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20100073 Project Narrative 040810Olympic Pipe Line Company 14 -inch Petroleum Products Pipeline New Motor - operated Valve Installation Milepost 157 Yelm, Washington Project Narrative Submitted to: City of Yelm Prepared by: Olympic Pipe Line Company 2319 Lind Avenue SW Renton, WA 98057 April 8, 2010 Im (U M E M AP ; 2!111 BY- -- --- ---- -- -- -- INTRODUCTION The Olympic Pipe Line Company (Olympic) operates a petroleum products pipeline system within western Washington and northern Oregon, which includes a 14- inch - diameter pipeline extending through Yelm, Washington. This narrative summarizes the proposed project, which consists of installing a new motor - operated aboveground valve on the pipeline at Olympic's Milepost 157. The purpose of this submittal is to assist City of Yelm in their review of our civil plans for the project. This narrative provides a description of the proposed valve location and project work activities. The accompanying drawings show the site vicinity, details of the proposed valve location, layout for the proposed motor - operated valve, and equipment details. The Mountain Sunrise Homeowners Association voted to allow the aboveground valve and encompassing fence structure to be installed on its property; Olympic currently holds an easement for their pipeline at this location. SITE DESCRIPTION The proposed Milepost (MP) 157 motor - operated valve will be located in the northern corner of tax parcel number 63540000003. The proposed valve site will be located approximately 150 feet north of the intersection between 91" Avenue Southeast and Paradise View Street Southeast; an enhanced gravel approach from the existing road to the valve site is proposed. The subject property is in a residential development, but is undeveloped and currently used for two stormwater retention ponds. The proposed valve site would be located between the two ponds. The ground surface at the proposed valve site is generally flat. PROJECT DESCRIPTION This section describes the general construction sequence for the new valve installation. • The Contractor will install erosion control best management practices (BMPs), a temporary construction entrance of imported quarry spalls, as necessary, and then mobilize equipment to the site. • The existing surface will be grubbed to remove any grass, roots and organic material. • The existing pipeline will be excavated, a section cut out, and a new section of aboveground pipe with the motor- operated valve added. • The excavated soil will be protected from erosion prior to its subsequent use as backfill. If precipitation is forecast, the stockpile will be covered at the end of the day with plastic sheeting. • New power and communications service will be connected to current facilities in the neighborhood, and extended to a pedestal location within the proposed valve enclosure. • The excavated soil will be backfilled over the pipeline and compacted to re- establish the current grade elevation. • An approximate 16 -foot by 14 -foot concrete pad will be poured in the new valve location and used for support of the valve. • The aboveground portion of the facility will include steps to access the valve and a power /communications pedestal. • Gravel will be placed around the concrete pad. An approximate 40 -foot by 26 -foot chain -link fence will be constructed and placed around the aboveground pipe and pedestal, and surround the gravel area. • The disturbed areas at the work site outside the fence will be re- graded, as necessary. • The Contractor will sweep their truck tires, as necessary, as they leave the site to prevent tracking of soil onto 91" Avenue Southeast. If soil is tracked onto the road, the road will be swept on a daily basis. • Pave a 20 -foot long asphalt approach at the access entrance on 9151 Avenue SE. Total material excavation volume generated at the proposed valve site is estimated to be 263 cubic yards. That soil will be used as backfill. An additional approximate 78 cubic yards of quarry spalls for the temporary construction entrance and gravel for the enhanced gravel access and surface within the fenced enclosure will be imported. BMPS FOR PREVENTING AND CONTAINING PETROLEUM SPILLS To prevent petroleum products or other material from contaminating soils and water bodies during vehicle and equipment maintenance, the following BMPs will be implemented: • Construction equipment and vehicles will be properly maintained to prevent leaking of petroleum products. • Specific staging areas for equipment and vehicle maintenance will be established away from wetlands, water bodies and drainage pathways. • Drip pans and tarps or other containment systems will be used when changing oil and other vehicle and equipment liquids. • Any contaminated soils or material will be disposed of off site in proper receptacles or at an approved disposal facility. • Vehicle and equipment fueling will be attended at all times by site personnel. • Spill cleanup materials will be stored on site and employees will be trained in spill control procedures. SCHEDULE The valve work must be completed during a scheduled pipeline shutdown. At this time, the schedule for the proposed valve replacement is not in place; however, it is anticipated that the work will occur sometime during September 2010. The project is anticipated to be completed and the site restored within four weeks.