic Nltregen �{{1� EENsaunv ® Pecenic Pathogen e Regulated as atetlMs " ' f r_' i, " cn y r flys 612562,496650 -1 Perk Automatic 5 ' Feld •Radio R Designation 2003 Palk .` o4ae' • -� ❑ Designation 2008 1 }v •, .sZ'rt l ❑ Designation 2010 3 D NS Jur k.Yard x X11 T' _ c�Ly B FEEDER r 1 SAI LS v - 3t -__-_-- < , IV 1 d ■ t `r ' A ►+297 FALL nuosary Taus Ifvoabcf etlwt tha bcatnn of voiir fac•lhvlornectorothar informefba's taccurate. Rya may contact the Ganeral ParmA Sact'nnto fntl out hm fo submtl mrrc�tbrvs'• Figure 5: NYSDEC Stormwater Interactive Map D. RECEIVING WATERS Runoff from the project site generally flows in a southerly direction towards Quaker Road and/or Dix Avenue. Road-side drainage continues in a southerly direction. The nearest downstream surface water is the Glens Falls Feeder Canal,which eventually discharges into the Hudson River. The NYS DEC Environmental Resource Mapper shows that no DEC-regulated wetlands are within the immediate vicinity of the project site. The boundary of the State Regulated Wetland Checkzone is over 300 feet to the northeast of the project's property lines. The National Wetland Inventory Map also shows no regulated wetlands within the immediate vicinity. E. ENDANGERED OR THREATENED SPECIES The NYSDEC Environmental Resource Mapper does not identify the site as containing any rare plants or animals or any significant natural communities. The US Fish&Wildlife Service identifies the Northern Long-Eared Bat,the Indiana bat, and the Karver blue butterfly as species of concern within Warren County (best available data;USFWS does not provide location- by-location data). The Northern Long-Eared Bat is listed as threatened while the Indiana bat and Karver blue butterfly are endangered. To identify potential impacts that the project may have on these species,information r Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 9 NEW YORK STATE DEPARTMENT OF ENVIRONMENTAL CONSERVATION Environmental Resource Mapper Search Tools + Layers and Legend LI All Layers lJ*Unique Geological Features x lJ WaterbodyClassifications for Rivers/Streams 0 lJ Waterboq Classifications for Lakes lJ❑State Regulated Fmshwater Wetlands PROJECT SI ❑State Regulated Wetland ChecLmne ® - lJ❑Significant Natural Communities ' ❑Natural Communities Near This LocaLun 8 ' lJ❑Rare Plants and Rare Animals 3: Figure 6: DEC Environmental Resource Mapper regarding the habitat of each species was researched to determine if the project site was a viable location for each. During summer months,Northern Long-Eared Bats roost singly or in colonies underneath bark,in cavities, or in crevices of both live and dead trees. Males and non-reproductive females may also roost in cooler places, like caves and mines. This bat seems opportunistic in selecting roosts,using tree species based on suitability to retain bark or provide cavities or crevices. It has also been found,rarely,roosting in structures like barns and sheds. Feeding grounds tend to be the understory of forested areas. Northern long-eared bats spend winter hibernating in caves and mines. They typically use large caves or mines with large passages and entrances, constant temperatures, and high humidity with no air currents! Given these habitat requirements for roosting, feeding,and hibernating and that the project site is an existing developed site, it is not likely that the Northern Long-Eared Bat will be found on site. The Indiana bat lives in wooded or semi-wooded areas in the summer time. Indiana bats forage along river and lake shorelines, in the crowns of trees in floodplain and in upland forests. It hibernates in limestone caves from mid-autumn to early spring. 2 As with the Northern Long-Eared Bat, the existing project site does not contain the appropriate habitat for either roosting, feeding, or hibernating. Therefore, it is not likely that the proposed project will impact the Indiana bat. The Kamer blue butterflies have a very limited habitat. The Kamer blue caterpillar only feeds on the leaves of the wild lupine plant. As such, they are only found within the range of wild lupine. Wild lupine is found primarily on dry, sandy soils in open to partially shaded habitats. Many of the areas where the lupine grows are oak savanna and pine barrens plant communities.' As with the two bat species, the project site is not suitable habitat for wild lupine or the Kamer blue butterfly and it is unlikely that the proposed project will have an impact on either. 'U.S.Fish and Wildlife Service,Northern Long-Eared Bat Fact Sheet,April 2015. 2 U.S.Fish and Wildlife Service,Indiana bat Fact Sheet,July 2004. 'U.S.Fish and Wildlife Service,Kamer Blue Butterfly Fact Sheet,January 2008. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 10 F. FEDERAL AND STATE HISTORIC PRESERVATION The project site is located within an archeo-sensitive area according to the NYS SHiPO GIS mapping. A project consultation was submitted to SHiPO to determine if the project will impact archeological resources. SHiPO has determined that it will not and a letter of no effect is provided in Appendix CRS- C�o i LLS HOME o SUBMIT SEARCH COMMUNICATE a. 14 „..m IN Project Site i ■■ ■ 5 � sF Figure 7: NYS SHiPO Mapping SECTION III EROSION AND SEDIMENT CONTROLS Prior to the commencement of construction, the operator will identify the contractor(s) and subcontractor(s) that will implement each erosion and sediment control measure identified in this SWPPP. All contractors and subcontractors identified in the SWPPP must sign a copy of the certification statement in Part III.E. of the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity in accordance with Part V.H.of the SPDES General Permit. A. EROSION CONTROL PLANNING AND SITE MANAGEMENT 1. Concrete Truck Washout: A temporary excavated or above ground lined constructed pit where concrete truck mixers and equipment can be washed after their loads have been discharged to prevent highly alkaline runoff from entering storm drainage systems or leaching into soil. a. The washout facility is sized to contain solids,wash water,and rainfall. The minimum size shall be eight feet by eight feet at the bottom and two feet deep. If excavated,then the side slopes shall be 2:1 (horizontal to vertical). b. The facility shall be located a minimum of 100 feet from drainage swales, storm drain inlets, wetlands, streams, and other surface waters. Surface water shall be prevented from entering the structure except for the access road. Appropriate access shall be provided with a gravel access road sloped down to the structure. Signs shall be placed to direct drivers to the facility after their load is discharged. Fastrac Cafe 773 Quaker Road, Town of Queensbury e•, Page 11 SIGN TO INDICATE LOCATION OF WASHOUT AREA BERM TO SURROUND PERIMETER GROUND SURFACE h? 12"MIN Kz N 8'XW MIN OR AS REQUIRED TO CONTAIN WASTE CONCRETE Figure 8: Concrete Washout Area C. All washout facilities will be lined to prevent leaching of liquids into the ground. The liner shall be plastic sheeting with a minimum thickness of 10 mils with no holes or tears, and anchored beyond the top of the pit with an earthen berm, sand bags, stone, or other structural appurtenance except at the access point. 2. Dust Control: The control of dust resulting from land-disturbing activities is required in order to prevent surface and air movement of dust from disturbed soil surfaces that may cause off-site damage,health hazards,and traffic safety concerns. a. Non-driving areas - These areas shall use products and materials applied or placed on soil surfaces to prevent airborne migration of soil particles. i. Vegetative Cover - For disturbed areas not subject to traffic, vegetation provided the most practical method of dust control. ii. Mulch (including gravel mulch) - Mulch offers a fast effective means of controlling dust. This can also include rolled erosion control blankets. b. Driving areas - These areas utilize water and barriers to prevent dust movement from the traffic surface into the air. i. Sprinkling - The site may be sprayed with water until the surface is wet. This is especially effective on haul roads and access routes to provide short term limited dust control. ii. Barriers-Woven geotextiles can be placed on the driving surface to effectively reduce dust throw and particle migration on haul roads. Stone can also be used for construction roads for effective dust control. C. Windbreak-A silt fence or similar barrier can control air currents at intervals equal to ten times the barrier height. Preserve existing wind barrier vegetation as much as practical. 3. Site Pollution Prevention: A collection of management practices intended to control non-sediment pollutants associated with construction activities to prevent the generation of pollutants due to improper handling,storage,and spills and prevent the movement of toxic substances from the site into surface waters. a. All state and federal regulations shall be followed for the storage,handling, application,usage, and disposal of pesticides,fertilizers,and petroleum products. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 12 b. Vehicle and construction equipment staging and maintenance areas will be located away from all drainage ways with their parking areas graded so the runoff from these areas is collected, contained and treated prior to discharge from the site. C. Provide sanitary facilities for on-site personnel. d. Store,cover,and isolate construction materials,including topsoil and chemicals,to prevent runoff of pollutants and contamination of groundwater and surface waters. C. Develop and implement a spill prevention and control plan. f. Provide adequate disposal for solid waste including woody debris, stumps, and other construction waste. Fill,woody debris, stumps,and construction waste shall not be placed in regulated wetlands, streams,or other surface waters. g. Distribute or post informational material regarding proper handling, spill response,spill kit location, and emergency actions to be taken,to all construction personnel. h. Refueling equipment shall be located at least 100 feet from all wetlands, streams and other surface waters. 4. Stabilized construction access: 50' A stabilized pad of aggregate underlain with geotextile located at any point where traffic will be entering or leaving a construction site to or from a s'MIN RLTER CLOTH public right-of-way, street, alley, sidewalk, or parking area. The purpose of stabilized construction 50' MIN access is to reduce or eliminate the tracking of � sediment onto public rights-of-way or streets. a. Aggregate size: Use a matrix of one-to four- MIH' inch stone, or reclaimed or recycled equivalent. b. Thickness: Not less than six inches. Figure 9: Stabilized Construction Access C. Width: 24-foot minimum. d. Length: As required,but not less than 50 feet. C. Geotextile: To be placed over the entire area to be covered with aggregate. Piping of surface water under entrance shall be provided as required. 5. Winter Stabilization: A temporary site specific, enhanced erosion and sediment control plan to manage runoff and sediment at the site during construction activities in the winter months to protect off-site water resources. Winter stabilization applies to all construction activities involved with ongoing land disturbance and exposure between November 15th to the following April 1 st. a. Prepare a snow management plan with adequate storage for snow and control of melt water, required cleared snow to be stored in a manner not affecting ongoing construction activities. b. Enlarge and stabilize access points to provide for snow management and stockpiling. Snow management activities must not destroy or degrade installed erosion and sediment control practices. C. A minimum 25-foot buffer shall be maintained from all perimeter controls such as silt fence. Mark silt fence with tall stakes that are visible above the snow pack. d. Edges of disturbed areas that drain to a waterbody within 100 feet will have 2 rows of silt fence, 5 feet apart,installed on the contour. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 13 C. Drainage structures must be kept open and free of snow and ice dams. All debris, ice dams, or debris from plowing operations,that restrict the flow of runoff and meltwater,shall be removed. f. Sediment barriers must be installed at all appropriate perimeter and sensitive locations. Silt fence and other practices requiring earth disturbance must be installed before the ground freezes. g. Soil stockpiles must be protected by the use of established vegetation, anchored straw mulch,rolled stabilization matting,or other durable covering. A barrier must be installed at least 15 feet from the toe of the stockpile to prevent soil migration and to capture loose soil. h. All slopes must be stabilized as soon as practicable but in no case left unprotected for more than three days. Rolled erosion control blankets must be used on all slopes 3 horizontal to 1 vertical or steeper. i. If straw mulch alone is used for temporary stabilization, it shall be applied at double the standard rate of 2 tons per acre, making the application rate 4 tons per acre. Other manufactured mulches should be applied at double the manufacturer's recommended rate. j. To ensure cover of disturbed soil in advance of a melt event, areas of disturbed soil must be stabilized at the end of each work day unless: i. work will resume with 24 hours in the same area and no precipitation is forecast or; ii. the work is in disturbed areas that collect and retain runoff, such as open utility trenches,foundation excavations,or water management areas. k. Use stone to stabilize perimeters of buildings under construction and areas where construction vehicle traffic is anticipated. Stone paths should be a minimum 10 feet in width but wider as necessary to accommodate equipment. B. PERMANENT RUNOFF CONTROL 1. Subsurface Drain(if required) A permanent conduit, such as tile,pipe,or tubing,installed beneath the ground surface,which intercepts, collects,and/or conveys drainage water to serve one or more of the following purposes: • Improve the environment for vegetative growth by regulating the water table and groundwater flow. • Intercept and prevent water movement into a wet area. • Relieve artesian pressures. • Remove surface runoff. • Provide internal drainage of slopes to improve their stability and reduce erosion. • Provide internal drainage behind bulkheads,retaining walls,etc. • Replace existing subsurface drains that are interrupted or destroyed by construction operations. • Provide subsurface drainage for dry storm water management structures. • Improve dewatering of sediment in sediment basins. a. Size of Subsurface Drain: All subsurface drains shall have a nominal diameter equal to or greater than six inches. b. Depth and Spacing: The minimum depth of cover of subsurface drains shall be 24 inches where possible. The spacing of drain laterals will be dependent on the permeability of the soil, the depth of installation of the drains, and degree of drainage required. Generally, drains installed 36 inches deep and spaced 50 feet center-to-center will be adequate. C. Minimum Velocity and Grade: The minimum grade for subsurface drains shall be 0.10%. Where surface water enters the system a velocity of not less than 2 feet per second shall be used to establish Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 14 the minimum grades. Provisions shall be made for preventing debris or sediment from entering the system by means of filters or collection and periodic removal of sediment from installed traps. d. Materials for Subsurface Drains: Acceptable subsurface drain materials include perforated, continuous closed joint conduits of polyethylene plastic, concrete, corrugated metal, polyvinyl chloride,and clay tile. The conduit shall meet strength and durability requirements of the site. C. Loading: The allowable loads on subsurface drain conduits shall be based on the trench and bedding conditions specified for the job. A factor of safety of not less than 1.5 shall be used in computing the maximum allowable depth of cover for a particular type of conduit. f. Envelopes and Envelope Materials: Envelopes shall be used around subsurface drains for proper bedding and to provide better flow into the conduit. Not less than three inches of envelope material shall be used for sand/gravel envelopes. Where necessary to improve the characteristics of flow of groundwater into the conduit,more envelope material may be required. Where county regulations do not allow sand/gravel envelopes,but require a special type and size of envelope material,they shall be followed. Envelope material shall be placed to the height of the upper-most seepage strata. Behind bulkheads and retaining walls,it shall go to within 12 inches of the top of the structure. This standard does not cover the design of filter materials where needed. Materials used for envelopes shall not contain materials which will cause an accumulation of sediment in the conduit or render the envelope unsuitable for bedding of the conduit. Envelope materials shall consist of either filter cloth or sand/gravel material, which shall pass a 1 '/2 inch sieve,90 to 100%shall pass a 3/4 inch sieve,and not more than 10%shall pass a No. 60 sieve. Filter cloth envelope can be either woven or non-woven monofilament yarns and shall have a sieve opening ranging from 40 to 80. The envelope shall be placed in such a manner that once the conduit is installed,it shall completely encase the conduit. The conduit shall be placed and bedded in a sand/gravel envelope. A minimum of three inches depth of envelope materials shall be placed on the bottom of a conventional trench. The conduit shall be placed on this and the trench completely filled with envelope material to minimum depth of three inches above the conduit. Soft or yielding soils under the drain shall be stabilized where required and lines protected from settlement by adding gravel or other suitable material to the trench,by placing the conduit on plank or other rigid support, or by using long sections of perforated or watertight pipe with adequate strength to ensure satisfactory subsurface drain performance. g. Use of Heavy Duty Corrugated Plastic Drainage Tubing: Heavy duty corrugated drainage tubing shall be specified where rocky or gravelly soils are expected to be encountered during installation operations. The quality of tubing will also be specified when cover over this tubing is expected to exceed 24 inches for 6-or 8-inch tubing. h. Auxiliary Structure and Subsurface Drain Protection: The outlet shall be protected against erosion and undermining of the conduit, against damaging periods of submergence, and against entry of rodents or other animals into the subsurface drain. An animal guard shall be installed on the outlet end of the pipe. A swinging animal guard shall be used if surface water enters the pipe. A continuous 10-foot section of corrugated metal,cast iron,polyvinyl chloride,or steel pipe without perforations shall be used at the outlet end of the line and shall outlet 1.0 foot above the normal elevation of low flow in the outlet ditch. No envelope material shall be used around the 10-foot section of pipe. Two-thirds of the pipe shall be buried in the ditch bank and the cantilevered section shall extend to a point above the toe of the ditch side slope. If not possible,the side slope shall be protected from erosion. Conduits under roadways and embankments shall be watertight and designed to exclude debris and prevent sediment from entering the conduit. Lines flowing under pressure shall be designed to Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 15 withstand the resulting pressures and velocity of flow. Surface waterways shall be used where feasible. The upper end of each subsurface drain line shall be capped with a tight fitting cap of the same material as the conduit or other durable material unless connected to a structure. C. TEMPORARY SOIL STABILIZATION CONTROL 1. Temporary Construction Area Seeding Providing temporary erosion control protection to disturbed areas and/or localized critical areas for an interim period by covering all bare ground that exists as a result of construction activities or a natural event. Critical areas may include but are not limited to steep excavated cut or fill slopes and any disturbed,denuded natural slopes subject to erosion. a. Water management practices must be installed as appropriate for site conditions. The area must be rough graded and slopes physically stable. Large debris and rocks are to be removed. Seedbed must be seeded within 24 hours of disturbance or scarification of the soil surface will be necessary prior to seeding. b. IF: Spring or summer or early fall,then seed the area with ryegrass(annual or perennial)at 30 lbs. per acre(approximately 1 lb/1000 square feet). C. IF: Late fall or early winter,then seed with certified `Aroostook' winter rye (cereal rye)at 100 lbs. per acre(2.5 lbs/ 1000 square feet). d. Any seeding method may be used that will provide uniform application of seed to the area and result in relatively good soil to seed contact. C. Mulch the area with hay or straw at two tons/acre(approximately 90 lbs./1000 square feet). Quality of the hay or straw mulch allowed will be determined based on long term use and visual concerns. Mulch anchoring will be required where wind or areas of concentrated water are of concern. Wood fiber hydromulch or other sprayable products approved for erosion control (nylon web or mesh) may be used if applied in accordance with manufacturers' specifications. Caution is advised when using nylon or other synthetic products; they may be difficult to remove prior to final seeding and can be a hazard to young wildlife species. D. PERMANENT SOIL STABILIZATION CONTROL 1. Landgrading: Permanent reshaping of the existing land surface by grading in accordance with the grading plan and specification to provide for erosion control and vegetative establishment on disturbed, reshaped areas. a. All graded or disturbed areas, including slopes, shall be protected during clearing and construction in accordance with the erosion and sediment control plan until they are adequately stabilized. b. All erosion and sediment control practices and measures shall be constructed, applied, and maintained in accordance with the erosion and sediment control plan and these standards. C. Topsoil required for the establishment of vegetation shall be stockpiled in the amount necessary to complete finished grading of all exposed areas. d. Areas to be filled shall be cleared, grubbed, and stripped of topsoil to remove trees, vegetation, roots,or other objectionable material. e. Areas that are to be topsoiled shall be scarified to a minimum depth of four inches prior to placement of topsoil. f. All fills shall be compacted as required to reduce erosion, slippage, settlement, subsidence,or other related problems. Fill intended to support buildings, structures,conduits, etc. shall be compacted in accordance with local requirements or codes. Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 16 g. All fill shall be placed and compacted in layers not to exceed nine inches in thickness. h. Fill material shall be free of frozen particles,brush,roots, sod, or other objectionable materials that would interfere with,or prevent,construction of satisfactory fills. i. Frozen material or soft, mucky or highly compressible materials shall not be incorporated into fill slopes or structural fills. j. Fill shall not be placed on saturated or frozen surfaces. k. All benches shall be kept free of sediment during all phases of development. 1. Seeps or springs encountered during construction shall be handled in accordance with"Subsurface Drain"(see IILC.4). 2. Soil Restoration The decompaction of areas of a development site or construction project where soils have been disturbed to recover the original properties and porosity of the soil thus providing a sustainable growth medium for vegetation,reduction of runoff and filtering of pollutants from stormwater runoff. Soil restoration shall be completed in accordance with the following table: Table 1: Soil Restoration Requirements Type of Soil Disturbance Soil Restoration Requirement Comments/Examples No soil disturbance Restoration not permitted Preservation of Natural Features Minimal soil disturbance Restoration not required Clearing and grubbing Areas where topsoil is stripped only-no HSG A&B HSG C&D change in grade Apply 6 inches of topsoil Aerate;and apply 6 inches of topsoil Areas of cut or fill HSG A&B HSG C&D Aerate;and apply 6 inches Apply full Soil of topsoil Restoration— Heavy traffic areas on site(especially in a Apply full soil restoration(decompaction and compost zone 5-25 feet around buildings but not enhancement) within a 5-foot perimeter around foundation walls) Areas where Runoff Reduction and/or Restoration not required, but may be applied to Keep construction equipment from Infiltration practices are applied enhance the reduction specified for appropriate crossing these areas. To protect practices. newly installed practice from any ongoing construction activities construct a single phase operation fence area. Redevelopment projects Soil Restoration is required on redevelopment projects in areas where existing impervious area will be converted to pervious area. Aeration includes the use of machines such as tractor-drawn implements with coulters making a narrow slit in the soil,a roller with many spikes making indentations in the soil,or prongs which function like a mini-subsoiler. Per"Deep Ripping and De-compaction,DEC 2008"-Provided in Appendix C During periods of relatively low to moderate subsoil moisture, the disturbed subsoils are returned to rough grade and the following Soil Restoration steps applied: a. Apply three inches of compost over the subsoil. The compost shall be well decomposed(matured at least three months), weed-free, organic matter. It shall be aerobically composted, possess no Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 17 objectionable odors, and contain less than 1%, by dry weight, of man-made foreign matter. The physical parameters of the compact shall meet the following standards: • Organic matter content: 25%to 100%(dry weight) • Organic portion: Fibrous and elongated • pH: 6.0 to 8.0 • Moisture content: 30%to 60% • Particle Size: 100%passing a 2"screen and 10 to 50%passing a 3/8"screen • Soluble salt concentration: 5.0 dS/m maximum Note: All biosolids compost produced in New York State(or approved for importation)must meet NYS DEC's 6NYCRR Part 360(Solid Waste Management Facilities)requirements. The Part 360 requirements are equal to or more stringent than 40 CFR Part 503 which ensure safe standards for pathogen reduction and heavy metal content. b. Till compost into subsoil to a depth of at least 12 inches using a cat-mounted ripper,tractor mounted disc,or tiller,to mix and circulate air and compost into the subsoil. C. Rock-pick until uplifted stone/rock materials of four inches and larger size are cleaned off the site. d. Apply topsoil to a depth of six inches. C. Vegetate as required by the seeding plan. Use appropriate ground cover with deep roots to maintain the soil structure. f. Topsoil may be manufactured as a mixture or a mineral component and organic material such as compost. 3. Topsoiling Spreading a specified quality and quantity of topsoil materials on graded or constructed subsoil areas to provide acceptable plant cover growing conditions, thereby reducing erosion; to reduce irrigation water needs;and to reduce the need for nitrogen fertilizer application. a. Site Preparation i. As needed, install erosion and sediment control practices such as diversions, channels, sediment traps,and stabilizing measures,or maintain if already installed. ii. Complete rough grading and final grade,allowing for depth of topsoil to be added. iii. Scarify all compact,slowly permeable,medium and fine textured subsoil areas. Scarify at approximately right angles to the slope direction in soil areas that are steeper than 5 percent. Areas that have been overly compacted shall be decompacted in accordance with the Soil Restoration Standard. iv. Remove refuse,woody plant parts,stones over three inches in diameter,and other litter. b. Topsoil Materials i. Topsoil shall have at least 6%by weight of fine textured stable organic material,and no greater than 20%. Muck soil shall not be considered topsoil. ii. Topsoil shall have not less than 20%fine textured material(passing the No. 200 sieve) and not more than 15%clay. iii. Topsoil treated with soil sterilants or herbicides shal be so identified to the purchaser. iv. Topsoil shall be relatively free of stones over 1 '/2 inches in diameter, trash, noxious weeds such as nut sedge and quackgrass,and will have less than 10%gravel. V. Topsoil containing soluble salts greater than 500 parts per million shall not be used. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 18 vi. Topsoil may be manufactured as a mixture of a mineral component and organic material such as compost. C. Application and Grading i. Topsoil shall be distributed to a uniform depth over the area. It shall not be placed when it is partly frozen,muddy,or on frozen slopes or over ice,snow,or standing water puddles. ii. Topsoil placed and graded on slopes steeper than 5% shall be promptly fertilized, seeded,mulched,and stabilized by"tracking"with suitable equipment. iii. Apply topsoil in the amounts shown below: Table 2: Topsoil Application Depth Site Conditions Intended Use Minimum Topsoil Depth Deep sand or loamy sand Mowed lawn 6 inches Tall legumes,unmowed 2 inches Tall grass,unmowed 1 inch Deep sandy loam Mowed lawn 5 inches Tall legumes,unmowed 2 inches Tall grass,unmowed None Six inches or more: silt Mowed lawn 4 inches loam,clay loam,loam,or silt Tall legumes,unmowed 1 inches Tall grass,unmowed 1 inch E. SEQUENCE OF MAJOR ACTIVITIES The contractor shall be responsible for implementing the above listed erosion and sediment control practices. The contractor may designate these tasks to certain subcontractors as is seen fit,but the ultimate responsibility for implementing these controls and ensuring their proper function remains with the contractor. The order of activities will be as follows: 1. Install stabilized construction access. 2. Install stabilized staging area. 3. Install perimeter construction fencing. 4. Demolish existing buildings and pavement areas. 5. Mass grading(cuts and fills). 6. Building foundation excavation. 7. Parking lot grading and stabilization. 8. Utility installations. 9. Concrete site work. 10. Paving. 11. Decompaction of soils in areas to be restored to pervious surfaces. 12. Final grading,topsoiling,and seeding. Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 19 SECTION IV STORMWATER MANAGEMENT The project is a development with a reduction in impervious area. As such, the standards in the New York State Stormwater Management Design Manual, Chapter 9 "Redevelopment Project" will be applied to the project. The sizing criteria that apply to redevelopment projects are the following: 1. Water Quantity Controls a. If the redevelopment activities result in no change to hydrology that increases the discharge rate from the project site,the ten-year and hundred-year criteria do not apply. b. Channel protection for redevelopment activities is not required if there are no changes to hydrology that increase the discharge rate from the project site. 2. Water Quality: The Design Manual outlines four options by which a redevelopment project can achieve the water quality objectives of the SPDES General Permit for Stormwater Discharges from Construction Activities. This project utilizes the reduction in impervious area option. Under this option, a project must reduce the existing impervious cover by a minimum of 25% of the total disturbed, impervious area. Effective implementation of this option requires restoration of soil properties in the newly created pervious areas. Soil restoration is achieved by practices such as soil amendment,deep-ripping,and de-compaction. A. METHODOLOGY 1. Hydrologic Conditions The peak runoff rates for the site were calculated for the existing and proposed hydrologic conditions using HydroCAD software. The HydroCAD program uses the standard SCS TR-55 Curve Number Method for calculation of the time of concentration, composite curve number, and peak runoff rates for the drainage area(s)based on user input. The input data was taken from soil maps, detailed topographic and utility survey information,rainfall distribution maps, and aerial images. The hydrologic conditions are used to assess the impacts to the runoff characteristics and to design appropriate measures to mitigate these impacts. 2. Rainfall Information The following table shows the rainfall values used in the analysis of the stormwater runoff. These values are taken from rainfall distribution models that the Northeast Regional Climate Center(www.precip.net). Table 3: Rainfall Data Precipitation Event 24-Hour Rainfall in inches 1-Year,24-Hour(Cp„) 2.20 10-Year,24-Hour(Qpio) 3.66 100-Year,24-Hour(Qploo) 6.12 Note: As this project is a redevelopment project with a reduction in existing impervious area of 25% or greater, WQv calculations area not required. Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 20 Extreme Precipitation Estimates 24hr 1yr 95 (rltlle9) 1.e 2.0 2.2 2.4 2.6 2.8 i a Contour Line Interval:0.10 inches 7N�`�dCR4 lMtlreaef Regional a.t CtYn41B Center X2.2 99 V � 2.2 / �ij 25 I 42 16 41 -88 -78 -78 -74 -72 Figure 10: New York State One-Year Design Storm Map Extreme Precipitation Estimates 24hr iflyr 45 — (in.haa) &0 0.8 4.0 4.8 6.0 Contour Line Interval:0.20 inches No V-1.mala-1.Regional Center 4s I t mss _ •9 41 I -8g /a ,i 74 72 Figure 11: New York State 10-Year Design Storm Map r Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 21 Extreme Precipitation Estimates 24hr ltbyr 45 (inches) 5 67 a s 44 Contour Line Interval:0.50 inches resrre4e� camera Deme, 43 -.s 5 42 s •t 41 -60 -76 -76 -74 -72 Figure 12: New York State 100-Year Design Storm 3. Soils Information Soils information for the watershed was collected from the Natural Resource Conservation Service soils mapping database. The watershed consists of three distinct mapping units: Oakville loamy fine sand, Galway loam,and Farmington loam. Oakville soils are classified as hydrologic soil group(HSG)A soils, Galway soils are HSG C soils, and Farmington soils are HSG D soils. Additional information can be found in Appendix B. B. EXISTING CONDITIONS The existing parcel of land is approximately 7.38 acres of commercially developed land located at the intersection of Quaker Road and Dix Avenue. The existing site occupies an additional 0.08 acre of the public right-of-way along Quaker Road as part of the site parking lot. The site is currently a floral shop and garden center that includes a main building, numerous greenhouses, gravel storage/display areas, a parking lot, and some minor pervious areas. The total impervious area, including paved parking areas within the public right- of-way and gravel storage/display areas, is approximately 4.65 acres (62% of the site area). The site has a gentle to mild slope. The site generally drains in a southerly direction towards the public roads. Stormwater runoff flows in three general directions. The first is towards Dix Avenue in a south-southeast direction; upon reaching the public right-of-way via overland flow, runoff runs along open conveyances continuing along Dix Ave in a south-southeast direction. The second direction is towards Quaker Avenue in a more due south direction;upon reaching the public right-of-way,runoff enters into a closed(ie,piped)system. The third direction is in northerly direction towards bordering undeveloped areas. ol OG S13AbVW V3dV 39VNIVI1a X3-U(3 ISLIZO -OA M3N'AINn00 N—V. -n.s—no 3O N.01 NOIIICINOO 9NI-LSIX3 Lo "'Z -130NVd XV1.MO SS3aav 133MIS V-Ivld'JTdV"� 3=IV0 3Vd1SV=l sss-s tu 7 S w 0 < o /'� LLJ < Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 23 The following tables summarize the TR-55 hydrologic descriptions (curve number and time of concentration) for the three drainage areas. Table 4: Existing Conditions Towards Dix Avenue Area(sf) CN Description 28,472 39 >75%Grass cover,Good,HSG A 79,930 98 Paved parking,HSG A 4,644 96 Gravel surface,HSG A 18,795 74 >75%Grass cover,Good,HSG C 32,262 98 Paved parking,HSG C 4,893 96 Gravel surface,HSG C 168,996 85 Weighted Average 56,804 33.61%Pervious Area 112,192 66.39%Impervious Area To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass: Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Property Line 15.4 509 Total Table 5: Existing Conditions Towards Quaker Road Area(sf) CN Description 4,080 74 >75%Grass cover,Good,HSG C 17,229 96 Gravel surface,HSG C 32,309 98 Paved parking,HSG C 53,618 96 Weighted Average 21,309 39.74%Pervious Area 32,309 60.26%Impervious Area To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Minimum Tc Approximately 10,435 square feet of the impervious area within the Dix Avenue watershed is the existing public road surface while 5,171 square feet of the impervious area within the Quaker Road watershed is the existing public road. Table 6: Existing Conditions Towards the North Area(sf) CN Description 5,259 96 Gravel surface,HSG D 12,485 73 Brush,Good,HSG D 9,104 98 Paved parking,HSG D 59,946 65 Brush,Good,HSG C 14,711 96 Gravel surface,HSG C 18,899 98 Paved parking,HSG C 120,404 79 Weighted Average 92,401 76.74%Pervious Area 28,003 23.26%Impervious Area To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 21.6 315 Total Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 24 C. PROPOSED CONDITIONS The proposed project includes the removal of all of the greenhouses (22 in total), the demolition of main building and greenhouse foundations, and the demolition of the existing asphalt areas. Impervious areas that are within the footprint of either the new building or new asphalt areas will be proof-rolled and/or re-graded to meet the new site grades after demolition. Existing impervious areas that are within proposed pervious areas will undergo a decompaction process in order to return the soils to a more native state. Once the site has been prepped, construction of the new building and asphalt areas can begin. The new store will be a one-story, 5,800 square-foot building. The new site also includes eight gasoline fueling pump islands and three diesel fueling pump islands. The site work includes the construction of a 31-vehicle parking lot, an onsite wastewater treatment/disposal system(septic tank and leach field), and connection to available utilities (water,gas,electric and communications). The following tables summarize the proposed condition drainage area hydrologic characteristics. Table 7: Proposed Conditions Towards Dix Avenue Area(sf) CN Description 38,471 39 >75%Grass cover,Good,HSG A 104,819 98 Impervious 20,869 74 >75%Grass cover,Good,HSG C 164,159 81 Weighted Average 59,340 36.15%Pervious Area 104,819 63.85%Impervious Area To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass: Dense n=0.240 1?2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Property Line 15.4 509 Total Table 8: Proposed Conditions Towards Quaker Road Area(sf) CN Description 19,973 74 >75%Grass cover,Good,HSG C 38,482 98 Paved parldng,HSG C 58,455 90 Weighted Average 19,973 34.17%Pervious Area 38,482 65.83%Impervious Area To Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 13.9 73 0.0150 0.09 Sheet Flow, Grass: Dense n=0.240 P2=2.57' 2.6 385 0.0150 2.49 Shallow Concentrated Flow, Paved Kv=20.3 fps 16.5 458 Total .09 Md-ma V3MV 39VNIVM(l NNOAMM'ANnOON3UMVM ALn8SN33M)JONMOi NOURINOD(13SOdONd ZLO IGWZO -130"d XVI 210 SSMOV 133UIS 3ZIVO DV?AISVA V'I v Id q I dV N SES I-q ui uj Z > w 111 oQo IJ LU silos 0 LLJ JOS C, 0 If w T6 _u i g5 lit ' 4& w V O I / ��. �t�, < < LLJ maw/ M � III "I,.12L I.— ON .os...i, 613NNVW�VillStlj L- NVId 30VNivma LIOZ sB�K NN-—'--3--m —99—nu TO NMOl (INV 9Nia"o 9 N I ILI IF[ N W), avow m3mvnt)ZLL V,IV XJldV N 3"0 DVHISV=l sfs"s C. dr Ii ill<. II CID VA -————————-- — ————————— A A A 4' (u Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 27 Table 9: Proposed Conditions to the North Area(sf) CN Description 26,848 73 Brush,Good,HSG D 93,556 65 Brush,Good,HSG C 120,404 67 Weighted Average 120,404 100.00%Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft'ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 21.6 315 Total D. WATER QUANTITY As discussed previously in the report, the proposed project is a redevelopment project with a decrease in impervious area. The demolition of the existing impervious areas alters the hydrologic characteristics of the existing drainage area. However, as the impervious area is decreasing in all three drainage areas,the changes improve the runoff characteristics. As previously discussed,the standards in the New York State Stormwater Management Design Manual, Chapter 9 "Redevelopment Project" will be applied to the project. The sizing criteria that apply to redevelopment projects are the following: 1. Water Quantity Controls a. If the redevelopment activities result in no change to hydrology that increases the discharge rate from the project site,the ten-year and hundred-year criteria do not apply. b. Channel protection for redevelopment activities is not required if there are no changes to hydrology that increase the discharge rate from the project site. 2. Water Quality: The Design Manual outlines four options by which a redevelopment project can achieve the water quality objectives of the SPDES General Permit for Stormwater Discharges from Construction Activities. This project utilizes the reduction in impervious area option. Under this option, a project must reduce the existing impervious cover by a minimum of 25% of the total disturbed, impervious area. Effective implementation of this option requires restoration of soil properties in the newly created pervious areas. Soil restoration is achieved by practices such as soil amendment,deep-ripping,and de-compaction. The HydroCAD computations for the stormwater modeling can be found in Appendices C (Existing Conditions)and D(Proposed Conditions). The following is a summary of the computations and discussion of the results. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 28 Table 10: Water Quantity Calculations 24- Rainfall Hour Event Rainfall To Dix Ave To Quaker Road To the North Existing Proposed Existing Proposed Existing Proposed Condition Condition Condition Condition Condition Condition 1-Year 2.20" 4.61 cfs 3.38 cfs 3.47 cfs 2.08 cfs 1.74 cfs 0.38 cfs 10- 3.66" 10.58 cfs 8.77 cfs 6.05 cfs 4.19 cfs 4.92 cfs 2.46 cfs Year 100- 6.12" 21.21 cfs 18.90 cfs 10.34 cfs 7.76 cfs 11.07 cfs 7.57 cfs Year E. WATER QUALITY VOLUME TREATMENT The redevelopment project will reduce the impervious area from an existing condition of 4.65 acres to a proposed of 2.8 acres. Note that, in relation to the water quality volume,NYSDEC considers gravel to be an impervious surface. The 39% reduction exceeds the minimum 25% reduction that is required to meet the standards published in Chapter 9 of the State Design Manual. Therefore, no additional water quality volume treatment is necessary. SECTION V INSPECTION AND MAINTENANCE REQUIREMENTS Best management practices,both construction and operational,must be inspected and maintained on a routine basis in order to ensure continued compliance with the NYS SPDES General Permit for Stormwater Discharges from Construction Activity. The contractor is responsible for inspecting the erosion and sediment control practices daily and after every runoff-producing rainfall event. The operator/owner is responsible for providing a qualified professional, as defined in the SPDES General Permit, to perform the required inspections of the construction site from the time earth-disturbing activities begin until final stabilization is achieved and the Notice of Termination is filed. The inspections shall occur twice a week while the site disturbance is greater than five acres. Once the disturbance is less than five acres,inspection frequency can be reduced to once every seven days. The contractor will submit written evidence of such compliance if requested by the operator or any agent of a regulatory body. The contractor will comply with all conditions of the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity, including the conditions related to maintaining the SWPPP and evidence of compliance with the SWPPP at the job site and allowing regulatory personnel access to the job site and to records in order to determine compliance. A. CONSTRUCTION MAINTENANCE/INSPECTION PROCEDURES The operator shall maintain a record of all inspection reports in a site logbook. The logbook shall be maintained on site and be made available to the permitting authority upon request. Prior to the commencement of construction,the operator shall certify in the site logbook that the SWPPP,prepared in accordance with Part IILD. of the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity, meets all Federal,State and local erosion and sediment control requirements. The operator shall post at the site, in a publicly accessible location, a summary of the site inspection activities on a monthly basis. 1. Inspection and Maintenance Practices a. Inspections shall occur at least once every seven calendar days. b. At a minimum, the qualified inspector shall inspect all erosion and sediment control practices to ensure integrity and effectiveness, all post-construction stormwater management practices under Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 29 construction to ensure that they are constructed in conformance with the SWPPP, all areas of disturbance that have not achieved final stabilization, all points of discharge to natural surface waterbodies located within or immediately adjacent to the property boundaries of the construction site,and all points of discharge from the construction site. C. The qualified inspector shall prepare an inspection report subsequent to each and every inspection. At a minimum,the inspection report shall include and/or address the following: i. Date and time of inspection; ii. Name and title of person(s)performing inspection; iii. A description of the weather and soil conditions(e.g. dry,wet, saturated)at the time of the inspection; iv. A description of the condition of the runoff at all points of discharge from the construction site. This shall include identification of any discharges of sediment from the construction site. Include discharges from conveyance systems(i.e.pipes,culverts, ditches,etc.)and overland flow; V. A description of the condition of all natural surface waterbodies located within, or immediately adjacent to,the property boundaries of the construction site which receive runoff from disturbed areas. This shall include identification of any discharges of sediment to the surface waterbody; vi. Identification of all erosion and sediment control practices that need repair or maintenance; vii. Identification of all erosion and sediment control practices that were not installed or are not functioning as designed and need to be reinstalled or replaced; viii. Description and sketch of areas that are disturbed at the time of the inspection and areas that have been stabilized(temporarily and/or final)since the last inspection; ix. Current phase of construction of all post-construction stormwater management practices and identification of all construction that is not in conformance with the SWPPP and technical standards; X. Corrective action(s) that must be taken to install, repair, replace, or maintain erosion and sediment control practices; and to correct deficiencies identified with the construction of the post-construction stormwater management practice(s);and xi. Digital photographs, with date stamp, that clearly show the condition of all practices that have been identified as needing corrective actions. The qualified inspector shall attach paper color copies of the digital photographs to the inspection report being maintained onsite within seven (7) calendar days of the date of the inspection. The qualified inspector shall also take digital photographs, with date stamp, that clearly show the condition of the practice(s) after the corrective action has been completed. The qualified inspector shall attach paper color copies of the digital photographs to the inspection report that documents the completion of the corrective action work within seven(7)calendar days of that inspection. d. Within one business day of the completion of an inspection,the qualified inspector shall notify the owner or operator and appropriate contractor or subcontractor of any corrective actions that need to be taken. The contractor or subcontractor shall begin implementing the corrective actions within one business day of this notification and shall complete the corrective actions in a reasonable time frame. e. All inspection reports shall be signed by the qualified inspector. The inspection reports shall be maintained on the site. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 30 f. ESC Inspection/Maintenance i. Concrete Truck Washout: ❑ All concrete washout facilities shall be inspected daily. Damaged or leaking facilities shall be deactivated and repaired or replaced immediately. ❑ Accumulated material shall be removed when 75% of the storage capacity of the structure is filled. ❑ Dispose of hardened material off-site in a construction/demolition landfill. Hardened material can also be recycled or buried and covered with a minimum cover of two feet of clean compacted earthfill that is permanently stabilized to prevent erosion. ❑ The plastic liner shall be replaced with each cleaning of the washout facility. ❑ Inspect the project site frequently to ensure that no concrete discharges are taking place in non-designated areas. ii. Dust Control - Maintain dust control measures through dry weather periods until all disturbed areas are stabilized. iii. Stabilized Construction Access: ❑ The access shall be maintained in a condition which will prevent tracking of sediment onto public rights-of-way or streets. This may require periodic top dressing with additional aggregate. All sediment spilled,dropped,or washed onto public rights-of-way must be removed immediately. ❑ When necessary, wheels must be cleaned to remove sediment prior to entrance onto public rights-of-way. When washing is required, it shall be done on an area stabilized with aggregate, which drains into an approved sediment-trapping device. All sediment shall be prevented from entering storm drains, ditches, or watercourses. iv. Winter Stabilization ❑ The site shall be inspected frequently to ensure that the erosion and sediment control plan is performing its winter stabilization function. If the site will not have earth disturbing activities ongoing during the "winter season", all bare exposed soil must be stabilized by established vegetation, straw, or other acceptable mulch,matting,rock,or other approved material such as rolled erosion control products. Seeding of areas with mulch cover is preferred but seeding alone is not acceptable for proper stabilization. ❑ Compliance inspections must be performed and reports filed properly in accordance with the SWPPP for all sites under winter shutdown. V. Seeding: Temporary and permanent seeding and all other stabilization measures will be inspected for bare spots,washouts,and healthy growth. g. Inspection and Maintenance Report Forms • Once installation of any required or optional erosion control device or measure has been implemented, at least twice every seven calendar days a Qualified Professional shall inspect each practice. The inspector shall use the forms found in this SWPPP to inventory and report the condition of each measure to assist in maintaining the erosion and sediment control measures in good working order. • These report forms shall become an integral part of the SWPPP and shall be made readily accessible to governmental inspection officials,the operator's engineer, and the operator for review upon request during visits to the project site. In addition, copies of the reports shall be provided to any of these persons upon requires,via mail or facsimile Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 31 transmission. Inspection and maintenance report forms are to be maintained by the permittee for three years following the final stabilization of the site. • The operator shall also prepare a written summary of its status with respect to compliance with the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity at a minimum frequency of every three months during which coverage under the SPDES General Permit exists. The summary should address the status of achieving each component of the SWPPP. The reports shall be signed by the signatory of the NOI or a duly authorized person and be retained at the construction site. h. Other Record Keeping Requirements The contractor shall keep the following records related to construction activities at the site: • Dates when major grading activities occur and the areas which were graded. • Dates and details concerning the installation of structural controls. • Dates when construction activities cease in an area. • Dates when an area is stabilized,either temporarily or permanently. • Dates of rainfall and the amount of rainfall. • Dates and descriptions of the character and amount of any spills of hazardous materials. • Records of reports filed with regulatory agencies if reportable quantities of hazardous materials are spilled. SECTION VI MATERIALS MANAGEMENT PLAN A. MATERIALS COVERED The following materials or substances are expected to be present onsite during construction: Concrete/Additives/Wastes Cleaning Solvents Detergents Petroleum-based Products Paints/Solvents Pesticides Acids Solid and Construction Wastes Sanitary Wastes Soil Stabilization Additives B. MATERIAL MANAGEMENT PRACTICES The following are the material management practices that will be used to reduce the risk of spills or other accidental exposure of materials and substances to stormwater runoff. The job site superintendent will be responsible for ensuring that these procedures are followed. 1. Good Housekeeping The following good housekeeping practices will be followed onsite during the construction project: ❑ An effort will be made to store only enough products required to do the job. ❑ All materials stored onsite will be stored in a neat, orderly manner and, if possible, under a roof or in a containment area. At a minimum,all containers will be stored with their lids on when not in use. Drip pans shall be provided under all dispensers. ❑ Products will be kept in their original containers with the original manufacturer's label in legible condition. ❑ Substances will not be mixed with one another unless recommended by the manufacturer. ❑ Whenever possible,all of a product will be used up before disposing of the container. 0 Manufacturer's recommendations for proper use and disposal will be followed. Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 32 ❑ The job site superintendent will be responsible for daily inspections to ensure proper use and disposal of materials. 2. Hazardous Products These practices will be used to reduce the risks associated with hazardous materials. Material Safety Data Sheets (MSDS's) for each substance with hazardous properties that is used on the job site will be obtained and used for the proper management of potential wastes that may result from these products. An MSDS will be posted in the immediate area where such product is stored and/or used and another copy of each MSDS will be maintained in the SWPPP file at the job site construction trailer office. Each employee who must handle a substance with hazardous properties will be instructed on 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 material safety data sheets (MSDS's)will be procured and used for each material. ❑ If surplus product must be disposed of, manufacturer's or local/state/federal recommended methods for proper disposal will be followed. 3. Hazardous Waste All hazardous waste materials will be disposed of by the contractor in the manner specified by local, state, and/or federal regulations and by the manufacturer of such products. Site personnel will be instructed in these practices by the job site superintendent, who will also be responsible for seeing that these practices are followed. 4. Product Specific Practices The following product specific practices will be followed on the job site. a. Petroleum Products All onsite vehicles will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage. Petroleum products will be stored in tightly sealed containers,which are clearly labeled. Any petroleum storage tanks used onsite will have a dike or berm containment structure constructed around it to contain any spills that may occur. Drip pans shall be provided for all dispensers. Any asphalt substances used onsite will be applied according to the manufacturer's recommendations. b. Fertilizers Due to the limited functionality on this project,fertilizers will not be applied to any vegetated areas. C. Paints,Paint Solvents,and Cleaning Solvents All containers will be tightly sealed and stored when not in use. Excess paint and solvents will not be discharged to the storm sewer system but will be properly disposed of according to manufacturer's instructions or state and federal regulations. C. SPILL PREVENTION AND RESPONSE PROCEDURES The contractor will train all personnel in the proper handling and cleanup of spilled materials. No spilled hazardous materials or hazardous wastes will be allowed to come in contact with stormwater discharges. If such contact occurs, the stormwater discharge will be contained on site until appropriate measures in compliance with state and federal regulations are taken to dispose of such contaminated stormwater. It shall be the responsibility of the job site superintendent to properly train all personnel in spill prevention and clean up procedures. In order to minimize the potential for a spill of hazardous materials to come into contact with stormwater,the following steps will be implemented: Fastrac Cafe 773 Quaker Road, Town of Queensbury ► Page 33 1. All materials with hazardous properties (such as pesticides, petroleum products, fertilizers, detergents, construction chemicals, acids, paints, 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 the job site. 3. A spill control and containment kit (containing, for example, absorbent materials, acid neutralizing powder, brooms, dust pans,mops, rags, gloves, goggles,plastic and metal trash containers, etc.)will be provided at the storage site. 4. Manufacturer's recommended methods for spill cleanup will be clearly posted and site personnel will be trained regarding these procedures and the location of the information and cleanup supplies. In the event of a spill,the following procedures should be followed: 1. All spills will be cleaned up immediately after discovery. 2. The spill area will be kept well ventilated and personnel will wear appropriate protective clothing to prevent injury from contact with the hazardous substances. 3. The project manager and the Engineer-of-Record will be notified immediately. 4. Spills of toxic or hazardous materials will be reported to the appropriate federal, state, and/or local government agency regardless of the size of the spill. Spills of amounts that exceed Reportable Quantities of certain substances specifically mentioned in federal regulations (40 CFR 110,40 CFR 117, and 40 CFR 302) must be immediately reported to the NYS DEC 24-Hour Spill Hotline at 1-800-457- 7362. 5. If the spill exceeds a Reportable Quantity,the SWPPP must be modified within seven(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 plans must identify measures to prevent the recurrence of such releases and to respond to such releases. 6. The job site superintendent will be the spill prevention and response coordinator. He will designate the individuals who will receive spill prevention and response training. These individuals will each become responsible for a particular phase of prevention and response. The names of these personnel will be posted in the material storage area and in the office trailer onsite. D. CONTROL OF NON-STORMWATER DISCHARGES Certain types of discharges are allowable under the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity 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 it is discharged. The control measures,which have been outlined previously in this SWPPP,will be strictly followed to ensure that no contamination of these non-stormwater discharges takes place. The following non-stormwater discharges are allowed by the NYSDEC and may occur at the job site: 1. Discharges from fire fighting activities 2. Fire hydrant flushing 3. Waters to which cleansers or other components have not been added that are used to wash vehicles or control duct. 4. Routine external building washdown which does not use detergents 5. Pavement washwaters where spills or leaks of toxic or hazardous materials have not occurred(unless all spilled material has been removed)and where detergents are not used Fastrac Cafe 773 Quaker Road, Town of Queensbury Page 34 6. Air conditioning condensate 7. Springs 8. Foundation or footing drains where flows are not contaminated with process materials such as solvents. SECTION VII CERTIFICATION AND NOTIFICATION The New York State Department of Environmental Conservation requires that the operator and the contractor make certifications of knowledge of the contents of this SWPPP and agreement to follow the SWPPP. The terms of the General Permit also require that each contractor sign the SWPPP plan,thereby making them co- permittees and acknowledging their responsibility for certain operation aspects of the plan. These certifications should be signed before the contractor begins activities and should be filed with the site's SWPPP at the jobsite. Upon completion of the work,a representative of StonnTech will provide the engineer with a certification that the installation of the underground storage system is in compliance with the approved plans and that the manner of installation meets StormTech's specifications. This certification will be submitted to the Town with the Engineer's certification of that the entire stormwater system has been constructed in compliance with the approved plans,specifications,and SWPPP. APPENDIX A SHWO Correspondence EroKParks Recreation STATE QF , # aPPoR TUN ITY. and Historic Preservation ANDREW M. CUOMO ROSE HARVEY Governor Commissioner December 20, 2016 Mr. Rodney Ives Project Manager Napierala Consulting 110 Fayette Street Manlius, NY 13104 Re: DEC Proposed Fastrac Cafe 773 Quaker Road Queensbury NY 773 Quaker Road, Queensbury, NY 12804 16PRO8633 Dear Mr. Ives: Thank you for requesting the comments of the Office of Parks, Recreation and Historic Preservation (OPRHP). We have reviewed the project in accordance with the New York State Historic Preservation Act of 1980 (Section 14.09 of the New York Parks, Recreation and Historic Preservation Law). These comments are those of the OPRHP and relate only to Historic/Cultural resources. They do not include potential environmental impacts to New York State Parkland that may be involved in or near your project. Such impacts must be considered as part of the environmental review of the project pursuant to the State Environmental Quality Review Act (New York Environmental Conservation Law Article 8) and its implementing regulations (6 NYCRR Part 617). Based upon this review, it is the New York State Office of Parks, Recreation and Historic Preservation's opinion that your project will have no impact on archaeological and/or historic resources listed in or eligible for the New York State and National Registers of Historic Places. If further correspondence is required regarding this project, please be sure to refer to the OPRHP Project Review (PR) number noted above. Sincerely, Michael F. Lynch, P.E., AIA Director, Division for Historic Preservation Division for Historic Preservation P.O. Box 189,Waterford, New York 12188-0189•(518)237-8643•www.nysparks.com APPENDIX B NRCS Soils Mapping Hydrologic Soil Group—Warren County, New York 612500 612540 612580 6121620 612660 612700 612740 43°19'5"N ^ f I + C I 43°19'5"N O _ 4 UPO f X - • O � n r � r r � v 4 � n m O M ' f � O 5 5 O V y^y1� m n V m _ V n Warning: Soil Map may not be valid at this scale. 43°18'53"N I I I I V 43°18-53"N 612500 612540 612580 612620 612660 612700 612740 LD - Map Scale:1:1,810 if printed on A portrait(8.5"x 11")sheet. N Meters 0 25 50 100 150 Feet 0 50 100 200 300 Map projection:Web Mercator Corner coordinates:WGS84 Edge tics:UTM Zone 18N WGS84 US/bA_ Natural Resources Web Soil Survey 11/30/2016 Conservation Service National Cooperative Soil Survey Pagel of 4 Hydrologic Soil Group—Warren County, New York MAP LEGEND MAP INFORM, Area of Interest(AOI) p C The soil surveys that comprise your AO 0 Area of Interest(AOI) ❑ C/D Warning: Soil Map may not be valid at t Soils D Soil Rating Polygons Enlargement of maps beyond the scale A 0 Not rated or not available misunderstanding of the detail of mappi placement.The maps do not show the A/D Water Features soils that could have been shown at a n Streams and Canals Q B Transportation Please rely on the bar scale on each m. Q B/D Rails measurements. i--�-+ 0 C .,_. Interstate Highways Source of Map: Natural Resources C Web Soil Survey URL: http://websoil: 0 C/D US Routes Coordinate System: Web Mercator(E 0 D Major Roads Maps from the Web Soil Survey are bw 0 Not rated or not available Local Roads projection,which preserves direction ar distance and area.A projection that pre Soil Rating Lines Background Albers equal-area conic projection,shot " 0 A N11116 Aerial Photography calculations of distance or area are reqs " • A/D This product is generated from the USD, ~ B the version date(s)listed below. B/D Soil Survey Area: Warren County, Ne Survey Area Data: Version 16, Sep 2 C Soil map units are labeled(as space alto, C/D or larger. D Date(s)aerial images were photographs Not rated or not available 2010 Soil Rating Points The orthophoto or other base map on% ❑ A compiled and digitized probably differs imagery displayed on these maps.As a A/D of map unit boundaries may be evident. 0 B 0 B/D uson Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey Hydrologic Soil Group—Warren County, New York Hydrologic Soil Group Hydrologic Soil Group—Summary by Map Unit—Warren County,New York(NY113) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI FrC Farmington loam,very D 4.6 56.4% rocky,3 to 15 percent slopes GaB Galway loam,3 to 8 C 0.6 7.0% percent slopes OaA Oakville loamy fine sand, A 3.0 36.6% 0 to 3 percent slopes Totals for Area of Interest 8.2 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained orwell drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture.These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential)when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. usoA Natural Resources Web Soil Survey 11/30/2016 4� Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group—Warren County, New York Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff.- None Specified Tie-break Rule: Higher USDA Natural Resources Web Soil Survey 11/30/2016 4� Conservation Service National Cooperative Soil Survey Page 4 of 4 APPENDIX C HydroCAD Output - Existing Conditions Existing Conditions Type 1124-hr 1 yr Rainfall=2.20" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pam Summary for Subcatchment 1S: Towards Dix Ave Runoff = 4.61 cfs @ 12.08 hrs, Volume= 0.278 @ Depth> 0.86" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 28,472 39 >75%Grass cover,Good,HSG A 79,930 98 Paved parking,HSG A 4,644 96 Gravel surface,HSG A 18,795 74 >75%Grass cover,Good,HSG C 32,262 98 Paved parking,HSG C 4,893 96 Gravel surface,HSG C 168,996 85 Weighted Average 56,804 33.61%Pervious Area 112,192 66.39%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Property Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 3.47 cfs @ 11.96 hrs, Volume= 0.170 @ Depth> 1.66" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 4,080 74 >75%Grass cover,Good,HSG C 17,229 96 Gravel surface,HSG C 32,309 98 Paved parking,HSG C 53,618 96 Weighted Average 21,309 39.74%Pervious Area 32,309 60.26%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Minimum Tc Summary for Subcatchment 3S: Towards the North Runoff = 1.74 cfs @ 12.16 hrs, Volume= 0.132 @ Depth> 0.57' Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 5,259 96 Gravel surface,HSG D 12,485 73 Brush,Good,HSG D 9,104 98 Paved parking,HSG D 59,946 65 Brush,Good,HSG C 14,711 96 Gravel surface,HSG C 18,899 98 Paved parking,HSG C 120,404 79 Weighted Average 92,401 76.74%Pervious Area 28,003 23.26%Impervious Area Existing Conditions Type1124-hr 1 yr Rainfall=2.20" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pam Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total Existing Conditions Type 1124-hr 10 yr Rainfall=3.66" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pate 3 Summary for Subcatchment 1S: Towards Dix Ave Runoff = 10.58 cfs @ 12.07 hrs, Volume= 0.645 @ Depth> 1.99" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 28,472 39 >75%Grass cover,Good,HSG A 79,930 98 Paved parking,HSG A 4,644 96 Gravel surface,HSG A 18,795 74 >75%Grass cover,Good,HSG C 32,262 98 Paved parking,HSG C 4,893 96 Gravel surface,HSG C 168,996 85 Weighted Average 56,804 33.61%Pervious Area 112,192 66.39%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Property Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 6.05 cfs @ 11.96 hrs, Volume= 0.307 @ Depth> 2.99" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 4,080 74 >75%Grass cover,Good,HSG C 17,229 96 Gravel surface,HSG C 32,309 98 Paved parking,HSG C 53,618 96 Weighted Average 21,309 39.74%Pervious Area 32,309 60.26%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Minimum Tc Summary for Subcatchment 3S: Towards the North Runoff = 4.92 cfs @ 12.15 hrs, Volume= 0.355 @ Depth> 1.54" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 5,259 96 Gravel surface,HSG D 12,485 73 Brush,Good,HSG D 9,104 98 Paved parking,HSG D 59,946 65 Brush,Good,HSG C 14,711 96 Gravel surface,HSG C 18,899 98 Paved parking,HSG C 120,404 79 Weighted Average 92,401 76.74%Pervious Area 28,003 23.26%Impervious Area Existing Conditions Type 1124-hr 10 yr Rainfall=3.66" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pate 4 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total Existing Conditions Type1124-hr 100 yrRainfall=6.12" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pace 5 Summary for Subcatchment 1S: Towards Dix Ave Runoff = 21.21 cfs @ 12.07 hrs, Volume= 1.333 g Depth> 4.12" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 28,472 39 >75%Grass cover,Good,HSG A 79,930 98 Paved parking,HSG A 4,644 96 Gravel surface,HSG A 18,795 74 >75%Grass cover,Good,HSG C 32,262 98 Paved parking,HSG C 4,893 96 Gravel surface,HSG C 168,996 85 Weighted Average 56,804 33.61%Pervious Area 112,192 66.39%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Property Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 10.34 cfs @ 11.96 hrs, Volume= 0.536 g Depth> 5.23" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 4,080 74 >75%Grass cover,Good,HSG C 17,229 96 Gravel surface,HSG C 32,309 98 Paved parking,HSG C 53,618 96 Weighted Average 21,309 39.74%Pervious Area 32,309 60.26%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Minimum Tc Summary for Subcatchment 3S: Towards the North Runoff = 11.07 cfs @ 12.14 hrs, Volume= 0.807 g Depth> 3.50" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 5,259 96 Gravel surface,HSG D 12,485 73 Brush,Good,HSG D 9,104 98 Paved parking,HSG D 59,946 65 Brush,Good,HSG C 14,711 96 Gravel surface,HSG C 18,899 98 Paved parking,HSG C 120,404 79 Weighted Average 92,401 76.74%Pervious Area 28,003 23.26%Impervious Area Existing Conditions Type1124-hr 100 yrRainfall=6.12" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pace 6 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total APPENDIX D HydroCAD Output - Proposed Conditions Proposed Conditions Type 1124-hr 1 yr Rainfall=2.20" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pam Summary for Subcatchment 1S: Towards Dix Ave Runoff = 3.38 cfs @ 12.09 hrs, Volume= 0.208 @ Depth> 0.66" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 38,471 39 >75%Grass cover,Good,HSG A * 104,819 98 Impervious 20,869 74 >75%Grass cover,Good,HSG C 164,159 81 Weighted Average 59,340 36.15%Pervious Area 104,819 63.85%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Properri Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 2.08 cfs @ 12.09 hrs, Volume= 0.131 @ Depth> 1.17' Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 19,973 74 >75%Grass cover,Good,HSG C 38,482 98 Paved parking,HSG C 58,455 90 Weighted Average 19,973 34.17%Pervious Area 38,482 65.83%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.9 73 0.0150 0.09 Sheet Flow, Grass:Dense n=0.240 P2=2.57' 2.6 385 0.0150 2.49 Shallow Concentrated Flow, Paved Kv=20.3 fps 16.5 458 Total Summary for Subcatchment 3S: Towards the North Runoff = 0.38 cfs @ 12.22 hrs, Volume= 0.046 @ Depth> 0.20" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 1-yr Rainfall=2.20" Area(sf) CN Description 26,848 73 Brush,Good,HSG D 93,556 65 Brush,Good,HSG C 120,404 67 Weighted Average 120,404 100.00%Pervious Area Proposed Conditions Type1124-hr 1 yr Rainfall=2.20" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pam Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total Proposed Conditions Type 1124-hr 10 yr Rainfall=3.66" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pate 3 Summary for Subcatchment 1S: Towards Dix Ave Runoff = 8.77 cfs @ 12.08 hrs, Volume= 0.530 @ Depth> 1.69" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 38,471 39 >75%Grass cover,Good,HSG A * 104,819 98 Impervious 20,869 74 >75%Grass cover,Good,HSG C 164,159 81 Weighted Average 59,340 36.15%Pervious Area 104,819 63.85%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Properri Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 4.19 cfs @ 12.08 hrs, Volume= 0.271 @ Depth> 2.42" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 19,973 74 >75%Grass cover,Good,HSG C 38,482 98 Paved parking,HSG C 58,455 90 Weighted Average 19,973 34.17%Pervious Area 38,482 65.83%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.9 73 0.0150 0.09 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.6 385 0.0150 2.49 Shallow Concentrated Flow, Paved Kv=20.3 fps 16.5 458 Total Summary for Subcatchment 3S: Towards the North Runoff = 2.46 cfs @ 12.17 hrs, Volume= 0.192 @ Depth> 0.83" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 10-yr Rainfall=3.66" Area(sf) CN Description 26,848 73 Brush,Good,HSG D 93,556 65 Brush,Good,HSG C 120,404 67 Weighted Average 120,404 100.00%Pervious Area Proposed Conditions Type 1124-hr 10 yr Rainfall=3.66" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pate 4 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total Proposed Conditions Type 1124-hr 100 yr Rainfall=6.12" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pace 5 Summary for Subcatchment 1S: Towards Dix Ave Runoff = 18.90 cfs @ 12.07 hrs, Volume= 1.165 @ Depth> 3.71" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 38,471 39 >75%Grass cover,Good,HSG A * 104,819 98 Impervious 20,869 74 >75%Grass cover,Good,HSG C 164,159 81 Weighted Average 59,340 36.15%Pervious Area 104,819 63.85%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.7 104 0.0380 0.14 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.7 405 2.50 Direct Entry,Ditch Along Properri Line 15.4 509 Total Summary for Subcatchment 2S: Towards Quaker Ave Runoff = 7.76 cfs @ 12.08 hrs, Volume= 0.519 @ Depth> 4.64" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 19,973 74 >75%Grass cover,Good,HSG C 38,482 98 Paved parking,HSG C 58,455 90 Weighted Average 19,973 34.17%Pervious Area 38,482 65.83%Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.9 73 0.0150 0.09 Sheet Flow, Grass:Dense n=0.240 P2=2.57" 2.6 385 0.0150 2.49 Shallow Concentrated Flow, Paved Kv=20.3 fps 16.5 458 Total Summary for Subcatchment 3S: Towards the North Runoff = 7.57 cfs @ 12.15 hrs, Volume= 0.548 @ Depth> 2.38" Runoff by SCS TR-20 method,UH=SCS,Weighted-CN,Time Span=5.00-20.00 hrs,dt=0.05 hrs Type II 24-hr 100-yr Rainfall=6.12" Area(sf) CN Description 26,848 73 Brush,Good,HSG D 93,556 65 Brush,Good,HSG C 120,404 67 Weighted Average 120,404 100.00%Pervious Area Proposed Conditions Type 1124-hr 100 yr Rainfall=6.12" Prepared by Napierala Consulting HydroCAD®10.00-18 s/n 01332 ©2016 HydroCAD Software Solutions LLC Pace 6 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.5 110 0.0050 0.09 Sheet Flow, Grass: Short n=0.150 P2=2.57" 1.1 205 0.0390 3.18 Shallow Concentrated Flow, Unpaved Kv=16.1 fps 21.6 315 Total APPENDIX E Notice of Intent