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�s <br /> A <br /> AIN <br /> a <br /> z Er <br /> NE <br /> N <br /> "110 N <br /> Ad endum ro qtr. art"a�rl &ACo MENTO <br /> November 19, 1990 <br /> Page 5 <br /> emplaced around the screened intervals above which will be a two- <br /> feet bentonite seal. The annular space will be cemented to the <br /> surface with Portland Type I-II cement with a 5$ bentonite <br /> mixture. The casing will <br /> enclosed in a extend above the surface and be <br /> concretelocking monument box which will be seated in <br /> , A copy of the well permit application is included as <br /> Attachment 12. <br /> 99 Ventin-q Equi reent <br /> Soil vapor will be extracted using a Carbtrol SVX Soil <br /> Venting System (SVX) . The SVX consists of a dehumidifier and <br /> blower with vacuum, temperature, pressure, and <br /> capabilities, plus in line samplin vapor flow monitoring <br /> rated capacity of 105 cubic feet g p Ports. The SVX has a <br /> se mercury. Versar has successfully employedcthisasystemlatheS <br /> several sites and has found it to be extrPmel <br /> 6 (Attachment I) shows a soil Vapory reliable. Figure <br /> extraction flow diagram. <br /> Air Emissio Controls <br /> -� The expected duration of the pilot <br /> program <br /> 120 days.. Therefore the system will needto meetsthePairlmately <br /> emission requirements of the San Joaquin <br /> District (APCD) . According to Mr, Jrge DeGusmanutAssistaritol <br /> Engineer, APCD, the district follewa the guideline of the South <br /> Coast Air Quality Management District. The actual permit <br /> procedure and requirements are as follows: <br /> 1) A permit application must be submitted with a $50.00 <br /> filing fee. The actual cost will be $50.00 or $50.00 per <br /> hour whichever is greater. <br /> 2) The emission controls must be able to reduce pretreatment <br /> levels of TPH by 901 or more. <br /> 3) The method used to control emissions must follow the best <br /> available control technology (BACT) . The use of either <br /> activated carbon or catalytic oxidation to control <br /> emissions will meet this requirement. <br /> Activated carbon absorption bonds hydrocarbon contaminants <br /> directly onto receptor sites on the carbon and thereby removing <br /> them from the vapor stream. This method <br /> low emission rates on the order of is most economical for <br /> loo grams per day of. <br /> contaminants. <br />