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PROTOCOL INSTALLATION AND DESTRUCTION OF WELLS 1.0 INTRODUCTION This protocol describes the procedures to be followed during the installation or destruction of monitoring, groundwater extraction, and vapor extraction wells. Drilling and logging of soil borings for the well installation will be in conformance with the protocol DRILLING OF SOIL BORINGS.' The procedures presented herein are inte$ded to be of general use and may be supplemented by a work plan and/or health and safety plan. As the work progresses and if warranted, appropriate revisions may be made by the project manager. Detailed procedures in this protocol may be superseded by applicable regulatory requirements. 2.0 WELL INSTALLATION A DAILY FIELD RECORD will be completed for each day of fieldwork, and the original will be kept in the project files. If required, permits will be acquired from the appropriate agency(s), and an underground utility check will be performed before drilling begins. An underground utility check will, at a minimum, consist of contacting a local utility alert service, if available. After well installation, well completion report(s) will be completed and filed with the State Department of Water Resources or the appropriate agency. Each groundwater monitoring well will be designed to enable measurement of the potentio- metric surface and to permit water sampling of a specific water-bearing zone. Each vapor monitoring well will be designed to enable measurement of pressure conditions and permit sampling of a specific zone. The field geologist/engineer, in consultation with the project geologist or engineer, who will be licensed in the state in which the work is performed if required, will specify the screened interval using the lithologic log and geophysical log (if INSTALLATION AND DESTRUCTION OF WELLS Page I of 8 MSCIPROTO-IW.= REVISION DATE:MARCH 1996 IW-1