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J DAVIS AV <br /> -- — - -- O Z � � 1 !' it r -• <br /> - W <br /> Building 219, <br /> Model Airplane - = Skeet Trap <br /> p Subarea <br /> Landing Strip Courts --Z yy� <br /> MCCLOXAV <br /> Q� 0 Building 128 <br /> TINTER AV <br /> rn <br /> — GILLISSAV A ��� r� -------- -----. <br /> Building 129 <br /> R e <br /> 0 <br /> • W <br /> a <br /> � o <br /> � o <br /> Notes: 0 250 <br /> Legend 1.Soil analytical data were collected between 1995 and 2015 and compiled by Geosyntec and <br /> Human Health Screen Data Set Boundary Anchor QEA(2018). Feet <br /> ® Soil Sample Location(Haley&Aldrich,2020)0 2.Soil data presented were collected to maximum depths of 20 feet below ground surface. <br /> Dibenzo(a,h)anthracene Results Soil Sample Location O Site 47 Pre-Decisional LUC Boundary 3.The screening level(SL)of 310 pg/kg is the cancer screening level for commercial or <br /> Residential SL=28(pg/kg) Q Approximate Location of Firing Point Sediment Core Symbology industrial soil from:DTSC HERO,2019.Human Health Risk Assessment(HHRA)Note. HERO N Dibenzo(a,h)anthracene Concentrations in Soil <br /> an Current Features Industrial SL=310(Ng/kg) Historical d Ct Site Ft Hatched interval indicates non- HHRA Note Number:3. DTSC-modified Screening Levels(DTSC-SLs).Table 1 (Soil).Release <br /> 0 date:April 2019. Site 47 <br /> Not Detected Trap Shotfall' Size of overall coredepth <br /> HF interval <br /> segment tes ft bgs) 4.The DTSC HERO(2019)cancer screening level for residential soil is 28 pg/kg. Port of Stockton, Rough&Ready Island <br /> reflects total core depth *-Solid interval indicates 5. DTSC=Department of Toxic Substances Control Stockton, California <br /> 0 <1x SL ® Trap Shooting Area of Maximum Shotfall analyzed segment(1.5-3 ft bgs) 6. HERO=Human and Ecological Risk Office <br /> J 1 -2x SL Skeet Shotfall' 7. pg/kg=microgram per kilogram Geosyntec D Figure <br /> - 2-5x SL Skeet Shooting Area of Maximum Shotfall' 8.ft bgs=feet below ground surface <br /> - >5x SL 9. For locations with field duplicates,the primary sample data was plotted. Consultants <br /> ' Interstate Technology and Regulatory Council(ITRC).2003.Characterization and Remediation 8d <br /> of Soil at Closed Small Arms Firing Ranges.January. WR2501 B February 2022 <br /> \\oakland-01\data\GIS\Port_Of_Stockton\Rough-and-Rea dy-Isla nd-PM\Project\Site 47\2021-12_DraftRevisedFFS-2\Fig10d_Dibenzo(a,h)anthraceneInS oil.mxd 2/8/2022 11:32:03 AM(Author:howie.chen) <br />