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A=COM • Drilling operations on an MEC/UXO site will not be conducted until a complete plan for the site is prepared and approved by the AECOM UXO Safety Officer. MEC/UXO avoidance shall be conducted during drilling operations on known or suspect MEC/UXO sites. • The UXO team will identify and distinctly mark the boundaries of a clear approach path for the drilling crews, vehicles, and equipment to enter the site. This path will be, at a minimum, twice the width of the widest vehicle. No personnel will be allowed outside any marked boundary. • If MEC/UXO is encountered on the ground surface,the UXO team will clearly mark the area where it is found, report it to the proper authorities, and divert the approach path around it. • The UXO team will conduct an access survey using the appropriate geophysical instrument over the approach path for avoidance of MEC/UXO that may be in the subsurface. If a magnetic anomaly is encountered, it will be assumed to be MEC/UXO, and the approach path will be diverted around the anomaly. UXO personnel only will operate the appropriate geophysical instrument and identify MEC/UXO. • An incremental geophysical survey of the drill-hole location(s)will be initially accomplished by the UXO team using a hand auger to install a pilot hole. If MEC/UXO is encountered or an anomaly cannot be positively identified as inert material, Hazardous,Toxic, and Radioactive Waste (HTRW)sampling personnel will select a new drill-hole location. • Once the surface of a drilling site has been cleared and a pilot hole established as described above,the drilling contractor will be notified that the site is available for subsurface drilling. 4.21 Movement and Transport of Drilling, Boring or Direct-Push Equipment 4.21.1 Personnel transporting equipment shall be properly licensed and shall operate the vehicle according to Federal/State/Provincial/Territorial, and local regulations. Refer to S3AM-005-PR1 Driving and S3AM-320-PR1 Commercial Motor Vehicles. 4.21.2 Confirm the traveling height(overhead clearance),width, length and weight of the equipment with the carrier. Identify highway and bridge load,width and overhead limits, to confirm these limits are not exceeded and with adequate margin. 4.21.3 Allow for overhang of any drilling, boring or direct-push equipment when cornering or approaching other vehicles or structures. 4.21.4 Be aware that the canopies of service stations and motels are often too low for equipment loaded on a trailer to clear 4.21.5 Watch for low hanging electrical lines, particularly at the entrances to drilling sites or restaurants, motels, other commercial sites. 4.21.6 Never travel on a street, road, or highway with any part of the drilling, boring or direct-push equipment in a raised or partially raised position. 4.21.7 Remove all ignition keys if rig is left unattended unless client requirements specify that the keys remain in the ignition switch at all times. 4.21.8 Before moving a rig on location,the operator shall do the following: • To the extent practical,walk the planned route of travel and inspect it for depressions, gullies, ruts, and other obstacles. • Check the brakes of the truck/carrier, especially if the terrain along the route of travel is rough or sloped. • Discharge all passengers before moving on rough or steep terrain. 4.21.9 Engage the front axle (on 4x4, 6x6, etc., vehicles)before traversing rough or steep terrain 4.21.10 Driving drill rigs along the sides of hills or embankments should be avoided; however, if side-hill travel becomes necessary,the operator shall conservatively evaluate the ability of the rig to remain upright while on the hill or embankment. The possibility shall be considered that the presence of Drilling,Boring,&Direct Push Probing(S3AM-321-PR1) Revision 2 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. Page 11 of 12