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rp � <br /> r SECOR e <br /> T -1-1110E <br /> February 17, 1998 Irrtc��lrcitio»ctl I�uo���oitrt��cl u�W <br /> 12 <br /> r� <br /> David L Crow {ri , <br /> San Joaquin Valley Unified Air Pollution Control District fft <br /> 1999 Tuolumne Street, Suite 200 <br /> Fresno, CA 93721' <br /> 2 <br /> Subject Quarterly Report on Thermal Oxidizer Operation F' <br /> Fourth Quarter 1997 {'iK <br /> Permit No N-3139-1-0 �rtrtM <br /> 440 West Charter Way, Stockton, CA <br /> x� <br /> r <br /> Mr Crow F3 <br /> Enclosed for your review is the Quarterly Monitoring Report for the period October through L <br /> December 1997 for the above referenced site SECOR International Incorporated (SECOR) is <br /> forwarding you a copy of this report on behalf of Mr Dave Heinrich of Texaco Environment, <br /> Health & Safety (TEH&S) <br /> The soil remediation system consists of four dual-completion vadose zone extraction wells, a <br /> • vacuum blower, and a thermal oxidizer A SECOR technician visited the site bi-monthly to <br /> monitor the system Activities performed during these visits included equipment inspection, <br /> influent and effluent soil vapor concentration measurements, and control system adjustments <br /> A flame ionization detector (FID) was used by the technician to measure the soil vapor <br /> concentrations when the soil remediation system was operating Influent and effluent soil vapor <br /> samples were collected in Tedlar sample bags and submitted to V O C Analytical in Glendale, <br /> California for laboratory analysis <br /> During this reporting period, the soil remediation system was 65% operational Only partial <br /> operation of the system was possible this quarter due to automated equipment shut downs and a <br /> voluntary shut down during confirmation of the annual operating permit renewal Air samples <br /> were not collected from the system during November 1997 because of the reduced operating <br /> time The system was sampled in late December 1997, but the samples were not accepted by the <br /> analytical laboratory due to lack of holiday personnel On January 6, 1998, air samples were <br /> collected in an attempt to acquire representative data as a result of missing the December <br /> sampling event <br /> The remediation system efficiency results are included in the soil vapor extraction operation <br /> report (Attachment 1) Analytical results for samples collected in October 1997 are in <br /> Attachment 2 <br /> isTES/Stockton/Charter Way cov SECOR <br /> 7G003-002-01 <br /> February 17, 1998 <br /> 3050 rare C11 de Suite 204 Sao timento CA 95827 (916) -304-INNO 01 10} 364 1889 1 1\ 11 it H -01 com <br />