Laserfiche WebLink
A I¢ <br /> EDMUNC G BROWN JR. <br /> MAY 17 2013 DOVERNOF <br /> , I.oRNI. M <br /> SE RE ARI ORDRIOUEZ <br /> Water Boards -N\&)iVMENTALFIEALTt� FNVIRnNMFNTPI PRnTF IIDN <br /> PERty MT 21S `�`0-8 <br /> Central Valley Regional Water Quality Control Board <br /> Ben Terry 15 May 2013 <br /> Chevron Environmental Management <br /> 6111 Bollinger Canyon Road, Rm. 3652 <br /> San Ramon, CA 94583 <br /> DOCUMENT REVIEW FOR COMMINGLED PLUME ACCOUNT CP0057 SITES AT <br /> 440 (TEXACO— SHELL, RB #390268) /441 (ARCO, RB #390657) /508 (CHEVRON, <br /> RB #390876) W. CHARTER WAY AND 1444 S. LINCOLN STREET, <br /> (COLUMBO/TOSCANA BAKERY, RB #390825) STOCKTON, <br /> SAN JOAQUIN COUNTY <br /> I reviewed the Monthly Status Report—April 2013 (Report), received 14 May 2013 from <br /> Stantec, the lead consultant for the above sites. The Report documented the <br /> continuous operations of the full scale Soil Vapor Extraction (SVE) system and the <br /> startup of the Air Sparging (AS) system from 7 March 2013 through 26 April 2013 at the <br /> Chevron facility. Six (6) SVE wells (VE-1 through VE-6) and twelve (12) AS wells (AS-1 <br /> through AS-12) are piped to the SVE/AS treatment system compound/module. <br /> The Report states SVE operated 547 hours during April 2013, removed 898.17 lbs. of <br /> petroleum hydrocarbons from soil at an average rate of 39.43 lbs. per day, and SVE air <br /> emissions at 99% destruction efficiency were in compliance with the permit <br /> requirements. Initial startup for AS on 7 March 2013 revealed AS-11 and AS-12 air flow <br /> rates were minimal, indicating partial well blockage. AS-11 and AS-12 were <br /> redeveloped by hand bailing on 5 April 2013 and silt was reported in the purge water. <br /> The AS system was restarted 9 April 2013, pulse rates for the AS wells were optimized, <br /> and all AS wells were operating as designed in pulse mode on 26 April 2013. The <br /> Report recommends continuous operations of the SVE/AS treatment system. <br /> I concur to the recommendation for continuous operations of the SVE/AS treatment <br /> system. The next SVE/AS system startup monthly status report is due 15 June 2013. <br /> If you have any questions, you can contact me at (916) 464-4615 or I can be reached <br /> by e-mail at ibarton waterboards.ca.gov. <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> CC' See CP0057 Distribution List <br /> KARL E. L.ONGLEY SCD, P.E., CHAIR I PAMELA C. CREEDON P.E.. BCEE, EXECUTIVE OFFICER <br /> 11020 Sur Center Dnve#200,Rancno Cordova,CA 95570 1 wwv�waterooards ca.gov/centralvalley <br /> `*j n CVCL r.'C <br />