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Geosyntec <br /> consultants <br /> Geosyntec HSE Procedures referenced herein are available on Geosyntec's HSE SharePoint site TASK HAZARD ANALYSIS <br /> and should be consulted,as appropriate,to ensure requirements are met.This THA has been (Ver.4.0,9.8.2023) <br /> prepared per"HSE STD-105.Proiect Safety Management Handbook" <br /> Part A — PROJECT/TASK INFORMATION <br /> Project/Site Name: Rough and Ready Island F Project Number/Org:F WR2501 E <br /> Site Address: Rough and Ready Island,Port of Stockton,California <br /> Task&Worksite Confluence Environmental will perform groundwater sample collection of dozens of wells throughout Rough and Ready <br /> Description: Island in the third quarter of 2025.Bladder pumps will be used to purge wells according to low-flow sampling techniques <br /> and collect groundwater samples under the direction of Geosyntec.During purging,field parameters will be collected <br /> using a water quality meter with a flow-through cell.Well water levels will also be gauged using a water level meter.A <br /> PID will be used to monitor VOC concentration in the breathing zone. <br /> Purge water will be collected in 55-gallon drums and temporarily stored on-site as investigative-derived waste(IDW).All <br /> IDW generated will be removed off-site and disposed of by American Integrated Services of Wilmington,California <br /> (AIS). <br /> Geosyntec Personnel: Name Office Phone Cell Phone <br /> Site Safety Lead/OfficerMorgan Carlson 510-285-2747 864-354-6248 <br /> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------- -------------------------------------- <br /> Task Technical LeadMorgan Carlson 510-285-2747 864-354-6248 <br /> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------- -------------------------------------- <br /> Project ManagerRosemarie Thomas 510-285-2795 603-533-1917 <br /> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------- -------------------------------------- <br /> Project DirectorAnju Wicke 510-285-2703 415-720-3320 <br /> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------- -------------------------------------- <br /> Local HSE CoordinatorJason Gross 510-285-2745 626-321-5954 <br /> .................................................................................................................................................................................... ..................................................... ...................................... <br /> Regional HSE ManagerMadison McLaughlin 858-674-6559 951-990-2888 <br /> ..................................................................................................................................................................................... ..................................................... ...................................... <br /> Corporate HSE Director Bob Poll 831-379-4420 813-240-9231 <br /> On-Site ® Applicable; provide company name,work task and contact information for each Geosyntec <br /> Subcontractor(s): subcontractor below: <br /> ❑ Not Applicable Confluence Environmental—Eric Holmberg 530-906-5728 <br /> Client,Contact(s): Jason Cashman 209-946-0246 1 209-817-5245 <br /> ETHICS POINT HOTLINE US&Canada:844-231-3371 Australia:800-551-155 or 800.811.011 <br /> UK:800-89-0011 or 800-89-0011 Ireland:800-222-SS288 or 800-500-000 <br /> Geosyntec° Task/Project Name: Groundwater Gauging and Sampling <br /> THA Date:4/17/2025 Page 1 <br /> consultants <br />