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ATTACHMENT B TO WORKPLAN ADDENDUM <br /> Proposed Schedule—Disco.Property Additional Investigation <br /> .. Activity Estimated Completion Time Comments ! <br /> Submit draft revised workplan and June 1998 <br /> addendum to PHS/EHD <br /> PHS/EDH review comments 2 weeks after workplan submittal Estimated,actual duration may <br /> received vary <br /> Submit final workplan 2 weeks after receipt of comments <br /> incorporating PHS/EHD review <br /> comments <br /> PHS/EHD approval of final 2-3 weeks after receipt of final Estimated,actual duration may <br /> workplan and addendum workplan vary <br /> Send out RFP for workplan Within 1 week after written <br /> implementation to three or more approval of workplan by PHS/EHD <br /> consultants <br /> Receive bids from consultants 2- 3 weeks after sending out RFP i <br /> Evaluate bids and select contractor. 2 weeks after receiving bids Estimated,actual duration may <br /> and obtain pre-approval of vim, <br /> PHS/EHD approved workplan <br /> from USTCF <br /> Obtain encroachment permits from 3 weeks after workplan approval Estimated,actual duration may I <br /> Caltrans and City of Stockton - -by PHS/EHD vary.This.activity to be performed 1 <br /> concurrently with contractor <br /> selection and USTCF pre-approval. <br /> Consultant conducts CPT and -- 3 weeks after USTCF pre-approval Assumes encroachment permits <br /> groundwater screening activities and contract award have been obtained,no delays in <br /> mobilizing driller, other <br /> subcontractors. <br /> Supply results of CPT and I week after completion of field Assumes tabulated results;no data <br /> groundwater screening to - activities. visualization update. <br /> PHS/EHD, <br /> I <br /> obtain concurrence in writing on I week after receipt of CPT and Estimated,actual duration may <br /> exact locations and depths of wells groundwater screening data. vary. Significant changes to <br /> proposed in workplan. workplan activities may require <br /> pre-approval by USTCF and re- <br /> bidding. <br /> I <br /> Selected consultant conducts soil 2 weeks after PHS/EHD - Assumes no delays in mobilizing <br /> boring, monitoring well concurrence on scope of work. driller,other subcontractors or <br /> installation,and other field oversight scheduling. <br /> activities in workplan, as amended <br /> above.'. <br /> I <br /> Consultant prepares report on 3 -4 weeks after completion of <br /> investigation activities. field activities <br /> i <br /> 1 <br /> PAGE 1 OF 2 <br /> WPSCHEDULE2.D)OC <br />