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l n QUALITY ASSURANCE/QUALITYNTR CO L O PROTOCOLS The following licensed professional people will be involved in this project Geologist John Cussen Registered Geologist#6505 Environmental Assessor John Cussen, REA 1979 Drillers Will be Frontier Drilling, C-57 License C57-673504 Laboratory Will be Sherwood Labs, Hilmar, CA Protocols Drilling Monitoring Wells All downhole equipment will be decontaminated using steam, to clean off all sod 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) Core samples will be taken every 5 feet A core of the capillary fringe will be obtained The well will be logged geologically and the blow counts will be recorded Also the odor of each sample will be noted and the presence of any free hydrocarbon product 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 marked on the drum The drums will remain stored at the site until the contamination can be assessed through the laboratory sampling 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 1 foot above the last slot At this time the well will be surged for 5 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 hydrated bentonite chips 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 will be cemented in place around and above the top of the casing • The cement or bentonite grout will be placed in the annulus by the use of a tnme pipe if the total annulus seal distance is over 30 feet ( Bul 74-90 Cal Water Well Standards)