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Canepa's Car Wash <br /> September 23, 1996 <br /> Page -7- <br /> 9,0 RECOMMENDATIONS <br /> Based on the results of the SVE system evaluation and site background, Condor recommends that <br /> operation of the ICU be suspended since the system does not appear to meet APCD permit conditions (i.e., <br /> 95% destruction efficiency). Condor recommends that a 150 SCFM catalytic oxidation unit (CAT-OX) <br /> be installed at the site to extract and treat the gasoline contamination in the vadose zone. The <br /> configuration of the existing SVE wells appears to be sufficient to remove a majority of the remaining <br /> gasoline contaminants in the vadose zone. The system should have an organic vapor destruction efficiency <br /> of at least 95 % per APCD requirements. The system should be manifolded to accommodate various <br /> combinations of SVE wells at one time. The existing ICU may be appropriate for use at the site when <br /> organic vapor concentrations drop to lower levels. <br /> Quarterly groundwater monitoring should continue, including analyses for TPH-G, BTEX, and MTBE. <br /> The groundwater mounding beneath the site should be further investigated in an attempt to determine the <br /> source. The next quarterly groundwater monitoring event is scheduled for January, 1997. If you have <br /> any questions or require additional information, please call James Wack at (209) 668-9234. <br /> Respectfully submitted, Q�pQSEdoIONA�Fy� <br /> H <br /> cotib' 00 <br /> � � T <br /> 1 <br /> J es F. ac Robert 7. 7o (n _ F 'CpL`FpQ� <br /> aff Geologist California Regis <br /> Professional Engineer, Civil <br /> #51592 <br /> Canepa:\1707.Rpt <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 304 E . Weber Ave. Third Floor <br /> P. O. Box 388, Stoc CA 95201 -0388 <br /> Approved <br /> Denied ❑ <br /> k}/ Conditions 5� beg:49� <br /> Date Z l q/� by <br /> ` Jpjrin1� <br /> b;OL, c* 5V 5 `NST{� h <br /> LIQ 06-n WVXTtM iAep Lo � IV�(, 1bI` CD <br /> I N (opw6v 5alrwW rfF SVa t r Aolq� <br /> f�] "tu N aOt�kAn& 51 <br /> APO <br /> Q(1A'[UcAI/ Sl�� I �,EA <br /> g 4ut6eAVswum tb IN ?%WWkk yM MQ (WkVj CONDOR <br /> l 41, Noebw kk1we, LSSVq v P?00 <br />