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Mr. Brendan Kenny <br /> July 03, 2019 <br /> • <br /> permanent pump specifications and for assessment of hydraulic capture using methods contained in <br /> USEPA(2008)for analysis of capture zones. The final recommendations and design upgrades will be <br /> documented in a system upgrade report.The overall POC groundwater capture will be assessed using <br /> the existing and new well groundwater capture estimates. <br /> PROPOSED SCHEDULE <br /> Arcadis is prepared to assist/direct activities following regulatory review and approval of this Work Plan. <br /> Approximate timelines for each of the activities are as follows: <br /> • Pre-field activities, including permitting, subcontractor identification and selection, are anticipated <br /> to require approximately two months. <br /> • Monitoring well installation and development/rehabilitation activities are expected to require <br /> approximately two weeks to complete. <br /> • Hydraulic testing activities, including step tests are expected to require approximately two days to <br /> complete. <br /> • System upgrades including conveyance line improvements are expected to require approximately <br /> 3 weeks to complete. <br /> Where possible, Arcadis will complete upgrade activities outlined above concurrent with each other to <br /> expedite completion of the overall project. <br /> Please contact me via phone or email with any questions or concerns. <br /> Sincerely, <br /> Arcadis U.S., Inc. Ar ', <br /> Aaron Hook Sh Roberts. P..h1Y,'CHg <br /> Principal Scientist Senior-de610gi9t--;;-' <br /> Copies: <br /> Don Litchfield, Forward Inc. <br /> Robert McClellon, San Joaquin County Public Health Department, Stockton <br /> Enclosures: <br /> Tables <br /> 1 Proposed Well Construction Details <br /> Figures <br /> 1 Proposed Extraction Well Locations <br /> 2 Cross-Section A-A <br /> 3 POC Groundwater Capture with Additional Proposed Wells <br /> Attachments <br /> 1 Existing Extraction Well Hydraulic Step Test Assessment <br /> • 2 Proposed Extraction Well Construction Diagram <br /> arcadis com Page: <br /> Forward LF GWTS Upgrade WP07032019.docx 7/7 <br />