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Arthur Wyatt -3- April 27, 2009 <br /> i Claim No. 1088 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /kg) ESLs `iF' Water (ug/L WQOs <br /> Maximum Latest Shallow 2 Maximum Latest ,r (ug/L) <br /> Soil' Industrial Nov 08 <br /> Residential Dermal (. ) <br /> m Ik (mglkg) <br /> TPH-g NA NA 83 450 270,000 •,720 5 <br /> TPH-d NA NA 83 450 48,000 ;NA 56 <br /> Benzene NA NA 0.044 0.27 `25,000 <0.5 0.15 <br /> Toluene NA NA 2.9 210 44,000 '<0.5 42 <br /> Eth lbenzene NA NA 2.3 5.0 .,4,400 412 29 <br /> Xylenes NA NA 2.3 100 27,000 20.1 17 <br /> MTBE �., . :-. .NA- fr -NA— - 1-0-.023- x,. 5 .:5;900 �- --=-28.x. ..- <br /> TBA NA NA 0.075 320,000 ::.300 <10 12 <br /> 1,2-DCA NA NA 0.0045 0.48 `t`1.5 <0.5 0.5 <br /> Lead NA NA 200 750 iE NA t NA 15 <br /> PCE NA NA 0.37 1 0.95 NA INA 1 .06 <br /> TCE NA NA 0.46 4.1 i °NA k NA 0.8 <br /> 1 Environmental Screening Levels(ESLs)Shallow Soil<3m,Groundwater is source of Drinking Water.' <br /> 2 ESLs,Shallow Soil Screening Levels,Groundwater not source of Drinking Water,Commercial Use,lDirect Exposure, <br /> Worker h,kt4. <br /> NA Not Analyzed, Not Applicable,or Data Not Available <br /> WQO Water Quality Objectives , ', <br /> FP Free phase product in site wells ,g <br /> V. FREE PRODUCT:--none identified s.t 4 " •4 <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volumet+., '� <br /> d <br /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction <br /> DURATION: Jan 05 through present, discontinued:4 -, <br /> • MASS REMOVED: 5786 pounds of TPH-G <br /> • . INFLUENT CONCENTRATION MAR-07:-<50 <br /> w <br /> C. Groundwater.Remediation: - <br /> • METHOD: groundwater extraction <br /> • DURATION: Oct 01 through Mar 05 ' r;. ' <br /> • VOLUME OF GROUNDWATER EXTRACTED: 2.7A.-million gallons <br /> • MASS OF MTBE REMOVED: 10.5 pounds _ - <br /> MASS OF TP:H-G REMOVED: 73 pounds " <br /> IV <br /> ql. <br /> s <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br />