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s t i I 8.2 DRILLING SAFETY The following safety measures must be followed during drilling/boring activities: 1. Underground utilities such as gas, water mains and electrical lines should'be located prior to drilling. 2. The presence of underground structures such as crypts, tanks, vaults, etc. should be determined. 3. Drill rigs should not be positioned within three feet of excavations where caving might occur. 4. Overhead clearance of masts, kellys and other structures should be pre-determined. 5. Drilling rigs should not be erected within ten feet of overhead power lines. 6. The potential for the emanation of toxic and ignitable vapors during drilling is possible. Therefore, monitoring for suspected contaminants and/or combustible vapors is i required. Drilling activites should be secured and sources of ignition secured if I combustible vapor levels in excess of 10% of the LEL are encountered. 7. Set brakes and chock wheels of portable rigs prior to operation. 8. Loose clothing and long loose hair should not be worn in the vicinty of rotating auger, kelly or other equipment. 9. Guards and drive shields should not be removed. ; 10. Exhaust from engines or other combustion units should be directed away from work area. 11. Hearing protection must be worn at all times during operation. J '4 12. Since recovery of the sampler encompasses repeated manipulation of the drill rig and l sampler, workers are alerted to exercise extreme caution while performing these tasks. 13. Most tasks involving the drill rig and sampling devices are repetitive and extra care should be taken to protect hands and fingers while working with heavy machine driven equipment. 14. No worker shall handle soil samples or cuttings without wearing the proper protective equipment.. 15. No employee other than the designated, licensed operator shall operate drilling equipment. C 1 � I