WORK PLANS - Laserfiche WebLink

Home Browse Search

All manifolding, electrical, and plumbing will be performed in accordance with any and all City of Lodi and/or San Joaquin County building ordinances and codes.The electrical service requirements for the SVE Pilot Test system will be supplied via a power drop at the treatment system areas. Service requirements are expected to be single-phase 240 volts at 100 amps. 7.3.3 SVE Pilot Test Procedures Well testing will be conducted at the eight test sites over a period of approximately forty five (45) days. Initial groundwater VOC data will be collected from all of the wells prior to startup. During the startup test, a vacuum pressure gauge will be installed at each of the SVE wells to measure the vacuum at each location. The vacuum pressure gauge to be employed will be capable of detecting pressure changes of 0.1 inch of water. Vacuum will be recorded from each inlet well and will be plotted against distance. The distance-vacuum curves generated will yield the empirical data necessary to estimate whether the well configuration will provide sufficient lateral coverage to capture vadose zone VOC vapors. Baseline Monitoring Baseline monitoring will be initiated one day before the active SVE well test begins to characterize the static conditions. Baseline monitoring will consist of groundwater level measurements at the monitoring well and initial soil vapor sample analyses at the extraction and observation wells.Vapor samples will be obtained to measure oxygen, carbon dioxide, and VOC concentrations in the SVE wells.A vacuum pump will be used to purge three well casing volumes of air prior to sampling.The field screening samples will be collected in a 1-liter Summa canister. Samples will be field checked for 02 and CO2 using a Gas Tech LEL meter and will be laboratory analyzed for VOCs using USEPA Test Method TO-15 and fixed gases using USEPA Test Method 8260B. Onsite groundwater monitoring well LNC-MW I will be used for water level monitoring to evaluate diurnal trends in groundwater elevation. A pressure transducer will be installed in the well and connected to a data logger that will record water level measurements continuously for a 24-hour period prior to beginning vapor extraction testing. This data will be downloaded to a spreadsheet Main\D:AEnvironmental\LN CV\10152007.wpd 53