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SKIN <br /> SCOPE OF WORK <br /> J . <br /> The following paragraphs describe the proposed scope of work to complete soil remediation <br />'r activities. <br /> Task 1: Vapor Extraction System O&M Compliance Monitoring and Reporting <br /> This task includes monitoring of the vapor extraction system (VES) as required by the APCD <br /> Permit to Operate. Smith Environmental will visit the site weekly and perform the following <br /> activities: monitoring an adjustment of system parameters to optimize VES extraction, <br /> is treatment, and site cleanup efficiency; measurements of vapor extraction flow rates, <br /> temperature, induced vacuum responses and vapor concentrations with a flame ionization <br /> detector. Once a month, Smith Environmental will collect vapor influent and effluent samples <br /> from the VES. The samples will be sent using chain of custody record to a State-certified <br />{ laboratory for analysis of total petroleum hydrocarbons as gasoline (TPHg) and benzene, <br /> toluene, ethyl benzene, and xylenes (BTEX) using EPA methods 801518020. Samples will be <br /> analyzed using standard turnaround time. Smith Environmental assumes that the system will <br /> operate through fourth quarter 1995, at the longest, to collect sufficient data to satisfy <br /> f PHS/EHD and request that the system be shut down. Monitoring results will be summarized <br /> in a quarterly report and submitted to you in draft form. After receiving and incorporating any <br /> comments, Smith Environmental will submit the final report to the PHS/EHD, APCD, the <br /> Regional Water Quality Control Board (RWQCB), and Neumiller & Beardslee. <br /> In addition, during weekly visits Smith Environmental will perform routine maintenance to the <br /> VES as required. Technicians will routinely check vacuum pressure, oil level and grease in <br /> the bearings of the blower. <br /> Task 2. Ouarterly Groundwater Monitoring and_Reporting <br /> Smith Environmental will perform one event of groundwater monitoring, sampling, and <br /> reporting, as required, during fourth quarter 1995. A field technician will measure depth to <br /> water in each site well for determination of groundwater gradient. Each well will then be <br /> purged of a minimum of three casing volumes of water and a representative water sample will <br /> be collected. Physical parameters of groundwater (pH, conductivity, temperature) will be <br /> I monitored and recorded during purging of each well. Groundwater samples will be collected <br /> into appropriate containers, placed on ice,. and transported under chain-of-custody to a State <br /> certified analytical laboratory. Samples will be analyzed for the presence of BTEX using EPA <br /> method 8020, and TPHg using EPA method 8015, modified. If groundwater is,nondetect, <br /> Smith Environmental proposes discharge of purgewater to the ground surface. Disposal costs <br /> are not included in this estimate. <br /> NA15004nC0RRESMB2004GL DOC 2 <br /> 1 <br />