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� r i <br /> Table 6 <br /> California Tier 1 Risk-Based Screening Level (RBSL) Look-Up Table (ASTM E 1739-95) <br /> Cancer Risk = 1 E-6 (benzene) and Chronic HQ = 1 (others) <br /> Former Drake Property <br /> 26485 Thornton Road <br /> Thornton California <br /> Benzene Toluene Eth (benzene I ylenes <br /> SUBSURFACE SOIL (milligrams per kilogram) <br /> volatilization to residential 007-89 RES RES RES <br /> loutdoor air <br /> i <br /> i commercial 0 133 RES RES RES <br /> ,Vapor intrusion to residential 00016 206 427 RES <br /> buildings l <br /> commercial 00032 54 5 1100 RES <br /> 'i <br /> ,leachate to protect residential 0 005 129 575 RES I <br /> groundwater ingestion <br /> commercial— 0 017 361 1610 RES ;I <br /> Maximum Site Concentration - � Not Detected 017 2 3 �2 2 <br /> -- - — <br /> iGROUNDWATER (micrograms per liter) <br /> Ii volatilization to residential 3190 > S > S > S <br /> outdoor air <br /> il commercial 5340 > S > S > S <br /> ;vapor intrusion to residential 69 32,800 77,500 >S <br /> �buildmgs <br /> commercial 21 85,000 > S > S <br /> Ingestion residential 08 7300 3650 73,000 <br /> commercial 29 20,400 10,200 > S <br /> Maximum Site Concentration 05 091 1 3 62 <br /> Maximum Theoretical Concentration Not Applicable 110 420 1830 *- <br /> Note Benzene RBSL has been adjusted for California's 0 29 factor <br /> Tierl wk4 FLUOR DANIEL GTI <br />