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� <br /> � <br /> APPENDIX C <br /> DRILLING AND SAMPLING PROTOCOL <br /> � <br /> DRILLING <br /> � <br /> Prior to any drilling or excavation activities, <br /> Underground Service Alert (USA) will be contacted to mark all <br /> ~ underground utility lines in the vicinity of the proposed <br /> work. All necessary permits will be obtained and 48 hour <br /> notification to the lead agency will be given prior to the <br /> � commencement of drilling. <br /> Borings will be drilled using hollow-stem auger with no <br /> less than 3 1/4-inch diameter ( ID) and 6 3/4 outside diameter <br /> ^~ <br /> (OD) . All drilling equipment will be thoroughly steam- <br /> cleaned before drilling begins to prevent the introduction of <br /> contamination from off-site, and between borings to prevent <br /> ~ cross-contamination' <br /> All borings will be logged by a qualified geologist <br /> ~ using the Unified Soil Classification System' The color, <br /> ' texture, moisture, plasticity (if applicable) , consistency, <br /> pertinent soils or bedrock characteristics, and any evidence <br /> of contamination will be noted on the logs. All water- <br /> bearing zones and the depths at which they were encountered <br /> will be noted on the logs. All logs will be reviewed by a <br /> California State Registered Civil Engineer, Engineering <br /> Geologist or Geologist and verified correct. A sample of the <br /> material logged is to be collected and retained for further <br /> analysis and verification' <br /> -~ The borings will be drilled in such a manner as to <br /> prevent cross-contamination between strata. Exploratory soil <br /> borings will be backfilled with a nine sack sand/cement <br /> ~~ slurry. <br /> The cuttings from the drilling operation will be <br /> containerized in plastic 55-gallon drums and stored on-site <br /> for later treatment and/or disposal. The treatment/disposal <br /> will remain the responsibility of the client unless other <br /> arrangements have been made. It is intended that the <br /> ~� contaminated cuttings be incorporated into the soil treatment <br /> program and abandoned in place after treatment. <br /> `~ <br /> SAMPLE HANDLING <br /> All soil and groundwater samples will be properly <br /> ~ labeled with project number, date collected, and sample <br /> identification number. All samples will be handled using <br /> standard Chain of Custody procedures. Field records will <br /> -^ document the above information and other significant data, <br />