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AOL <br />W 0 <br />Clayton Group Services Page 2 <br />Standard Operating Procedures <br />SPO -5 - Monitoring Well Installation <br />3. Following the Work Plan, review all available "as-builts" and any other information <br />that can be obtained from the Client on the location of underground utilities and other <br />subsurface interferences. <br />4. Visually inspect the proposed drilling area for any interferences to drilling, and check <br />for overhead interferences such as overhead lines. <br />5. Mark all proposed drilling locations with white marker paint. Contact Underground <br />Service Alert (Dig Alert) at 1-800-422-4133 two to fourteen days prior to the drilling <br />date and obtain a Dig Alert Number. Dig Alert needs to have the Thomas Guide page <br />number and coordinates of the proposed drilling. Also, be sure to add the drilling <br />contractors name to the Dig Alert ticket. <br />6. If possible, conduct a geophysical survey, using a geophysical subcontractor <br />(Spectrum, ULS), to further identify any potential subsurface interferences to drilling. <br />7. Based on these sources of subsurface information and the Work Plan, locate and <br />mark drilling locations. Proposed monitoring well locations should be located away <br />from known or potential sources of contamination, in areas protected from flooding, <br />and an adequate distance from buildings and other structures to allow access for safe <br />drilling and well installation, and subsequent well maintenance, modification, repair, <br />and destruction. <br />8. On the day of the monitoring well installation and prior to the start of drilling, <br />conduct a "tail -gate" meeting with the drillers and all other on-site personnel to <br />review the scope of work and all concerns of the Health and Safety Plan and have <br />personnel present read and sign the Health and Safety Plan. The pre -drilling review <br />should also include knowing the location of the "kill switch" on the drill rig. This is <br />also a good time to check with the driller to be certain that he has the proper augers, <br />casing, decontamination equipment, etc. and understands the soil sampling program. <br />9. At the start of drilling, and after the surface concrete or asphalt, if present, has been <br />cut, it generally is advisable to hand auger the first 10 feet to minimize the possibility <br />of hitting and breaking unidentified subsurface interferences. <br />10. The monitoring well borehole diameter should be at least 4 inches greater than the <br />outside diameter of the casing, typically using hollow -stem augers to drill the boring. <br />11. Monitor for volatile organic vapors as the boring is drilled, generally using a <br />photoionization detector (PID). <br />12. Log all borings, take photographs, prepare boring logs, and maintain a detailed field <br />logbook as described in Standard Operating Procedure - Field Logbook/Photographs, <br />SOP -4. Many regulatory agencies require that any technical submittals to them be <br />signed by a Registered Geologist (RG), Certified Engineering Geologist (CEG). <br />S:\Ennr\Proj` SPOs\SOP-5.doc <br />