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2306 32nd St, Everett, WA 98201 <br />Property Access Work Plan <br />Utility Locate (One Call and Private) <br />Prior to drilling, the boring location will be marked, and the One <br />Call service will be notified for public utility locates. <br />Representatives of each utility will then visit the site to mark <br />underground utilities. We will likely also have a private utility locate <br />performed at the site. A private utility locater will use non-invasive <br />measures to locate and mark underground utilities not identified by <br />the public utility locate in the vicinity of the marked boring. <br />Pavement Coring and Vacuum Excavation (Potholing) <br />We will use a core barrel to cut a circular hole through the paved <br />surfaces as applicable. We will then use a vacuum truck to <br />excavate the upper 6 to 8 feet to check for unmarked or <br />mismarked underground utilities. Typical duration for utility <br />potholing is 2-3 hours and may immediately precede the <br />geotechnical drilling <br />Geotechnical Drilling <br />The boring will be drilled using truck- or track-mounted drill rig and <br />is planned to be 100 feet. The boring will be approximately 4 to 6 <br />inches in diameter and will be advanced into the ground using <br />either mud rotary drilling technique. For mud rotary drilling, the <br />borehole is advanced through the soil using a rotary drill bit <br />mounted at the end of drill rods. Drilling fluid is pumped down <br />through the hollow rod string and rotary drill bit, where it entrains <br />drill cuttings and carries them to the surface as the drill mud flows <br />upward to the surface. The drilling fluid and soil cuttings flow into a <br />tub where coarse drill cuttings are screened off for containment <br />and disposal. Drill fluid is recirculated from a mud tub. <br />Soil samples will be obtained using Standard Penetration Tests <br />(SPT) at 2½- or 5- foot intervals to the depth explored. Work <br />activities will be actively managed to minimize work area <br />disturbance. Upon completion of the boring, all material generated <br />during drilling operations will be stored in 55-gallon drums and <br />removed offsite for disposal at a permitted facility by the drill crew. <br />Each boring location will be backfilled according to Washington <br />State Department of Ecology regulations using bentonite chips or <br />bentonite‐grout mixture. The boring location will be patched <br />appropriately with concrete upon completion. <br />SCHEDULE <br />•Sound Transit has committed to 72 hours notification to the City of Everett prior to commencing fieldwork. <br />•Unless other arrangements are made, work will be completed on weekdays (Mon‐Fri) during daylight hours <br />(approximately 7am to 5pm) unless otherwise specified. <br />•Geotechnical investigations are typically completed in 2 to 3 days. <br />TEMPORARY EROSION AND SEDIMENT CONTROL PLAN <br />Soil cuttings from the drilling operations will be drummed and removed from the site. Caution will be used by the <br />drillers and site personnel to prevent unnecessary tracking of soil outside the work zone. The work zone surface <br />will be returned, as close as practical, to pre-drilled condition prior to completion of work. <br />HAZARDOUS MATERIALS PROCEDURES <br />•Hazardous materials are not anticipated to be encountered at this site. If field conditions differ from what is <br />anticipated, and field staff identify soil or groundwater that is possibly contaminated, the project <br />Environmental Coordinator will be contacted immediately for directions. City of Everett will also be notified <br />immediately. <br />•A spill kit will be available at the work site in the event of a spill of fuel or hydraulic fluid. Contaminated <br />materials will be disposed of at an appropriate disposal facility. <br />SPECIAL INFORMATION <br />N/A