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02/ 04/ 2000 14 : 24 2094671118 AGE STOCKTON PAGE 02/ 02 <br /> Advanced <br /> GeoEnvironmental , Inc . U=- <br /> 04 February 2000 <br /> AGE-NC Project No, 95-0121 <br /> Mr, Mike Infurna <br /> San Joaquin County Public health Services Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 DD <br /> TA <br /> Subject: Modification to Proposed Soil Vapor Extraction system At AAy # <br /> Nomellint Construction Co. - 1045 West Charter Way, Stocktou, California <br /> Dear Mr. Infurria: <br /> A general trend of increasing ground water elevations has been observed at 1045 West Charter Way (site), <br /> Stockton, California since February 1991 . As a result, the bulk of petroleum-impacted soil at the site has <br /> submerged below the ground water table. To aggressively remediate the site, it appears the best alternative <br /> is to initiate an in-situ air sparging (IAS) system in conjunction with a soil vapor extraction (SVE) recovery <br /> system. The air sparging system will mechanically strip petroleum contaminants from the dissolved and <br /> adsorbed phases that are presently submerged below the ground water table; the stripped petroleum- <br /> hydrocarbon contaminants will be vented into the vadose zone and recovered as vapor by the SVE recovery <br /> system. <br /> Advanced GeoEnvironmental, Inc. (AGE) proposes to begin extracting hydrocarbons utilizing an active <br /> vacuum blower and two carbon canisters (55 -gallons each); this modification of the remediation system will <br /> allow for the recovery and destruction of hydrocarbon vapors within the existing vadose zone at a much <br /> lower energy cost than that of a thermal oxidizer. Progress and operation of the vacuum blower and two <br /> carbon canisters will be evaluated in quarterly reports. <br /> If you have any questions or require further information, please contact our office at (209) 467- 1006. <br /> Sincerely, Bary J13A. WUN I I( <br /> Advanced GeoEnvironmeutal, Inc. ENVIRONMENTAL NEALYH DIYtSON <br /> 304 E. Weber Ave. Third Floor <br /> g� P.O. Box 3881 Stoddon, CA- 95201 -0388 <br /> - �amt� Phone: (209) 468-3420 <br /> Timothy ue r <br /> Project Geologist Approved <br /> Approve with Changes: See Remarks <br /> Enclosures U Disapproved : See Remarks <br /> cc: Mr. Dante Nomellini - Nomellim Construction Co. Rt rkL <br /> 4005 North Wilson Way, Stockton , C11196fhiavN^ �+ d ..�.. By`yu . <br /> Telephone (209 ) 467- 1005 FAX (209) 467- IIIA <br /> Approval of these plans extends only to that <br /> which is shown and descril,ed hereon but <br /> does not authorize or 1> ,;.ro re any o.b )i+ .!on <br /> or deviation of requirements of Mate laws or <br /> Local Ordinances. _.__- <br />