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• DDJC-Tracy GMS Boundarondition Verification Work Plan <br /> data will be collected from these piezometer • Measurement of groundwater levels at <br /> locations,and they will be removed near the end existing on-site monitoring wells within <br /> of the field effort. Information of specific field DDJC-Tracy boundaries; <br /> investigation methods and standard operating <br /> procedures are presented in Section 3.0. • Removal and abandonment of <br /> temporary piezometer probes; and <br /> 2.2 During one of the days of the field CPT <br /> effort, groundwater levels will be measured at • Collection of groundwater extraction <br /> selected monitoring wells within the DDJC- rate data for the North Balloon, Central <br /> Tracy facility. Table 2-1 provides a list of the Area,and South Balloon treatment <br /> on-site wells that will be used. Groundwater plants. <br /> levels will be measured from 9 wells in each of <br /> the A,B, and C Zones,for a total of 27 3.0 FIELD INVESTIGATION <br /> measurements. Water extraction rates at the PROCEDURES AND METHODS <br /> treatment plants will also be collected during the <br /> field effort. 3.1 Field Operations <br /> 2.3 The objective of this work will be 3.1.1 The location and number of data points to <br /> accomplished through the implementation of the be collected were selected based on required <br /> following activities: boundary verification for the groundwater <br /> model and location of available road right-of- <br /> • Field inspection,marking,and ways. To the extent possible, previous sampling <br /> documentation of the proposed CPT and analysis plans prepared for DDJC-Tracy <br /> locations; were reviewed and incorporated into this current <br /> plan. The procedures presented in this section <br /> • Preparation of this work plan; are designed to ensure that: <br /> • Review and coordination with the City • Data are consistent with project <br /> of Tracy and San Joaquin County, objectives; <br /> including preparation and submission of <br /> encroachment permits for work within • Data are collected in a manner that will <br /> the public road right-of-ways; ensure accuracy,precision, <br /> completeness,representativeness,and <br /> • Notification of Underground Service comparability. <br /> Alert(USA), completion of utility <br /> clearance of the planned CPT locations 3.1.2 All CPT methods will conform to state <br /> by the local utility companies or their and other applicable regulatory requirements. <br /> representatives; All work shall be performed in accordance with <br /> the final Comprehensive Field Work Plan <br /> • CPT at each planned location, including <br /> (Radian, 1998). Changes to this plan will be <br /> dissipation testing to determine water discussed with CEHNC or DDJC-Tracy staff <br /> intervals and placement of temporary and documented. The procedures for performing <br /> piezometer probes to collect the following work are presented in the <br /> groundwater elevation information; reference sections of the final Comprehensive <br /> • A survey will be performed by a Field Work Plan(Radian, 1998). <br /> licensed surveyor to identify the • Location Surveying(Section 2.0); <br /> location and surface elevation of each <br /> CPT location; <br /> t-gms-wp 2 30 April 1999 <br />