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SAP/QAPP Addendum Lodi-125 N Stockton Final March 24,2025 Building materials,soil,soil gas,and indoor air material AOCs for the project are listed in Site-Specific QAPP Worksheet#15 (at the end of this section) along with associated SLs.The scoping team selected those AOCs based on professional judgment as to contaminants expected to be present at the Site. Results will be evaluated according to the following criteria: • If analyses of building material,soil,soil gas,and indoor air samples indicate concentrations of AOCs exceeding SLs,EPA or the Applicant may recommend additional characterization,removal,or remediation of impacted building material, soil,soil gas,and indoor air or find that Site conditions are not suitable for the planned redevelopment. • If analyses of building material,soil,soil gas,and indoor air samples indicate concentrations of AOCs less than SLs,EPA or the Applicant may recommend further characterization or find that Site conditions are suitable for the planned redevelopment. 3.3 Measurement Quality Objectives Measurement quality objectives are criteria established to assess the viability and usability of data.These objectives are based on both field and laboratory protocols that examine whether data quality indicators (DQI) meet the established criteria for the project.The Toeroek Team developed the DQI goals for this project by following the guidelines in EPA Guidance for QAPPs (EPA 2002). To ensure representativeness of sampling results,all sampling will accord with procedures detailed in Sections 4.0 and 6.0,as well as standard operating procedures (SOPS). Site-Specific QAPP Worksheet#10 and Site-Specific QAPP Worksheet#12 (at the end of this section) document DQOs and DQIs for this project.DQIs presented in Site-Specific QAPP Worksheet#12 and the laboratory's QA/QC criteria have been reviewed by the Toeroek Team and meet project requirements.The laboratory's reporting limits are determined to be appropriate for this project by the Toeroek Team. 3.4 Data Review and Validation Because of the limited scope,limited duration,and investigative nature of this project,the data will not undergo data validation by a third party but will be reviewed by an independent Toeroek Team QA manager. See QAPP Worksheets #35 and#36 in the Final Programmatic QAPP Revision 2 (EPA R9/QA DCN: FY22BNFD227) (Toeroek Team 2022) for the data validation procedures and documentation requirements. 13