Laserfiche WebLink
CVWAT <br /> A S S O C I A T E S I N C . <br /> Thermal oxidation is a proven technology and destruction efficiency is not anticipated to be a <br /> ' concern. Typical SJVAPCD guidelines require that, extracted vapor influent to and effluent from <br /> the thermal oxidation system will be monitored with a field instrument approved by the SJVAPCD <br /> on a bi-weekly basis with a field instrument and monthly verification with by analytical laboratory <br /> ' testing. <br /> 6.4 Systems Performance Evaluation <br /> ' Following continued operation of the VES and air sparge system, a systems performance evaluation <br /> will be conducted to monitor the effectiveness of the remediation systems, and a report will be <br /> I issued on a quarterly basis. This report may include the following: hours of operation; system <br /> influent and effluent field monitoring readings; laboratory results of influent and effluent air <br /> samples; total and individual vapor extraction well flow rates; total and individual air sparge well <br /> ' injection flow rates; induced vacuum responses recorded in observation wells; all other relevant <br /> field data collected; and results obtained such as observed radius of influence, system destruction <br /> efficiency, etc. <br /> Recommendations will be provided to further optimize system performance and to further enhance <br /> remediation of impacted soil and groundwater if warranted. Recommendations may include tie-in <br /> of additional vapor extraction or air sparge wells to the remediation system, upgrading of the ofd <br /> gas abatement unit,etc. <br /> ' 7.0 LIMITATIONS <br /> ' This report was prepared in accordance with generally accepted standards of environmental <br /> geological and engineering practice in California at the time this investigation was performed. This <br /> assessment was conducted solely for the purpose of evaluating environmental conditions of the soil <br /> and groundwater with respect to gasoline related hydrocarbons at the site. No soil engineering or <br /> geotechnical references are implied or should be inferred. Evaluation of the geologic conditions at <br /> the site for the purpose of this assessment is made from a limited number of observation points. <br /> 1 Subsurface conditions may vary away from the data points available. Additional work, including <br /> further subsurface investigation, can reduce the inherent uncertainties associated with this type of <br /> assessment. <br /> ' s:\environmental\25291\reports\irp.do 10 <br />