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10 November 2005 AGE-NC Project No. 95-0184 Page 2 of 2 3.1. SOIL VAPOR EXTRACTION PILOT TEST For performance of an SVE pilot test,a portable internal combustion(IC)system will�be set-up on- site and operated for a period of 8 to 10 hours.The unit will be used to apply a vacuum ars)ibxttraction well, �sroposed vapor wells VW-5A and B. a / u/ The induced vacuum will be measured at multiple SVE wells and several monitoring wells t1K throughout the site. Additionally, the vapor concentrations from the extraction wellSground water depths and others SVE unit parameters (operation speed, air flow and vacuum) will be measured during the SVE pilot test. The extraction well vacuum, induced vacuum at monitoring points, extracted hydrocarbon concentrations and extraction flow rate will be measured at 30 minute intervals throughout the test.The data will aide to estimate the relative subsurface permeability for C— vapor extraction,radius of influence of the vapor extraction well and the initial hydrocarbon recovery rate.Monitoring data from observation wells and the extraction well will be collected on field logs. Data will facilitate in the design of the SVE system and will be used to determine the number of– p vapor wells, the spacing of the wells and the selection of vapor remediation system (e.g. internal combustion,thermal oxidation, catalytic oxidation). Four vapor samples will be collected from the extraction well6during the test. Samples will be collected at approximately two hour intervals.The samples will be collected in Tedlar bags,within a vacuum chamber and stored in a cool container and transported under chain-of-custody to a DHS- certified laboratory for analysis. Each vapor sample will be analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in accordance with EPA Method 8015 Modified/5030; • Volatile aromatics (benzene, toluene, ethylbenzene and xylenes: BTEX) and Fuel oxygenates; di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), MTBE, tertiary- amyl methyl ether (TAME) and tertiary butanol (TBA) in accordance with EPA Method 8260. 3.2. REPORT PREPARATION Procedures and findings of the SVE pilot test will be analyzed within a feasibility report prepared in conjunction with the additional ground water extraction pilot tests proposed for the site. Results of feasibility studies may also be detailed in a Corrects ev Action Plan(CAP).The CAP will provide an analysis of feasibility testing and include recommendations for soil and ground water remediation at the site. The reports will be in a format acceptable to the EHD and will be reviewed and signed by a California Professional Geologist. Advanced GeoEnvironmencal,Inc.