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08 February 2012 <br /> AGE-NC Project No. 95-0106 <br /> Page 4 of 4 <br /> For ambient air samples, Summa canisters will be placed approximately 10-15 feet from <br /> the residence and 2-3 feet above the ground surface. The Summa canister will then be <br /> opened to begin air sample collection. <br /> Proposed air sampling locations are depicted in Figure 2. n <br /> t <br /> Air samples will be analyzed by a State of California Department of Public Health (CDPH)- <br /> certified laboratory for the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with <br /> EPA Method TO-3; <br /> • BTEX and volatile organic compounds(VOCs)including all oxygenated compounds <br /> in 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. <br /> 2.4. REPORT PREPARATION <br /> Following the completion of the proposed scope of work, a report will be prepared <br /> presenting the findings and documenting the installation of the vapor intrusion mitigation <br /> system. The report will include a description of work performed and the results of the air <br /> sampling and analysis. Conclusions and recommendations will also be included in the <br /> report, if applicable. The report will be in a format acceptable to the CVRWQCB guidelines, <br /> and will be reviewed and signed by a California Professional Geologist. <br /> Advanced CeoEnvironmental,Inc. <br />