TECHNICAL SPECIFICATION

Transcription

1 TECHNICAL SPECIFICATION ITEM TEMPORARY VEHICLE AND EQUIPMENT FUELING AREA PART 1 - GENERAL 1.01 Description Installation of erosion and sediment control for a temporary vehicle and equipment fueling area for aboveground fuel storage tank, which will be on site for more than 48 hours, or as directed or as directed by the Engineer Related Work Related work as called for on PLANS or specified elsewhere in this or other TECHNICAL SPECIFICATIONS Submittals A. Submit manufacturer s catalog sheets and other product data on dispensing equipment, pump, and aboveground fuel storage tanks, indicating the capacity and dimensions of the tank. B. Submit drawings to show the location of tank protection area and driveway. Indicate the nearest inlet or channelized flow area. Clearly dimension all distances and measurements. C. Submit a list of spill containment equipment, and quantities thereof, located at the fueling area. D. Submit manufacturer s catalog sheets and other product data on geotextile fabric Quality Assurance Person conducting visual examination for pollutant shall be fully knowledgeable about the NPDES Construction General Permit, detecting sources of storm water contaminants, inspection of aboveground storage tank and appurtenances for leakage, and the day-to-day operations that may cause unexpected pollutant releases. PART 2 - PRODUCTS 2.01 Aboveground Storage Tank A. Tank Assembly: Must be listed with UL 1709 and UL B. Inner Steel Storage Tank: Follow UL 142, with minimum thickness of 1/8-inch all welded construction

2 C. Tank Encasement: Either concrete or steel to provide a minimum of 110 percent containment of the inner tank capacity. Provide 5-gallon overspill containment pan for tank refueling. D. Dispenser Pump: For submersible pump, UL listed emergency shut-off valve to be installed at each dispenser. For suction pump, UL listed vacuum-activated shut-off valve, with a shear section, is to be installed at each dispenser. Fuel may not be dispensed from a tank by gravity flow or by pressurization of the tank. Means must be provided to prevent release of fuel by siphon flow. E. Representative Manufacturers: Convault, Fireguard, Ecovault, SuperVault, or equal Concrete Provide concrete with a minimum strength of 4,000 psi at 28 days Aggregates A. Coarse aggregate shall consist of crushed stone, gravel, crushed blast furnace slag, or a combination of these materials. Aggregate shall be composed of clean, hard, durable materials, free from adherent coatings, salt, alkali, dirt, clay, loam, shale, soft or flaky materials, or organic and injurious matter. B. Coarse aggregate shall conform to the following graduation requirements. Sieve Size (Square Mesh) Percent Retained (By Weight) 2½ ½ ¾ No Geotextile Fabric A. Woven or non-woven geotextile filter fabric made of either polypropylene, polyethylene, ethylene, or polyamide material, in continuous rolls of longest practical length. B. Grab Strength: 270 psi in any principal direction (ASTM D4632), Mullen burst strength exceeding 200 psi (ASTM D-3786), and the equivalent opening size between 50 and 70. C. Furnish ultraviolet inhibitors and stabilizers to provide a minimum of 6 months of expected usable construction life at a temperature range of 0 F to 120 F. D. Representative Manufacturers: Mirafi, Inc., Synthetic Industries, or equal

3 PART 3 - EXECUTION 3.01 General A. Do not clear, grub, or rough cut until erosion and sedimentation control systems are in place, unless otherwise approved by Engineer. B. Maintain existing erosion and sedimentation control systems located within the project site installed by others prior to start of construction under this contract until acceptance of the project or until directed by the Engineer to remove and dispose the existing systems. C. Inspect and repair or replace components of all erosion and sedimentation control systems as specified for each type of system. Unless otherwise directed, maintain the erosion and sedimentation control systems until acceptance of the project. Remove erosion and sedimentation control systems promptly when directed by the Engineer and dispose of removal materials offsite. D. Remove and dispose of sediment deposits at the project spoil site. If a project spoil site is not designated on Drawings, dispose sediment at an offsite location. Contractor assumes responsibility for offsite disposal location. Sediment shall be disposed of at an offsite location not in or adjacent to a stream or floodplain. Spread, compact, and stabilize sediment placed at the project site in accordance with the directions of the Engineer. Do not allow sediment to flush into a stream or drainage way. If sediment is contaminated, dispose of sediment in accordance with federal, state and local regulations. E. Do not maneuver equipment or vehicles on areas outside of dedicated rights-of-way and easements for construction. Immediately repair damages caused by construction traffic to erosion and sedimentation control systems. F. Employ protective measures to avoid damage to existing trees to be retained on the project site. Conduct all construction operations under this Contract in conformance with the erosion control practices described in Item General Source Controls. G. Contractor to prepare spill response and containment procedures to be implemented in the event of a significant materials spill. Significant materials include but are not limited to: raw materials; fuels; materials such as solvent, detergents, and plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; hazardous substances designated under section 101(14) of CERCLA; any chemical required to be reported pursuant to Section 313 of Title III of SARA; fertilizers; pesticides, and waste products such as slag, ashes and sludge that have the potential to be released with storm water discharges. Spill containment procedures shall be kept on-site or in construction field office. H. Spill containment equipment appropriate to the size of operation is to be located in close proximity of the fueling area. Such equipment includes, but not limited to, suitable waste containers for significant materials, drip pans, booms, inlet covers, or absorbent

4 I. All significant materials or waste containers used for construction activities and stored on-site overnight are to be properly labeled Construction Methods A. Provide fuel tank protection area and driveway as shown on the Drawings. B. Do not locate fueling area in or near a channelized flow area or close to a storm sewer conveyance system. Sufficient space must be provided to allow installation of other erosion and sediment controls to protect those areas. C. Clear and grub the fueling area to remove unsuitable materials. Place geotextile fabric as permeable separator to prevent mixing of coarse aggregate with underlying soil. Overlap fabric a minimum of 6 inches. Place coarse aggregate on top of the geotextile fabric to minimum depth of 8 inches. D. Grade protection area and driveway to provide sufficient drainage away from stabilized areas. Use sandbags, gravel, boards, or similar methods to prevent sediment from entering public right-of-way, receiving stream or storm water conveyance system. The driveway to the fuel tank area shall have a minimum width of 15 feet for one-way traffic and 30 feet for two-way traffic. E. Place the aboveground storage tank on top of the cast-in-place or pre-cast foundation. The size and thickness of the foundation shall based on the size and weigh of the tank to be used, with a minimum thickness of 6 inches. The concrete foundation shall be enclosed by a 5-inch by 5-inch concrete curb and shall extend a minimum of 1 foot beyond the tank and dispenser assemblies, so that leak and drip can be contained within the concrete foundation. F. Slope the concrete foundation a minimum of 1 percent toward a 6-inch wide by 12- inch long by 4-inch deep sump pit. Install a minimum of 2-inch pipe inside the sump pit with a valve on the outside of the curb to allow draining of the concrete foundation. G. Install a portable concrete Jersey Barrier around the concrete foundation. Provide a minimum clearance of 2 feet from the edge of the foundation. In lieu of the jersey barrier, Contractor can install 4-inch diameter steel pipe bollards around the foundation. The bollards shall be buried a minimum of 3 feet deep, 3 feet aboveground, and 4 feet on center, encased in a 12-inch wide concrete foundation Maintenance A. Inspections shall be conducted by the designated health and safety officer qualified to conduct heath and safety inspections. B. Inspect stabilized areas after every storm event and at least once a week. Provide periodic top dressing with additional coarse aggregate to maintain the required depth. Repair and clean out damaged control measures used to trap sediment. C. Inspect fuel tank foundation s bermed area after every storm event and at least once a week. Visually examine storm water contained in the tank s bermed foundation area

5 for oil sheen or other obvious indicators of storm water pollution. Properly dispose of the storm water when pollutant is present. Record visual examination of storm water discharge in a Report noting the date and time of examination, name of examiner, observations of water quality, and volume of storm water discharged from the bermed area. The Report shall be kept together with all other storm water pollution control inspection reports on the site, in a readily accessible location Temporary Fueling Area Closure The temporary vehicle and equipment fueling area shall be disposed of by removal of all sediment and erosion controls properly offsite. Engineer will inspect the top soils in the fueling area and immediate vicinity for evidence of fuel leaks. If the Engineer determines that sufficient pollutants have been released, the soil shall be removed and properly disposed offsite. Other remediation method may be required Measurement and Payment A. Unless indicated in Document Bid Tabulation Form, the Temporary Vehicle and Equipment Fueling Area is incidental to the Work. Include costs for Temporary Vehicle and Equipment Fueling Area in the cost of work for which it is required. B. When indicated in Document Bid Tabulation Form, measurement and payment for Temporary Vehicle and Equipment Fueling Area will be on a lump sum basis. The Temporary Vehicle and Equipment Area measured as stated, will be paid for at the unit price bid for Temporary Vehicle and Equipment Fueling Area, Complete in Place. Payment for Temporary Vehicle Fueling Area will include and be full compensation for all labor, equipment, materials, supervision, and all incidental expenses for construction of these items, complete in place, including, but not limited to, embankment and excavation, concrete foundation and curbs, protection barrier, driveway, maintenance requirements, repair and replacement of damaged sections, removal of sediment deposits, redressing of aggregates and stones, and removal of erosion and sedimentation control systems at the end of construction