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SAP/QAPP Addendum Lodi-125 N Stockton Final March 24,2025 most appropriate conditions for collecting the data;and (4) specify performance or acceptance criteria for establishment of quantity and quality of data needed to support the decision.An outline of the process and expected outputs from this project are in Site-Specific QAPP Worksheet#10,listed at the end of this section.This investigation is anticipated to generate definitive data from building materials,soil, soil gas,and indoor/outdoor air.Data generated during this project will comply with the requirements for each data category as defined in Guidance on Systematic Planning Using the DQO Process (EPA 2006). EPA has approved all definitive analytical methods to be applied during this project. The Applicant's redevelopment plan for the Site is to rezone the Site for mixed use.Based on the stated potential future use,protection of future occupants'health based on a commercial exposure scenario is appropriate.If AOCs are present,the following SLs will be used to evaluate AOC concentrations detected in soil, soil gas,ambient air,and hazardous building materials: • The proposed SL for building materials at the Site is any material containing more than 1 percent asbestos per OSHA Title 29 CFR 1910.1001(b) and 0.1 percent asbestos per DOSH asbestos material regulations (California Code of Regulations[CCR] Section 5208). • Paint containing more than 5,000 ppm or 0.5 percent by weight lead will be considered LBP per HUD (2012) and EPA regulations (40 CFR Part 745—Lead-Based Paint Poisoning Prevention in Certain Residential Structures). • Caulk containing PCBs at concentration equal to or exceeding 50 milligrams per kilogram (mg/kg)is considered hazardous according to EPA 40 CFR 761.62(b)(4)(ii). • The proposed SLs for arsenic,lead,TPH,and PAH in soil sample results will be the federal RSL for industrial and residential soil(EPA 2024),DTSC SLs for commercial and residential receptors (DTSC 2022),and the RWQCB Tier 1 ESLs (RWQCB 2019). • Proposed SLs for soil gas at the Site to evaluate sample results will be RWQCB Tier 1 ESLs for sub- slab soil gas (RWQCB 2019) and EPA VISLs for commercial and residential receptors (Appendix A). • Proposed SLs for indoor air at the Site to evaluate sample results will be EPA RSLs for industrial and residential air(EPA 2024),DTSC SLs for commercial and residential receptors (DTSC 2022),and RWQCB Tier 1 ESLs for indoor air(RWQCB 2019). 12