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ENSAFE PRE-DRILLING/EXCAVATION UTILITY CHECKLIST(EXPLANATIONS AND TIPS) The instructions below have been developed to assist field personnel in accomplishing the tasks on the front of this form. If at any time field personnel are unclear on how to perform these necessary pre-job steps, refer to the Qualified Safety Reviewer list on the EnSafe Intranet. A =To be accomplished during planning stages (B)=To be accomplished onsite before fieldwork activities UNDERGROUND UTILITIES(PUBLIC AND PRIVATE PROPERTY) 1(A). This is REQUIRED no matter if the work area is on public or private property. Borings/excavations should be located onsite before One-Call notification, if possible, with WHITE paint/flagging. Update One-Call every 2 weeks, and locators need 3 working days to mark all utilities within the work area, 2(A). This maybe accomplished by to%phone/internet. Most state-specific one-call agencies are open 8AM-5PM local time, Monday thru Friday. 3(A&B). This may happen the morning of the drilling/excavation activities to be performed. All personnel need to be aware of underground utilities within (or near) the work area. Offsets may be performed to minimize the probablIlty of encountering underground utilities 4(B). Example: light posts, valve pits, pit covers, curb/gutter inlets, manholes, surface indentations, saw cut areas, etc. This /s best performed during the pre-bid site visit, but may be performed immediately before activities. 5(B). One-Cal/ color markings typically are as follows WHITE (Excavation/Borings), RED (Power/Electrical), YELLOW(Gas/Petroleum), ORANGE(Communication/Fiber Optics), BLUE(Potable Water), GREEN(Sanitary/Storm Sewer). Review all colors and positions with field personnel pnor to beginnIng beginningdrill/n /excavatin . 6(A&B). This refers to simply looking at the underground utilities onsite and plotting them (by hand initially) on the site drawing or aerial. 7(B). If NO,please explain. After al/underground utilities have been plotted on the draw/ng, review the locations with the EnSafe PM, al/personnel(including subcontractors), and the client/f deemed necessary. This will help to orient all field personnel as to the location of the underground utilities within or near work operations. If the util/t/es are marked w/th/n a 3 horizontal feet lateral d/stance of the boring/excavat/on, offsets SHOULD be considered. 8(B). This refers to the use of a private utility locator to assist in locating underground utilities on private property that haven't been located by the One-Call system. This /s highly dependent upon the makeup of the underground utility(metal, plastic, clay terra cotta, etc.)and complications due to rebar within concrete, multiple utilities crossing points, etc. Only previously trained personnel (most likely private utility locator and/or geophysical subcontractors) should use these devices. The Qual/fied Safety Reviewer AND the EnSafe PM AND the client will make the decision TOGETHER if a private utility locator is required. 9(B). Example — hand augers, probe rod, vacuum extraction, air knife, post-hoe digger, etc. This is NON- NEGOTIABLE for drilling activities. Every boring must be advanced(without mechanical means) to a depth of four (4) feet below ground surface (or maximum boring depth if boring term/nal depth /s less than 4 feet). Only exception is where large boulder or bedrock in within the top 4 feet of the boring. Boring may be ha/ted at a depth less than 4 feet if it is confirmed and documented that the boring is blocked by rock with apparent diameter greater than that of the boring/trial hole. 10(B). This is site-specific, but usually no closer than 3 horizontal feet from any and all underground c utilities (especially /fines with high pressure or voltage/flammabl%ombustib/e substances). The safe distance for overhead utilities is 10 horizontal- 10 vertical feet(up to 50kV). Stay alert at al/times. All Zpersonnel(EnSafe and Subcontractors)have stop work authority in reference to underground utilities. No ° job is too Important to compromise safety. W 11(B). The depth/alignment of the underground utility to be crossed should be determined to prevent damage to each buried utility. Insert Field Notes/Concerns Here: Revised March 27, 2017