ARCHIVED REPORTS_XR0010286 - Laserfiche WebLink

Home Browse Search

Working To Restore Nature 6.6.2 Systems Sampling ' 6 6.2 1 System Sampling - Vapor Extraction System ' Typical SJVUAPCD guidelines require that dunng the startup phase of the off-gas abatement unit, influent and effluent air samples to the VES be collected to evaluate destruction efficiency of the unit. To demonstrate compliance with SJVUAPCD regulations, the VES will likely be sampled at least once during the first week of operation, and once per month for the life of the ' remediation system. With the exception of influent and effluent air samples collected and analyzed as detailed above, during the first 2 days of operation and later on a biweekly and ' monthly basis, all other sampling of the VES will be conducted using a field organic vapor monitoring instrument approved by the SJVUAPCD If at any time the results of laboratory analyses or field monitoring readings show emission limits to be exceeded, a confirmation air sample will be taken immediately and analyzed on a 24-hour turnaround basis. If emission limits are shown to be exceeded, the system will be shut down and any necessary corrective action will be performed before repeating the startup sequence SJVUAPCD will be notified that ' emission limits were exceeded within 24 hours of such indication ' The off-gas treatment system will be modified to an activated carbon adsorption system when ' the hydrocarbon concentrations of extracted vapor from subsurface soil make it safe and cost- effective to do so. Typical SJVUAPCD guidelines require that, extracted vapor influent to and ' effluent from the carbon system will be monitored with a field instrument approved by the SJVUAPCD on a daily bass until the frequency of carbon changeout can be evaluated System ' monitoring frequency will likely be changed to once every 2 weeks or monthly, with a field instrument and monthly verification with bag samples upon receiving SJVUAPCD approval. 38009-8138009-8 FRP 17