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Cardno ERI <br />Surveyina <br />Soil Boring and Well Installation Field Protocol <br />If required, wells are surveyed by a licensed land surveyor relative to an established benchmark of known <br />elevation above mean sea level to an accuracy of +/- 0.01 foot. The casing is notched or marked on one side to <br />identify a consistent surveying and measuring point. <br />Decontamination Procedures <br />Cardno ERI or the contracted driller decontaminates soil and water sampling equipment between each sampling <br />event with a non -phosphate solution, followed by a minimum of two tap water rinses. De -ionized water may be <br />used for the final rinse. Downhole drilling equipment is steam -cleaned prior to drilling the borehole and at <br />completion of the borehole. <br />Waste Treatment and Soil Disposal <br />Soil cuttings generated from the drilling or sampling are stored on site in labeled, Department of Transportation - <br />approved, 55 -gallon drums or other appropriate storage container. The soil is removed from the site and <br />transported under manifest to a client- and regulatory -approved facility for recycling or disposal. <br />Decontamination fluids and purge water from well development and sampling activities, if conducted, are stored <br />on site in labeled, regulatory -approved storage containers. Fluids are subsequently transported under manifest <br />to a client- and regulatory -approved facility for disposal or treated with a permitted mobile or fixed -base carbon <br />treatment system. <br />3 <br />