Permits & Development - Encroachment(EP)/Driveway(DW) Permits - 2007_EP-07-301 thru EP-07-400_ - EP-07-352

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NON-STORM WATER MANAGEMENT Water Control and Conservation The Contractor shall prevent erosion or the discharge of pollutants into storm drain systems or watercourses by managing the water used for construction operations. The Contractor shall obtain the Engineer's approval before washing anything on the construction site with water that could discharge into a storm drain system or watercourse. Discharges shall _ be reported to the Engineer immediately. The Contractor shall implement water conservation practices when water is used on the construction site. Irrigation areas shall be inspected and watering schedules shall be adjusted to prevent erosion, excess watering, or runoff. The Contractor shall shut off the water source to broken lines,sprinklers,or valves,and they shall be repaired as soon as possible. When possible, water from waterline flushing shall be reused for landscape irrigation. Paved areas shall be swept and vacuumed,not washed with water. Construction water runoff, including water from water line repair, shall be directed to areas to infiltrate into the ground and shall not be allowed to enter storm drain systems or watercourses. Spilled water shall not be allowed to escape water truck filling areas. When possible, the Contractor shall direct water from off-site sources around the construction site, or shall minimize contact with the construction site. Illegal Connection and Discharge Detection and Reporting The Contractor shall inspect the construction site and the site perimeter before beginning work for evidence of illegal connections, discharges, or dumping. Subsequently, the construction site and perimeter shall be inspected on a frequent, predetermined schedule. The Contractor shall immediately notify the Engineer when illegal connections,discharges,or dumping are discovered. The Contractor shall take no further action unless directed by the Engineer. Unlabeled or unidentifiable material shall be assumed to be hazardous. The Contractor shall look for the following evidence of illegal connections,discharges,or dumping: A. Debris or trash piles, B. Staining or discoloration on pavement or soils, C. Pungent odors coming from drainage systems, D. Discoloration or oily sheen on water, E. Stains or residue in ditches,channels or drain boxes, F. Abnormal water flow during dry weather, G. Excessive sediment deposits, H. Nonstandard drainage junction structures,or I. Broken concrete or other disturbances near junction structures. Vehicle and Equipment Cleaning The Contractor shall limit vehicle and equipment cleaning or washing on the construction site to that necessary to control vehicle tracking or hazardous waste. Vehicles and equipment shall not be cleaned on the construction site with soap, solvents,or steam until the Engineer has been notified. The resulting waste shall be contained and recycled,or disposed of as provided in"Liquid Waste"or"Hazardous Waste" of these special provisions,whichever is applicable. The Contractor shall not use diesel to clean vehicles or equipment,and shall minimize the use of solvents. The Contractor shall clean or wash vehicles and equipment in a structure equipped with disposal facilities. If using a structure is not possible, vehicles and equipment shall be cleaned or washed in an outside area with the following characteristics: A. Located at least 15 in from storm drainage systems or watercourses, B. Paved with asphalt concrete or portland cement concrete, C. Surrounded by a containment berm,and D. Equipped with a sump to collect and dispose of wash water. When washing vehicles or equipment with water, the Contractor shall use as little water as possible. Hoses shall be equipped with a positive shutoff valve. Wash racks shall discharge to a recycle system or to another system approved by the Engineer. Sumps shall be inspected regularly,and liquids and sediments shall be removed as needed. -- Contract No. 10-OM7104 142