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1 SAP/QAPP Addendum <br /> O Lodi-125 N Stockton <br /> Final <br /> March 24,2025 <br /> SITE—SPECIFIC QAPP WORKSHEET #15 <br /> PROJECT SCREENING LEVELS AND LABORATORY—SPECIFIC DETECTION/QUANTITATION LIMITS <br /> VOCs in Indoor Air <br /> Project Screening Levels µ /m3)a Laboratory <br /> Analyte CAS DTSC SLe EPA RSD RWQCB Tier 1 ESL Reporting <br /> Number Commercial Residential Limit <br /> Commercial Air Residential Air (Indoor Air)f <br /> Air Air (µg/m3)c,i <br /> [Vinyl Chloride 75-01-4 0.16 0.0095 2.8 0.17 0.0095 0.038 <br /> Notes: <br /> a Project SLs provide potentially applicable limits.All project SLs will not necessarily be used for the site screening(see DQO Step 5 for screening levels).Additional project SLs are provided <br /> to enable comparison of laboratory limits to alternative screening values <br /> b HUD.2012.Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing.Second Edition.July <br /> Laboratory reporting limits are laboratory-specific.The primary laboratory for each analytical service is provided in QAPP Worksheet#30 in the Final Programmatic QAPP Revision 2(EPA <br /> R9/QA DCN:FY22BNFD227)(Toeroek Team 2022). <br /> d DOSH values for asbestos are available at Occupational Safety and Health Administration Title 29 Code of Federal Regulations 1910.1001(b)and California Code of Regulations Section 5208. <br /> DTSC SLs from May 2022 are available at https://dtsc.ca.gov/wp-content/uploads/sites/31/2022/02/HHRA-Note-3 june2O2O-Revised-May2O22A.pdf. <br /> e Tier 1 ESLs are from RWQCB Version 2(RWQCB 2019)and not available online;they can be requested from esls@waterboards.ca.gov.If a cancer endpoint final value exists,it was used; <br /> otherwise,the non-cancer endpoint final value was used. <br /> B EPA RSLs with a THQ of 1.0 and a TR of 1E.06 from November 2024 are available at https://www.epa.gov/risk/regional-screening-levels-rsls-generic-tables.Notes(continued): <br /> h EPA VISLs from January 2025 EPA VISL calculator with a THQ of 1.0 and a target risk of 1 x 10-6;inputs and outputs are provided in Appendix A. <br /> i The lowest project SL was identified as the selected project SL.If no potential project SL was available for the analyte,the Laboratory Reporting Limit was used. <br /> µ9/m3 Microgram per cubic meter QAPP Quality assurance project plan <br /> CAS Chemical Abstracts Service RSL Regional screening level <br /> CFR Code of Federal Regulations RWQCB San Francisco Bay Regional Water Quality Control Board <br /> DCN Document control number SL Screening level <br /> DOSH California Division of Occupational Safety and Health THQ Target hazard quotient <br /> DQO Data quality objective Toeroek Team Toeroek Associates,Inc.and Tetra Tech,Inc. <br /> DTSC California Department of Toxic Substances Control TPH Total petroleum hydrocarbons <br /> EPA U.S.Environmental Protection Agency TPH-d Total petroleum hydrocarbons-diesel range <br /> ESL Environmental screening level TPH-g Total petroleum hydrocarbons-gasoline range <br /> HUD U.S.Department of Housing and Urban Development TPH-mo Total petroleum hydrocarbons-motor oil range <br /> mg/kg Milligram per kilogram TR Target cancer risk <br /> NC No criterion VISL Vapor intrusion screening level <br /> PAH Polycyclic aromatic hydrocarbon VOC Volatile organic compound <br /> PCB Polychlorinated biphenyl <br /> 38 <br />