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HomeMy WebLinkAbout2023-07-17 Storm Water Response to Comments_YarmouthO&MOperation & Maintenance Plan FOR COLBEA ENTERPRISES, LLC 473, 479 & 487 Station Ave, Yarmouth, MA Prepared By: 31 Hayward Street, Ste. E-1 Phone: 508-528-0770 Garrett Small, P.E. Date: 07/10/2023 HFA Project No. 42-21-20002 1. Parcel and Stormwater Management System Owner Owner: Colbea Enterprises LLC 695 George Washington Hwy -------------------------------------------------- Lincoln, RI 02865 signature date Contact: Michael Gazdacko, 401-943-0005x356 Tenant/Operator: Colbea Enterprises LLC 695 George Washington Hwy --------------------------------------------------- Lincoln, RI 02865 signature date Contact: Michael Gazdacko, 401-943-0005x356 2. Party Responsible for Operation and Maintenance See Owner and Operator information above. The property owner is ultimately responsible for the maintenance and operation of all on-site drainage structures as defined in this plan and as further detailed in the approved site plan and related stormwater drainage study. As part of the approval of this plan, the owner and operator agree to allow municipal officials to periodically access the facility and inspect the storm water components and condition of the property as it relates to determining compliance with this plan. 3. General Information The purpose of this document is to outline the operation and maintenance of the stormwater management system proposed as part of the site plan for the Retail Fueling Facility at 473, 479 & 487 Station Avenue, Yarmouth, Massachusetts. The stormwater management system consists of three new deep sump catch basins; one drain inlet, and two Oil/Grit Separators to collect runoff from the pavement of LUHPLL area and the drive-thru area behind the building and discharge to two Bioretention Areas. The building roof discharges to Bioretention Area #1, and the canopy roof discharges to a subsurface infiltration system. See attached plans for layout and details of the site stormwater systems. In order to preserve the integrity of the infiltration systems, no materials will be stored on the roof of the building or the canopy. The only equipment to be installed on the roof will be that related to the HVAC system for the building and communication equipment. Any spills at the site (gas station) will be cleaned up as immediately and as possible, action will be taken to prevent spills from reaching any inlets. All maintenance shall be done by qualified persons and any materials removed must be disposed of in accordance with the laws, regulations and rules of the Commonwealth of Massachusetts and the Town of Yarmouth. 4. Schedule for Implementation of Maintenance Tasks The roofs, building, canopy, decking and downspouts will be inspected at least once per year for any debris, particularly such as leaves, and cleaned as necessary but at a minimum of once each late autumn after all the leaves of nearby trees have fallen. All scuppers, downspouts and drainage structures will be maintained in good condition so that no runoff is diverted to overflow elsewhere. The subsurface infiltration system inlets will be inspected at least twice a year. Remove any debris that might clog the system, and per the StormTech design manual cleaning is required when sediment is at a depth of about 25% pipe volume or 25% pipe diameter. The catch basins will be inspected at least four times a year and at the end of the foliage and snow removal seasons. Cleaning is required four times a year or when the depth of deposits is greater than or equal to one half the depth from the bottom of the invert of the lowest pipe in the sump. The bioretention area should be inspected at least monthly, and after storm events greater than, or equal to the 1-year, 24-hour Type III precipitation event, to ensure the system is functioning properly. Inspect soil and repair eroded areas monthly. Re-mulch void areas as needed. Remove litter and debris monthly. Treat diseased vegetation as needed. Remove and replace dead vegetation twice per year (spring and fall). Remove invasive species as needed to prevent these species from spreading into the bioretention area. Replace mulch every two years, in the early spring. Upon failure, excavate the bioretention area, scarify bottom and sides, replace filter fabric and soil, replant, and mulch. The soil medium is to be tested every two years to determine the cation exchange capacity. When it drops below 5 meq/100 grams, the soil medium is to be replaced. The infiltration system’s Isolator Rows will be inspected at least twice the first year per manufacturer recommendations and subsequent years based on the oil and sediment accumulation rate determined during the first-year observations. Cleaning is required when sediment depth reaches 3” in the Isolator row. This structure should also be inspected after any fuel spill (gas station) or major storm. Polluted water or sediments removed from the chambers should be disposed of in accordance with all applicable local, state and federal laws and regulations. Cleaning includes jetting the chamber row and removal of accumulated oil and grease and sediment using a vacuum truck or other ordinary catch basin cleaning device. The Oil/grit separators will be inspected at least every month and after every major storm. Cleaning is required twice a year and includes removal of accumulated oil and grease and sediment using a vacuum truck or other ordinary catch basin cleaning device. The trash enclosure area is to be inspected weekly, and to be maintained so that no unsecured containers are stored there that may leak onto the pavement. Any spills will be cleaned up immediately. The enclosures will be swept occasionally to keep them in a clean and orderly condition. Trash containers must be kept covered to keep stormwater from contacting the inside. At least once each week, the lot including access ways, parking areas, fences, walls and landscape will be inspected and any trash will be collected and properly disposed. At least twice each year, the pavement areas will be swept and all sediment, leaf litter and other organic debris will be collected and properly disposed. No vehicle maintenance will be conducted on the site. No vehicle washing will be conducted on site. Any spills, particularly at the dispensing and tank area of the gas station will be cleaned up immediately. All station employees will be trained on company spill response procedures notification procedures. At least once each week all dispensing equipment including hoses and nozzles will be inspected for any signs of leaks or excessive wear and replaced or repaired as appropriate. Restrictions on the application of fertilizers, including: i. Fertilizer shall not be applied during or immediately prior to heavy rainfall, such as but not limited to thunderstorms, hurricanes, or northeastern storms, or when the soil is saturated due to intense or extended rainfall; ii. Fertilizer shall not be applied between November 12 and the following March 31; iii. Fertilizer shall not be applied, spilled or deposited on impervious surfaces or in a manner that allows it to enter into storm drains; iv. Fertilizer shall not be applied within 100 feet of any surface water or within the Zone I of a public drinking water well; v. Fertilizer containing phosphorus shall not be applied unless a soil test taken not more than three years before the proposed fertilizer application indicates that additional phosphorus is needed for growth of that turf, or unless establishing new turf or reestablishing or repairing turf after substantial damage or land disturbance; vi. A single application of fertilizer that contains nitrogen shall not exceed 1.0 pound of nitrogen per 1,000 square feet, shall consist of at least 20% slow-release nitrogen (SRN) fertilizer (NOTE: This represents the minimum percentage: use of higher SRN content is generally preferable, especially on sandy root zones, during stress and pre-stress periods, and when there are fewer annual applications of nitrogen made to a lawn) and the annual rate shall not exceed 3.2 pounds of actual nitrogen per thousand square feet. Single applications shall be done at intervals of no less than four weeks until the annual maximum is reached; vii. Grass clippings, leaves, or any other vegetative debris shall not be deposited into or within 50 feet of water bodies, retention and detention areas, drainage ditches or stormwater drains, or onto impervious surfaces, such as, but not limited to, roadways and sidewalks, except during scheduled clean-up programs. . During winter conditions the catch basin inlets and discharge outlets are to be kept clear of snow and ice at all times. Snow plowed from the pavement areas is to be stored on the grass areas designated on the plans, and at no time is it to be deposited inside or in front of the Bioretention Areas. Any snow in excess of the volume able to be stored on site is to be removed from the site and disposed of appropriately. Deicing is to be kept to the minimum amount possible to maintain customer safety. See attached Maintenance Log Form that includes schedule for each above item. 5. Public Safety Features There are no public safety features associated with this stormwater management system. 6. Estimated Operation and Maintenance Budget This is a small stormwater system, and the annual O&M Budget reflects approximately forty hours of operator/manager labor plus sweeping costs and is estimated to cost approximately $5,000/year. 7. Operation and Maintenance Reports The owner/operator will be the responsible party for post construction stormwater system operation and maintenance. The owner/operator is required to maintain a record keeping log of all required and performed maintenance and submit any reports relevant to operation and maintenance of the stormwater system, and any fees as required by the Town of Yarmouth. Any changes to this plan or the responsible parties will be reported to the Town of Yarmouth DPW within thirty days of the change. Stormwater Operation and Maintenance Log Form Convenience Store / Gas Station - owned by Colbea Enterprises LLC 473, 479 & 487 Station Avenue, Yarmouth, MA The purpose of this Log Form is to document inspection and maintenance of the stormwater management system. See the the system Operation and Maintenance Plan and System Management Plan for system description. Weekly Inspect Trash Enclosure for unsecured containers, clean up any spills. Inspect all dispensing equipment including hoses and nozzles for excessive wear or signs of leaks, replace or repair as necessary Quarterly Catch Basins to be inspected for depth of deposits when greater than or equal to one half the depth from the bottom. Oil/Grit Separator to be inspected and require removal of accumulated oil and grease and sediment using a vacuum truck. Semi-annually and after any major storm or fuel spill event Sweep all paved areas to collect and dispose of sediment, especially in the Spring to remove winter sand. Inspect Bioretention Areas, replenish mulch and rototill as needed. Annually Inspect Roof and clean all debris and leaves, clear all scuppers and downspouts for proper flow Date Initials Description of Activity Comments, Observations, Recommendations An company 2 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS TM ECCENTRIC HEADER MANHOLE WITH OVERFLOW WEIR STORMTECH ISOLATOR ROW OPTIONAL PRE-TREATMENT OPTIONAL ACCESS STORMTECH CHAMBERS  )(