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TABLE I <br /> PROPOSED SOIL AND GROUND WATER CORRECTIVE ACTION ALTERNATIVES <br /> FORMER STOCKTON PLATING FACILITY 632 South'El Dorado Street, Stockton, California <br /> .................... . ................ <br /> .......... ............ ........ <br /> . .......... <br /> .................. . .. ....... <br /> Ty <br /> ':'j, <br /> �Dni or-In <br /> ... ................. .... . <br /> .9 <br /> V yantagb&7 oni ort <br /> rrms�immi <br /> Ad ...... <br /> kqjg <br /> -c strmA: 6 1: <br /> D'I 7' 1 1 ]iX­ <br /> R Ir <br /> ........ . .......... <br /> ................. ...................... dm-aEu <br /> ...... <br /> In-situ Soil Vapor • Easily combined with other Greater than 90%reduction of S 40,000 to 565.,000 Weekly and Monthly 36 to 60 <br /> Extraction methods(i.e. TAS)- Readily contaminants generally not annually. vapor sampling; semi- months <br /> available equipment- attainable-Large initial annual or annual soil (SVE Must be <br /> Conducive site conditions• equipment cost- Supplemental sampling. conducted in <br /> Relatively rapid cleanup period ENERGY required and costs conjunction <br /> (18 to 24 months) - Can cleanup can be excessive- Air with 1AS) <br /> contaminated soil under permitting required-Only <br /> structures. non-saturated soils cleaned <br /> up. <br /> In-situ Air Sparging •Cleanup technique compatible •Initial equipment/design $25,000 to$30,000 Monthly ground water 36 to 60 <br /> with site conditions-Combines costs can be costly- Site plus extraction depth measurements; months <br /> well with SVE- Readily conditions are conducive for monitoring, monthly sample (based on <br /> available equipment, Little IAS treatment-Due to high depending upon collection. comparable <br /> equipment maintenance saturated contaminate mass, treatment period. site analysis <br /> required. this method unable to achieve and IAS <br /> cleanup goals in the general performance) <br /> vicinity - Mass migration. <br /> lit-situ Soil Vapor •Easily combined with other Greater than 90%reduction of S 40,000 to$65,000 Weekly and monthly 12 to 18 <br /> Extraction methods(i.e, IAS)-Readily contaminants generally not annually. vapor sampling, semi- months <br /> available equipment- attainable- Supplemental annual or annual soil <br /> Conducive site conditions- ENERGY required and costs sampling. <br /> Relatively rapid cleanup period can be excessive- Air <br /> • Can cleanup contaminated soil permitting required- Only <br /> under structures. Equipment non-saturated soils-cleaned <br /> cost: later less expensive up. <br /> equipment can be utilized. <br /> Ground Water •Rapid reduction in high • High volumes of extracted 555,000 to 565,000 Quarterly or monthly May vary-, <br /> extraction: Pump concentrations- Prevent water wit I require disposal- annually. monitoring-, monthly typically 1.8 to <br /> and Treat spreading of MTBE plume- Typically unable to quickly analysis of extracted 36 months. <br /> Prevent spreading of BTEX achieve cleanup goals- water. <br /> plume- Reduction in saturated Usually not cost effective for <br /> adsorbed contaminate mass, larger plunics- <br /> Equipment can be costly. <br />