ARCHIVED REPORTS XR0010491 - Laserfiche WebLink

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QUALITY ASSURANCE/QUALITY CONTROL `. PROTOCOLS The following licensed professional people will be involved in this project. Geologist: Richard Merriam, Certified Engineering Geologist California Registration # 850. Environmental Assessor: John Cussen, REA 1979 Drillers : Will have a current C-57 Drilling license. Laboratory: Will be a California State Certified Laboratory. Protocols Drilling Monitoring Wells : All downhole equipment will be decontaminated using steam,to clean off all soil prior to use. Wells will be drilled with a continuous flight hollow stem auger. All wells will have a diameter at least 4 inches greater than the casing diameter (OD) . Prior to removing any equipment from the hole the TD will be measured. Once the casing is placed in the hole an accurate measurement of the total amount of casing must be made. The difference between the two figures will be explained by the well logger. All drill cuttings will be placed in drums, sealed and the drilling intervals for the cuttings in each drum will be written on the drum. Completion: Slotted casing (0. 02 inch slots) will be capped with a bottom plug, The slots will extend 5 feet above the estimated water table indicated during drilling. Clean # 3 sand will be placed opposite the slotted casing and 2 feet above the last slot. At this time the well will be surged for 10 to 15 minutes to attempt to eliminate any voids in the sand pack. At the end of the surging the top of the sand will be measured and additional sand will be added if necessary. Directly above the sand a 3 foot plug of bentonite will be placed. Above the plug a seal of cement grout will be placed to the surface. The top of the casing will be capped and a traffic box and will be cemented in place around and above the top of the casing. The well will be developed by bailing within a day of drilling to remove most of the sediment within the casing and to remove