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� a <br /> IS <br /> Chevron J.S.A. <br /> . Page 15 <br /> 5.3 Soil Aeration <br /> �. Aeration of stockpiled soil was started on March 20, <br /> 1990. As permitted by the San Joaquin ',ounty air Pollution <br /> control_ District, less than 540 cubic yards of soil was <br /> aerated on any one day. Composite sampling and analysis of <br /> stockpiled soil was used by the district to determine the <br /> maximum allowable yardage to be aerated. Results of <br /> composite sampling is presented in Table _!V. <br /> „+ TABLE IV <br /> Concentrations of Petroleum_Constituents in Sail, <br /> (Concentrations measured in parts ?er million) <br /> Sample <br /> I.D. Benzene Toluene Ethbnz. Xylenes T.P.H. <br /> r _ Cl-A,B,C n/d 0.007 n/d 0.006 1.1 <br /> r.. C2-A,B, <0.025 0.027 0 031 0.093 150 <br /> • <br /> C3-A,B,C n/d 0,011 0.012 0.054 29 <br /> Legend., <br /> < - Less than <br /> EthhnZ - Ethylbenzene <br /> T.F.H. - Total Petroleum Hydrocarbons <br /> n/d - Non-detected <br /> ' The soil is aerated by loosely spreading a lift about 1 <br /> 1 , foot thick over plastic. The lift is exposed to air and <br /> sunlight and left in place as needed to achieve "none- <br /> detected" readings with an Hnu meter. To date, five lifts <br /> hav: been pXaced- "Noxi=detected"-lifts are picked -up and- <br /> V. <br /> 16000-250-044 <br /> Corrected. <br /> DANIFS i4ic�oitt <br />