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E
<br /> TABLE 7
<br /> COMPARISON OF REMEDIAL ALTERNATIVES
<br /> FORMER CONTIGROUP GRAIN ELEVATOR
<br /> 1805 Harbor Street
<br /> STOCKTON,CA
<br /> ATED
<br /> AS PRESENTED IN CAP DATED OCTOBER,2004 BY GEOMATRIX' AS PRESENTED IN CAP ADDENDUM DC,
<br /> _ ..
<br /> MARCH,2005 BY HUFF&HUFF,IN
<br /> Alternativef Alternative
<br /> Option Alternative 1 Alternative 2 Alternative 3 Alternative 4 Alternative 5 Alternative 6 Alternative 7 A l e 2 A3
<br /> Natural Excavation:Tank Excavation: Excavation: Excavation:
<br /> Attenuation: Enhanced in-situ Area to 1'Below Excavation: Complete With On Exeavation: Removal of Excavation:5'
<br /> Description of 14'-17'Into
<br /> Free Product Bioremediation:Air Watertable and Excavation:Tank Site Low- Into Watertable
<br /> Remedial Alternative Removal and Sparging and Enhanced Area Limited With Off- Temperature Complete With Off- TPH 1 1-1 Laterally to Waally out
<br /> Site Disposal Site Disposal mglkg 94'-9T Laterally aut to
<br /> Quarterly Bioventing Bioremediaion& Thermal Into Watertable MW-3 MW-3
<br /> Monitoring Product Removal Desorption
<br /> Volume of impacted
<br /> Soil To Be Removed N!A NIR 117 yd' 780 yd' 5,300 yd' 8,400 yd' 8,400 yd' 850 yd' 627 yd' 961 yd'
<br /> For Disposal
<br /> Volume of
<br /> Overburden To Be NIA NIA 390 Yd3 390 yd' 2,650 yd' 4,200 yd' 4,200 yd' 506 yd' 672 yd' 672 yd'
<br /> Removed
<br /> Poor-40%Mass
<br /> Moderate to Pcoi: Poor:15%Mass Pcor:75%Mass Good:Removes Good:Removes Good:Removes
<br /> Site Specific Good:Already Removal,Clean Good:Removes Al Good:Removes A]I
<br /> Effectiveness Occurring at Site Clay Rich Soils Will Removal,Clean Fill Fill to Become Removal,Off-Site Residual Impacts Residua!Impacts Majority of Majority of Majority of
<br /> Inhibit to Become Impacted Impacted Residual Impacts Impacted Soil Impacted Soil Impacted Soil
<br /> 6 Months#o G Months to 1 Year(pending 1 Year(pending 6 Months to
<br /> G Months to 6 Months to o Months to
<br /> Implement; approval of access approval of access Implement;
<br /> Time To Achieve 1 Yr.to Implement Implement; Implement; Imp}ement;Years Implement;Years
<br /> WOO's Relatively Long 10 Years Operation Relatively Long To Relatively Long Relatively Long To. agreements and agreements and Years to to Decades to to Decades to
<br /> Achieve WQO's
<br /> To Achieve Achieve WQO's Permits from permits from Decades to Achieve WQO's Achieve WQO's
<br /> WQO's mu]tiple agencies) multiple agencies) Achieve WQO's
<br /> Easily Difficult due to RR Difficult due to RR Implementable; Implementable;
<br /> Implementability Implementable bnplemerEtable Implementable Implementable Implementable Constraints Constraints Shoring is Not Implementable Shoring is Not
<br /> Cost Effective Cost Effective
<br /> cost $140,100 $2,351,500 $246,700 $613,240 $1,837,400 $5,156,300 $3,123,700 $$298,56 to $$183,D00 5$322,50 to
<br /> 5298,500 $183,000 5322,500
<br /> Pounds TPH(,. To 18,000 lbs 33,750 lbs 11,342 lbs
<br /> Be Removed
<br /> l NIA z NIA 6,750 Ibs TPH,,,, Pl1«,0� I PH�,.da 145,000 lbs Ti 45,000 lbs TPHty..nl Ti10,188 Ids TPHiy,dj 11,640 Ibs TPFiIg
<br /> Cost per Pound of , $34.0711b $54.44s11b $69.42f€b $22,4411b to $1482ilb to $2373!1%i
<br /> o
<br /> TPHc-or Removed I NIA r36aTPH ,r TPH, ,i7 $114,581IbTPH TPHtr_3j 526.321Ib $17.96Ib $277011b
<br /> TPHia,Eif TPH,,-,, TPl-1,9.u}
<br /> Information provided from the original CAI'concerning Alternatives.1-7 is derived from the GEQMATfiIX document dated October,2004.
<br /> �An estlniate of TPII,q,,,removed was not provided by GEOMRTRIX In the.October 2004 CAP,Thereto+z,costllb,TPf{r�nr could net be presented_
<br />
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