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• 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 /> i <br /> Thornton California <br /> Benzene Toluene Eth lbenzene Xylenes <br /> SUBSURFACE SOIL (milligrams per kilogram) _ <br /> volatilization to residential0 0789 RES RES RES <br /> outdoor air <br /> commercial 0 133 RES T RES RES <br /> �a or intrusion to residential ential 0 0016 206 427 RES <br /> �uildings <br /> commercial 00032 545 1100 RES <br /> leachate to protect residential 0 005 129 575 RES <br /> groundwater ingestion <br /> commercial 0 017 361 1610 RES _ <br /> Maximum Site Concentration _ Not Detected 1 017 2 3 22 <br /> GROUNDWATER (micrograms per liter) <br /> volatilization to residential 3190 > S > S > S <br /> outdoor air <br /> commercial 5340 > S > S > S <br /> ILIapor intrusion to residential 69 32,800 77,500 >S <br /> buildings <br /> commercial 21 85 000 > S > S <br /> ngestion 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 /> Tier1 wk4 FLUOR DANIEL GTI <br />