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1 •' t - i - - <br /> .30 September 2005'.' <br /> i <br /> AGE NC Project No. 97-0343 _ = r' <br /> Page.3 of 6 <br /> 2.4. PROPOSED INTERIM SOIL REMEDIATION SYSTEM <br /> _ - The proposed interim rerried_iation SVE system will consist of'a vapor/liquid separator,"15 0 standard _ - <br /> t. cubic feet per minute CFM vacuum blower and a three l 000-1b anular activated caibons vessels.: <br /> P (CFM) _ . <br /> The two=inch diameter piping installed underground from the well-head.at wells VW-1, VW2, <br /> r VW-3,`1VIW-1, MW-2 and MW-3 will bei°connected to the inlet of tlre=vacuurri blower; the outlet <br /> from the vacuum blower will be routed through N" n uced vacuurri;will measured, <br /> -utilizing a Magnehelic vacuum- auge attached o the inlet of the blower; SVE air flow will-be - <br /> monitored using a:Dwyer DS-200 flow sensor. .Sampling ports.-will be installed upstream.of the - <br /> = vacuum blower:inlet to recover SVE influent airflow vapor stream samples;`and'downstream-of the <br /> carbon&vessels`too ecover •effliient SVE air 116w samples.-.and to monitor th0.- fficiency of- <br /> . r. <br /> hydrocarbon destruction.A schematic-diagram ofthe.SVE treatment system.is.depicted'in Figure.4. ' <br /> 2.5. INTERIM.REMEDIATION START UP'PERIOD <br /> During'the SVE' scarf-up period .(first week of operation); influent and effluent air=flow`vapor. <br /> A =- samples will be collected ori a daily basis and•submitted for laboratory analysis of TPH=g,BTEX-and s ' <br /> ` MTBE to monitor hydrocarbon destruction eff ciency;during this time,SVE-operational parariieters <br /> ,•'' <br /> -including soil-gasvapor concentrations,_air flow, vacuum and temperature'will be -a <br />_ daily.basis to gauge the optimal.recovery rate of recovered.hydrocarbon vapors.Following.th6 SVE- <br /> start-up period;air-flow vapoi'sampleswill be-collec'ted on a riionibly basis'and the'SVE operational <br /> parameters will'be monit&&on,a weekly basis to 7moniior,cleanup progress:~ <br /> -2.6. -MONITORING AND MAINTENANCE � 'ry ,• - <br /> - <br />-. Following the initial `startup'period,influent and effluent air=flow vapor"samples will be collected;' <br /> on a monthly basis and submitted to a State of California Department of Health'Servicesr('DHS) T r <br /> certified laboratory for analysis:of the following constituents: <br /> • Total petroleum hydrocarbons _quantified -as. gasoline,anddiesel (TPH g, TPH-d �rn <br /> accordance wi#h EPA:Method SO15 Modified; '' } F <br /> r. -. r i <br /> Benzene;toluene,ethyibenzene,and total xylenes(BTEX)and the fuel additives di-Isopropyl r <br />-. ether(DIPS),ethyl tertiary butyl ether(ETBE),methyLtertiary-butyl ether(MTBE),tertiary.. <br /> L amyl methyl ether(TAME) tert'iary.butyl alcohol(TBA};'1;2-dichlor6ethane(1,2-DCA)_and. <br /> 1;2-dibromoethane (EDB) by EPA_Method 8260B - 3 <br /> t � F rAdvanted GeoEnvironmental,Inc { <br /> - <br />