ARCHIVED REPORTS XR0006864 - Laserfiche WebLink

Home Browse Search

' Appendix F ' SOIL-VAPOR EXTRACTION TESTING PROCEDURES AND EQUIPMENT The purpose of performing a pilot-scale soil vapor extraction test (SVET) is ' to acquire site-specific data which is necessary for the design of a full-scale system. Specifically, the data acquired are used to identify or estimate the following parameters: the quantity of vapor extraction wells necessary to remediate an environmentally impacted area ' the magnitude of the extraction vacuum necessary to remediate an environmentally-impacted area the flow rate that will be generated by the given extraction vacuum the magnitude of the concentration of petroleum ' hydrocarbons in the soil vapor during operation of a full-scale soil vapor extraction system ' In order to assess these parameters, the objectives of the SVET procedures are to (1) determine the radius of influence, (2) measure the relationship between extraction vacuum and extraction flow rate, and (3) characterize 1 the concentration of petroleum hydrocarbons in the soil vapor. In order to experimentally quantify the radius of influence, EMCON ' Associates' field engineer uses the SVET system to extract soil vapor from an extraction point (a well or probe) and measure the resulting vacuum at several monitoring points (additional wells or monitoring probes). Typically the wells or probes used in the SVET have screened intervals in the vadose zone within the environmentally impacted region; however, ground-water extraction and monitoring wells can also be used. In order to assess the relationship between extraction vacuum and flow rate at a particular location, EMCON Associates' field engineer uses the SVET system to extract soil vapor from an extraction point at various vacuums and measures the resulting flow rate. pig F OV9010f900020.1 a 1 Rev. 0 December 15, 1992