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Water Mality Site Assessent: Soils <br /> Perform the following for each constituent of concern. <br /> © z ,M <br /> Background 11/4/92 <br /> Soil Extract Is site <br /> Concentration <br /> µg/I extract) Begin here. soil extract STOP. <br /> M concentration 5 Soil cortstituent does not <br /> background soil yes threaten water quality. <br /> extract 7 <br /> Site Soil Multiply by <br /> no <br /> Extract extraction test dilution O <br /> Concentration factor(10 for WET; O <br /> (µg/I extract) 20 for TCLP) <br /> INl�'CAL SITIM, <br /> INF© ?MAl tEE Site soil <br /> [FRQ" Worst Case Is site <br /> Leachate soil leachate <br /> Concentration =waasli�t <br /> /l) concentration 5 So <br /> Background background ground Yes th <br /> Ground Water water l <br /> / Concentration <br /> no <br /> 0 <br /> Numerical Choose Numerical <br /> Limit to ? the larger of Limit to Protect Soil constituent <br /> Implement ` Ground Water Is®5©1 does not threaten <br /> Water Quality ;:;ate Z and (3) Beneficial yes beneficial uses. <br /> Standards Uses <br /> ...: no <br /> ® Is this <br /> Attenuation degree of <br /> Divide Required attenuation available Sa=coMtftWUZdoes©by 0 to Protect between contaminatedBackg�nd soil and ground Yas th <br /> Water Quality water 7 <br /> no Remediate soil to <br /> krwest keel achievable <br /> or to background.' <br /> ® <br /> Is <br /> this no <br /> Aofttenuation Regnuired attenuation available 'TOp• <br /> © by® to Protect between contaminated Is®<_ 7 Sal comdWent does not <br /> Beneficial soil and ground Yes yes threaten water quality. <br /> Uses water 7 <br /> Remediate sal to below <br /> beneficial use protective level <br /> no and to lowest level achievable <br /> or to background.' <br /> ' State Water Board Resolution Nos.68-16 and 92-49 and 22 CCR§2550.4, require cleanup to background unless infeasible to do so. <br /> In addition,cleanup level must present no risk to human health or to the environment(per conventional risk assessment procedures). <br />