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• Page 4 of 6 <br /> Cc: Larry Witwer <br /> Subject: FW: Frontier Transportation -Temporary Sewer Permit- RFI -425 Larch Road,Tracy, California 95304 <br /> Armando Salaiz <br /> Engineering Technician <br /> City of Tracy <br /> Development&Engineering Services <br /> 333 Civic Center Plaza <br /> Tracy,CA 95376 <br /> T: (209) 831-6400 <br /> Armando.Salaiz(i�ci.tracy.ca.us <br /> RE: Frontier Transportation <br /> 425 Larch Road,Tracy,California 95304 <br /> San Joaquin County Environmental Health Department Case No. 2251 <br /> UST Cleanup Fund Claim No. 12886 <br /> Temporary Sewer Permit <br /> Dear Mr. Salaiz: <br /> The subject site is an active/open leaking underground storage tank(LUST)case. We are the environmental <br /> consultant in charge of the investigation and remediation of the soil and groundwater contamination. As part of <br /> our ongoing environmental remediation process at the subject site,we would like to inquired about the <br /> feasibility/requirements of securing a"temporary sewer permit'. This permit is intended for discharging treated <br /> groundwater into the sewer system. <br /> Proposed Methodologies and Activities: <br /> Utilizing a mobile High-Vacuum Dual-Phase Extraction(HVDPE)system,we propose to remove petroleum <br /> hydrocarbons from the soil and groundwater at the subject site. These proposed activities have been approved by <br /> the San Joaquin County Dept. of Environmental Health and will be performed in order to conduct the soil vapor <br /> and HVDPE pilot test and remedial action. <br /> Once groundwater is extracted,the majority of the dissolved phase hydrocarbons in the groundwater will be <br /> volatilized via air stripping. The groundwater will be pre-filtered before entering the air stripper,utilizing bag <br /> filter(s). The vapors from the air stripper will be routed to a thermal oxidizer,where temperatures in excess of <br /> 1,400 degrees F effectively combusts the hydrocarbon laden vapor. The destruction efficiency for the oxidizer is <br /> 99%or greater. <br /> The treated groundwater will be sent though activated carbon for final polishing to removal all remaining <br /> hydrocarbons,and then discharged to the Sewer system under the suitable permit. The treated water for discharge <br /> will be sampled and tested to confirm the hydrocarbons have been removed. <br /> Accordingly,could you kindly inform us of the following: <br /> • Do you have a temporary sewer discharge permit program available? <br /> • If so,what are the requirements to secure a temporary sewer permit? <br /> • What would be the estimated permit costs? <br /> • What would be the time frame required to secure this permit? <br /> • Are there any additional conditions for securing this permit? <br /> Thank you, <br /> Yarone <br /> 10/18/2011 <br />