COMPLIANCE INFO_2024 DRAFT REVISED SITE CHARACTERIZATION WORK PLAN

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SP-4 SWT Engineering (Z:\PROJECTS\SiteLogIQ\Site Characterization Work Plan\Appendices\Appendix B - Sampling and Analysis Plan\Appendix B - Sampling and Analysis Plan_021424.docx) If the presence of asbestos is suspected samples will be tested for the following: ◼ Asbestos, EPA 600/M4-82-020 (if suspected) In the event that results of the CAM 17 Metals analysis for total metal concentrations indicate exceedance of the 10-times the California Soluble Threshold Limit Concentration (STLC) or 20- times the Federal Toxicity Characteristic Leaching Potential (TCLP) levels, additional testing (using a Waste Extraction Test with a citrate buffer [Title 22, California Code of Regulations] and a TCLP test [USEPA Test Method 1311]) for soluble content and/or leaching potential will be performed and compared with respective state and federal standards. In addition, other analyses may be necessary based on field observations and/or results of above proposed testing. Suspected hazardous materials will require analysis for reactivity (EPA Method 9030A), corrosivity (EPA Method 9045) and ignitability (EPA Method 1010). 1.6 Laboratory Quality Assurance and Quality Control Aside from following standard operating procedures and regular industry practices, no project- specific field quality control will be performed. The analytical laboratory will perform Quality Control (QC) in accordance with their in-house QC protocols. The QC will include method blank results, laboratory control spike, and matrix spike results. Method Blank Results – A method blank is a laboratory-generated sample that assesses the degree to which laboratory operations and procedures cause false-positive analytical results for a sample. The method blank results associated with the samples will be included with the analytical results. Laboratory Control Spike – A Laboratory Control Spike (LCS) is a sample that is spiked with known analyte concentrations and analyzed approximately 10 percent of the sample load in order to establish method-specific control limits. The LCS results associated with each sample will be attached on the LCS and LCS Duplicated Analysis Report. Matrix Spike Results – A matrix spike is a sample that is spiked with known analyte concentrations and analyzed at approximately 10 percent of the sample load in order to establish method-specific control limits. The matrix spike results associated with these samples will be attached on the Matrix Spike and Matrix Spike Duplicate Analysis Report. Accuracy – Accuracy will be measured by percent recovery as defined by: % recovery = (measured concentration) x 100/(actual concentration) 2. DOCUMENTING AND REPORTING 2.1 Field Notes A field logbook will be used to document the vital project and sample information. At a minimum, the following sample information will be recorded: DRAFT