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lw ec0100 and ellAraIment,inc. 4. Analytical Data mg/L, which is above the site specific action level established for this assessment of 0.0005 mg/L. Styrene was detected at boring location EC2-02 at a concentration of 0.00028 mg/L, which is below the site-specific action level established for this assessment of 0.01 mg/L. Acetone was detected at boring location EC2-10 at a concentration of 0.014 mg/L, which is below the site- specific action level established for this assessment of 1.5 mg/L. Carbon Disulfide was detected at boring location EC2-02 at a concentration of 0.00022 mg/L. There is no listed regulatory level for Carbon Disulfide. No other VOCs were detected above the laboratory reporting limits. Laboratory analytical results for VOCs analyses are presented in Table 5 in Appendix C. The complete laboratory analysis data reports for all samples are contained in Appendix D. 4.4 Summary and Discussion of Quality Assurance/Quality Control Data Soil samples were analyzed for metals by CLP ILM05.4 by Sentinel, Inc. in Huntsville, Alabama. Soil and groundwater samples were analyzed for VOCs by CLP SOM01.2 by ALS Laboratory Group in Salt Lake City, Utah and for TPH by EPA Method 8015 by the U.S. EPA Region 9 Laboratory in Richmond, California. Data from the U.S. EPA CLP laboratories are Tier 1B validated by the U.S. EPA with associated quality assurance reviewed by START. The data were qualified by the respective laboratories or by the START data validator where necessary. The Tier 1B data validation conducted by the CLP laboratories included evaluation of criteria such as laboratory quality assurance/quality control summaries, holding times, method blank contamination, and matrix-related recoveries. The START review of the Tier 1B data validation results compared data to specific project quality objectives, which included target analytes, sensitivity, analytical accuracy, analytical and sampling precision, and analytical completeness. The START quality control (QC) review also evaluated trip and equipment rinse blank contamination and comparison of primary sample to field duplicate results. No QC issues were identified by START during the Tier IA data validation review. Based on the results of the Tier I and Tier 1B data validation, the analytical data for this TBA were deemed acceptable for use in this report without qualifications, as noted in the analytical data tables. 4-4