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HEALTH AND SAFETY EVALUATION-FORM 3 Hazard Assessment Background Review: ® Complete ❑ Partial If partial why? Activities Covered Under This Plan: No. Task/Subtask I Description Schedule I Soil sampling One 4-point composite surface soil sample will be collected from each of the 12 March 2019 DUs across the Site and will be analyzed for lead.One 4-point composite shallow (tentative) subsurface(approximately 2 ft bgs)soil sample will be collected from each of the 12 DUs across the Site(to be colocated with the surface soil samples)and will be analyzed for lead.Three soil borings will be advanced across the site to a total depth of approximately 20 ft bgs using direct-push methodology.Soil will be screened for organic vapors using a photo-ionization detector(PID)at 4-ft intervals.Soil samples with elevated organic vapors(as measured with the PID)and/or samples collected from approximately 10 and 20 ft bgs will be analyzed for lead,TPH-g,TPH-d,TPH- mo,PAHs,and VOCs. 2 Soil Gas Sampling. Soil vapor borings will be installed using direct push methodology at five, March 2019 approximately evenly-spaced locations across the Site to a total depth of (tentative) approximately 20 ft bgs.Soil will be screened for organic vapors using a PID at 4-ft intervals and soil samples may be submitted for analysis if elevated levels of organic vapors are encountered.At each boring,soil vapor probes will be installed at two selected depths(dependent on lithology)targeted for 5-7 ft bgs and 10-15 ft bgs. Soil vapor samples will be analyzed by VOCs/TPH-g via EPA Method TO-15 and for TPH-d via EPA Method TO-17 orequivalent). Types of Hazards: The number 1 refers to one of the following hazard evaluation forms. Complete hazard evaluation forms for each appropriate hazard class. Physiochemical 1 Chemically Toxic 1 Radiation 3 Biological 2 ❑ Flammable ❑ Inhalation ® Carcinogen Ionizing: ❑ Etiological Agent ❑ Explosive ® Ingestion ❑ Mutagen ❑ Internal exposure ® Other(plant,insect,animal) ❑ Corrosive ® Contact ❑ Teratogen ❑ External exposure ❑ Reactive ® Absorption ❑ 02 Rich ❑ OSHA 19 10.1000 Substance Non-ionizing: ® Physical Hazards 4 ❑ 02 Deficient (Air Contaminants) ® UV ❑ IR ® Construction Activities ❑ OSHA Specific Hazard ❑ RF ❑MicroW Substance Standard (Refer to following page for Laser listing) Source/Location of Contaminants and Hazardous Substances: Directly Related to"Tasks Indirectly Related to Tasks—Nearby Process(es)That Could Affect Team ❑ Air Members: ❑ Other Surface ® Client Facility/WESTON Work Location ❑ Groundwater ❑ Nearby Non-Client Facility ® Soil Describe: ❑ Surface Water ® Have activities(task[s])been coordinated with facility? Yes ❑ Sanitary Wastewater ❑ Process Wastewater ® Other 4 of 23