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• DDJC-Sharpe Permanenezometer Installation rk Plan Addendum GMS Boundary Condition Vei'fication immediately before it is to be placed in the 3.4 Site Management boring. 3.4.1 The goal of site management is to on- 3.2.3 Each piezometer screen will consist of a duct all field operations in an appropriate and 1-inch nominal diameter,Schedule 40 PVC efficient manner while minimizing impac s to continuous slot screen with flush threads. The roadway traffic.This goal will be met by screen will be of sufficient size and design to establishing effective communication between hold back and support the filter pack and in-situ the contractor and local authorities,and through soils surrounding the screen. The piezometer planning and preparation prior to beginni g the screen will include a"pre-packed"filter pack field investigation.All piezometer locatic is will along the full length of the screen. The be 5 to 10 feet from pavement edges,whi h will piezometer will have a bentonite/grout seal allow the CPT rig to be out of direct tra above the filter pack that will be hydrated after however,orange traffic cones will be pla d emplacement. A water tight, 6-inch diameter along the road next to the CPT rig during teld subsurface utility box will be installed over the activities. top of each piezometer.The top of each utility box will be completed slightly above the 3.4.2 The DDJC-Sharpe point of contact surrounding grade and concrete will be sloped to (POC)for this field effort is John Guzmai i at allow water to drain away from the protective (209)8394129. well box. 3.4.3 URS will immediately report via 3.3 Site Reconnaissance, telephone to the DDJC-Sharpe POC,or th Preparation, and Restoration designee,any data or results generated du 'ng this investigation that may indicate an imniment 3.3.1 Placement of all proposed CPT boring health risk.Following this telephone noti ca- locations will be verified with USA to avoid tion,a written notice will be prepared and encountering any underground utilities. Each delivered within three days. This special tifi- CPT location will be marked prior to contacting cation shall include supporting documentation. USA for utility clearance. 4.0 DATA ASSESSMENT AND 3.3.2 Emergency equipment(e.g., fire exting- REPORTING uishers,personnel safety equipment, etc.)will be kept at each site where work is being con- Data assessment and reporting will be per. ducted.Each work crew will be equipped with a formed in accordance with the Comprehensive mobile phone to communicate with the DDJC- Field Work Plan(URS, 2001). Sharpe staff or local authorities in order to quickly alert the appropriate emergency service 4.1 Data Assessment should their assistance be required. 4.1.1 The data collected or compiled duri g the 3.3.3 The objective of the site restoration is to subsurface investigations generally will include: leave the area of work as it was originally. Unused boring materials, stakes, and flagging • Northing and easting coordinates; will be removed from each site at the conclusion of work. No increases in erosion potential are • Top of casing and ground surface elev - anticipated as a result of this work. tions; and • Groundwater elevations. K:\02238\Sharpe Piez WP\CPT addendum Sharpe.doc 4 Mw ch 2002