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I <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heron, REHS <br /> 1868 East Hazelton Avenue <br /> N: < Stockton , California 95205-6232 PROGRAM COORDINATORS <br /> ' ` Robert McClellon, REHS <br /> - Jeff Carruesco, REHS, RDI <br /> Cq'� . . ... . ��P Website: www.sfgov.org/ehd Kasey Foley, REHS <br /> FOR Phone: (209) 468-3420 Linda Turkatte, REHS <br /> i <br /> Fax: (209) 464-0138 <br /> I <br /> April 11 , 2013 <br /> David Guardino and Pat Guardino <br /> Guardino and Crawford Construction <br /> 517 West Fremont Street <br /> Subject: Guardino and Crawford <br /> 517 West Fremont Street <br /> Stockton, California 95201 <br /> By email dated 02 April 2013, your consulting firm , Advanced Geo Environmental , Inc. (AGE), <br /> informed the San Joaquin County Environmental Health Department (EHD) that to install the <br /> electrical system to operate the catalytic/thermal oxidizer associated with operating the soil <br /> vapor extraction (SVE) and in-situ air sparge (IAS) systems at the above-referenced site <br /> would cost $18,648 . AGE proposed replacing the catalytic/thermal oxidizer with a carbon- <br /> based SVE unit to operate the SVE/IAS systems, having determined that a carbon-based SVE <br /> remediation system "would be more economically feasible for mitigating impacted soil and <br /> groundwater at the site." <br /> The EHD approves the replacement of the catalytic/thermal oxidizer with a carbon-based SVE <br /> system using a vacuum blower capable of 250 cubic feet per minute, a condensation <br /> separator, and three 1 , 000-pound vapor carbon vessels for destroying petroleum hydrocarbon <br /> contaminants in soil and groundwater as a result of unauthorized releases from the <br /> underground storage tank formerly located at this site. <br /> Please contact Vicki McCartney at (209) 468-9852 or by email at vmccartney@sjcehd. com if <br /> you have any questions. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson , Jr. , PG <br /> Senior Registered Environmental Healt Specialist Engineering Geologist <br /> c: Mr. Brian Millman , PG , Advanced GeoEnvironmental, Inc. , 837 Shaw Road, Stockton , <br /> California 95215 <br /> Mr. James L. L. Barton , PG , California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />