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' 6W.12 R Mh NO WEI r f- i.q To provide capacity for extracted soil vapor and for off gas from the air stripper(sea Section 3,5), a 20 kw catalytic oxidation unit,capable of treating vapor at a rate of 300 cfm(200 cfm from the soil vapor extraction system and 100'cfm from the air stripper), is specified. The unit can operate with either 3 phase or i-phase electrical input:three phase is recommended for reduced amperage. Influent and effluent hydrocarbon vapor concentrations, themee acute lower will explosive lbe measu elimit as LEL) for gasoline of the vapor, process temperature, and effluent t p required for compliance and to ensure reliable operation f the sYsteM t Control LEL remote ranges smswA automatically shut down the system if the unit deviates from optimum temperature or 95ammeters from remote monitoring system will also be installed to allow access to the systems operating p Groundwater rechnology s West Sacramento office. . .. , ... oxisia�ian"�nifs p�ovtr]a pgit"ofsum hYcfroc�rfJort destruction rtes to excess a#sD� :The ernisst�n, rates tor,tt►e Manteca site wilt be less titan 23 Ibsld�Y 01 i PH.-,.4c cording to +iso sment ... presce�uras used_by.Ehe San,JaaqumVCounty-Air pollution Control District,this mass emission"rate is well within safe levels. After the first few months of operating the extraction and treatment systems,the influent gas concentrations will decrease and the resultant effluent gas stream from the oxidizer will also decrease, it are included in Appendix Ii. Drawings of the catalytic oxidation un As the hydrocarbon concentration of the proce 'ss lltbe educed from the ses over lSan Joaquin vCo nity`A r control devices wilt be evaluated. A separate permit q em to ensure the alternative device is protective pollution Control District for changes in the treatment syst of public health. 1 3.3.3.2 Blower Selection To treat the area of adsorbed and separate-phase petroleum hydrocarbons(Figure E),MW-2 and MW-3 will initially serve as the vapor extraction wells. An 120 toot radius of influence around MW-2 is required to effectively vent the hydrocarbon impacted soil,and an 80 foot radius of influence is required if both MW-3 and MW-2 are used. As measured during the pilot tests,a flow rate of 130cfm fm a um well will provide the necessary radiueach s of influe-ice, This coverage can be provided by applying 9 a to both wells simultaneously,or by periodically changing from one well to the other. The catalytic oxidation emission control system may require dilution of the extracted soil vapor to o cfm will be tower Capacity Of 0 maintain the LEI.of the vapor stream at less than to treatment camp and are expected to be less than Pressure drops along the pipe run from well heads iably. To achieve this flow rate,two 1.5 horsepower four inches of water,and will not reduce flow apprec regenerative blowers in parallel are required. Drawings of the blower are included in Appendix If. E4.CRQt1ND14'ATFR 'FECH\OLOGY INC.