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� <br /> , <br /> » � <br /> ' <br /> DRILLING, WELL CONSTRUCTION AND SAMPLING PROTOCOL <br /> � <br /> � <br /> DRILLING <br /> ( <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 pro ed <br /> work. All necessary permits will be obtained and 48 ur <br /> notification to the lead agency will be given prior to: the <br /> commencement of drilling. , <br /> , <br /> � <br /> Borings will be drilled using hollow-stem auger w�th no <br /> less than 3 1/4-inch diameter ( ID> and 6 3/4 outside diameter <br /> (OD) . All drilling equipment will be thoroughly steam�- � <br /> c1eaned 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 S il Classification System. The ool^o r <br /> , <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:7� <br /> bearing zones and the depths at which they were encountered <br /> will be noted on the logs. All logs will be reviewed ' y a <br /> California State Registered Civil Engineer and verified <br /> correct. A sample of the material logged is to be col,leoted <br /> and retained for further analysis and verification. . <br /> The borings will be drilled in such a manner as t' <br /> prevent cross-contamination between strata. Exploratory !oil <br /> borings will be backfilled with a bentonite or bentoni e and <br /> cement slurry. If a deeper aquifer is to be investigated, <br /> conductor casing will first be grouted into place to seal off <br /> the upper aquifer (s) , in series if necessary, and drilling <br /> will proceed through the conductor casing after the griut has <br /> been allowed to set properly. If evidence of contaminition <br /> is noted during drilling, the drilling will be halted ntil <br /> the responsible professi6nal determines the advisability of <br /> , <br /> deeper drilling. <br /> Upon termination, borings into the saturated zone U( wi l l <br /> either be completed as monitoring or extraction/injection <br /> wells, or backfilled with a bentonite or cement slurry. All <br /> borings for wells will be of a diameter at least 4 inches <br /> greater than the inside diameter of the well casing to be <br /> used, ' <br /> ; <br /> ' <br /> The cuttings from the drilling operation will be � <br /> containerized in plastic 55-gallon drums and stored on0site � <br /> for later treatment and/or disposal. The treatment/d ^ posal <br /> will remain the responsibility of the client unless other <br /> arrangements have been made. It is intended that the <br /> k <br /> : <br />