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SHALLOW INJECTION WELL INSTALLATION WORK PLAN <br />arcadis.com <br />2022.02.15 OCC Lathrop_Shallow Injection Well Installation Work Plan_final i <br />CONTENTS <br />1 Introduction ............................................................................................................................................. 1 <br />2 Site Background ...................................................................................................................................... 1 <br />2.1 Lithology and Hydrogeology ........................................................................................................... 1 <br />2.2 Remediation Systems and System Expansion ............................................................................... 1 <br />2.3 Injection Network and Capacity ...................................................................................................... 2 <br />3 Work Plan Objective ............................................................................................................................... 3 <br />4 Shallow Injection Well Installation ........................................................................................................... 3 <br />4.1 Pilot Boring and Injection Well Installation Activities ...................................................................... 4 <br />4.1.1 Pre-Field Activities ............................................................................................................... 4 <br />4.1.1.1 Health and Safety ...................................................................................................... 4 <br />4.1.1.2 Underground Utility Clearance .................................................................................. 4 <br />4.1.1.3 Permits ....................................................................................................................... 4 <br />4.1.1.4 Proposed Grouting Method and Drilling Fluid Review ............................................... 4 <br />4.1.2 Field Activities ...................................................................................................................... 5 <br />4.1.2.1 Pilot Boring Installation .............................................................................................. 5 <br />4.1.2.2 Injection Well Installation ........................................................................................... 5 <br />4.1.2.3 Filter Pack Installation and Grouting.......................................................................... 6 <br />4.1.2.4 Well Development and Well Testing .......................................................................... 6 <br />4.1.3 Well Survey ......................................................................................................................... 7 <br />4.1.4 Investigation-Derived Waste Management ......................................................................... 7 <br />5 Schedule and Report .............................................................................................................................. 7 <br />6 References .............................................................................................................................................. 7 <br /> <br />FIGURES <br />Figure 1 Site Location Map <br />Figure 2 Site Plan <br />Figure 3 Preliminary Injection Well Design <br />