Laserfiche WebLink
t <br /> ENVIRONMENTAL AUDIT, INC. <br /> 1440-A ORTEGA WAY PLACENTIA, CA 92870-7162 <br /> 7141632-8521 FAX 7141632-6754 <br /> September 30, 2003 <br />' EAI Project No 1232 <br />' Mr James L Barton <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3003 <br />' SUBJECT: UPDATED SITE CONCEPTUAL MODEL AND <br /> THIRD QUARTER 2003 <br />' MONITORING AND REMEDIATION REPORT <br /> 5400 and 5606 Pacific Avenue, Stockton, California <br /> Cleanup and Abatement Order No. 5-00-707 <br /> Dear Mr Barton <br /> Enclosed herewith for your review is a copy of the Environmental Audit, Inc (EAI) report for <br /> the above-referenced matter entitled "Updated Site Conceptual Model and Third Quarter 2003 <br /> Monitoring and Remediation Report, 5400 and 5606 Pacific Avenue, Stockton, California," <br /> dated September 30, 2003 <br /> EAI is in receipt of your letter dated September 12, 2003 Please be informed that pulsing of the <br /> air sparge and thermal oxidizer system and the sparging of the deeper zones was discussed with <br /> Mary Hartzell and was only implemented after his concurrence had been granted <br />' Pursuant to item number one (1) in your letter, EAI obtained field readings from individual wells <br /> and obtained soil vapor samples in September 2003 Please not that this report documents that <br /> very low concentrations and volumes of hydrocarbons are currently being removed through use <br />' of the thermal oxidizer These data indicate it is no longer practical or economic to operate the <br /> thermal oxidizer Therefore, EAI requests permission to terminate use of the thermal oxidizer <br /> Please note Nick Nickerson is no longer with Unocal All future correspondence should be <br /> directed to <br /> Mr Bob Hopkins Office Phone (805) 547-5468 <br /> Union Oil Company of California Fax (805) 547-5444 <br /> 276 Tank Farm Road <br /> P O Box 1069 <br /> San Luis Obispo, California 93406 <br /> PLANNING, ENVIRONMENTAL ANALYSES AND <br /> HAZARDOUS SUBSTANCES MANAGEMENT AND REMEDIATION <br />