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A total of two groundwater samples were collected and submitted for laboratory analyses. The groundwater grab samples were labeled, packaged, and stored in an insulated chest for transport under chain-of-custody manifest to the analytical laboratory. 2.3 Laboratory Analysis The soil samples collected and retained for analysis were submitted to Sparger Technology, Inc. (Sparger), of Sacramento, California, a California-certified analytical laboratory. Chain of custody procedures, including the use of chain of custody forms, were used to document sample handling and transport from the time of collection to delivery to the laboratory for analysis. The chain of custody forms and laboratory analytical reports are included in Appendix D. 2.3.1 Aerially Deposited Lead Investigation Soil samples from the upper 0.6 meters (2 feet) of each boring were included in the aerially deposited lead investigation. These samples were analyzed for total lead in general accordance with EPA Method 6010. Based on the results for total lead analyses, specific soil samples were further analyzed for the soluble concentration of lead in the samples. Soil samples reported to contain lead at concentrations that exceeded 50 mg/kg were analyzed for soluble lead concentrations using the Waste Extraction Test(WET). Soil samples with soluble lead results that exceeded the Soluble Threshold Limit Concentration (STLC) of 5 milligrams per liter(mg/1) were analyzed by the WET using a deionized water extraction solution(DI WET). Soluble lead analyses by the WET were conducted on 35 soil samples. DI WET analyses were conducted on 12 soil samples. Sixteen soil samples were tested for pH. Analytical results reported for the soil samples analyzed are presented on Table 1. 2.3.2 UST Investigation The soil samples from collected from greater than 0.6 meters (2 feet),beginning with the samples collected from 1.2 meters (4 feet), and the groundwater grab samples were included in the UST investigation. These samples were analyzed for the following: Matrix Analyses Soil/water Total Petroleum Hydrocarbons as Gasoline(TPHg)Modified EPA Method 8015 Soil/water Total Petroleum Hydrocarbons as Diesel(TPHd)Modified EPA Method 8015 Soil/water Total Petroleum Hydrocarbons as Motor Oil(TPHmo)Modified EPA Method 8015 Soil/Water Benzene/Toluene/Ethylbenzene/Xylenes(BTEX)EPA Method 8020 Soil/water Organolead LUFT Field Manual(May 1988)Protocols SacDP-N:IrancjpllProjecrsl8?I8?l?641Reponll2O Aurin repon.doc 2-4 S/?1101