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SAP/QAPP Addendum Lodi-125 N Stockton Final March 24,2025 Table 5-1: Sample Summary No. of Matrix Location Depth or Other Analysis Samples Descriptor Building Interior and exterior Bulk material from 100 building components of floors,walls,ceilings, Asbestos Materials unoccupied office building and pipes Interior and exterior 15 Paint Chips building components of Painted surfaces Lead unoccupied office building Building Interior and exterior Suspect caulk from 10 windows and other areas building components of PCBs Materials unoccupied office building Within and adjacent to 0.5-1 feet bgs, Arsenic,lead,TPH- 21 Soil historical MGP 2-3 feet bgs, DRO,TPH-GRO, footprint 3-5 feet bgs and PAR 5-8 feet bgs, 8-10 feet bgs, Arsenic,lead and 16 Soil Historical UST TPH-DRO,TPH- 10-13 feet bgs, GRO 13-15 feet bgs 40 Soil Gas Throughout Site 5 feet bgs, VOCs,Helium 15 feet bgs 5 Indoor air Unoccupied Office —5 feet above floor VOCs Building 1 Outdoor Air Unoccupied Office —5 feet above floor VOCs Building Notes: bgs Below ground surface No. Number MGP Manufactured Gas Plant PAH Polycyclic aromatic hydrocarbon PCB Polychlorinated biphenyl TBD To be determined TPH Total petroleum hydrocarbons UST Underground Storage Tank VOC Volatile organic compound 5.2 Analysis Laboratory Standard turnaround times and detection limits for the methods cited in Site-Specific QAPP Worksheet #15 will be adequate for this investigation.Appropriate containers and physical and chemical preservation techniques will be applied during field activities to help verify acquisition of representative analytical results. Building materials, soil,soil gas,and indoor air sample analysis by the analytical laboratory will be in accordance with the analytical methods listed in Site-Specific QAPP Worksheet#19.Analytical laboratories to be used are listed in Table 5-2. 44