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07 May 2015 • • <br /> AGE Project No. 15-3325 <br /> Page 4 of 4 <br /> The sample containers will then be labeled with the initial and final vacuum to ensure <br /> that the regulator was functioning properly. <br /> One ambient air sample will be collected outside of the community center building to <br /> establish background concentrations. <br /> Indoor air samples will be analyzed by a State of California Department of Public Health <br /> Services (CDPH)-certified laboratory for Volatile organic compounds (VOCs) in <br /> accordance with EPA Method TO-15. <br /> Laboratory reports for air sample analyses, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports and sample chain of custody documentation <br /> will be presented in a report with findings and recommendations. The lowest possible <br /> method detection limits will be achieved, which will allow comparison with established <br /> guidelines. Analytical data will be evaluated against the commercial Cal-EPA California <br /> Human Health Screening Levels (CHHSL) and the Central Valley Regional Water <br /> Quality Control Board Environmental Screening Levels (ESLs) in all samples collected <br /> during the investigation. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to use, all sampling tools used for sample collection will be thoroughly rinsed with <br /> clean water after being washed with a solution of Alconox. All probing rods will be <br /> cleaned prior to advancement at each probe boring location. <br /> BORING ABANDONMENT <br /> The probe borings will be permanently sealed to prevent vertical migration of potential <br /> contaminants. Each soil boring shall be backfilled to surface grade with neat cement <br /> and covered with concrete or asphalt, depending on the surrounding surface material. <br /> REPORT PREPARATION <br /> An initial report of findings will be prepared, summarizing the findings of the indoor air <br /> and soil vapor samplings. Reports will include description of work performed and the <br /> results of the sampling analysis. Conclusions and recommendations will also be <br /> included in the report, in applicable. <br /> Advanced GeoEnvironmental,Inc. <br />