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J DAVIS AV <br /> v) <br /> ULA <br /> �r <br /> Building 21.A <br /> Model Airplane Skeet Trap <br /> Subarea <br /> Landing Strip <br /> CouN— "o <br /> MCCLOXAV <br /> uildi g 128 <br /> PINTER AV <br /> pG 1 <br /> GILLISSAV 011 l -------- ------ <br /> _. 1 N. <br /> Building 129 <br /> 4. <br /> R e <br /> 0 <br /> • W <br /> a <br /> � o <br /> 0 <br /> s { <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 Anchor QEA(2018). Feet <br /> ® Soil Sample Location(Haley&Aldrich,2020) Data Set Boundary 2.Soil data presented were collected to maximum depths of 20 feet below ground surface. <br /> Benzo(a)pyrene Results Soil Sample Location O Site 47 Pre-Decisional LUC Boundary 3.The screening level(SL)of 1,300 pg/kg is the cancer screening level for commercial or <br /> Residential SL=110(pg/kg) Q Approximate Location of Firing Point industrial soil from:DTSC HERO,2019.Human Health Risk Assessment(HHRA)Note. HERO N Benzo(a)pyrene Concentrations in Soil <br /> Sediment Core Symbology HHRA Note Number:3. DTSC-modified Screening Levels(DTSC-SLs).Table 1 (Soil).Release <br /> Industrial SL=1300(Ng/kg) Historical and Current Site Features <br /> Hatched interval indicates non- date:April 2019. Site 47 <br /> L____] Not Detected Trap Shotfall' Size of overall core�HHFanalyzed segment(0-1.5 ft bgs) 4.The DTSC HERO(2019)cancer screening level for residential soil is 110 pg/kg. Port of Stockton, Rough&Ready Island <br /> 0 <1x SL ® Trap Shooting Area of Maximum Shotfall' reflects total core depth F Solid interval indicates 5. DTSC=Department of Toxic Substances Control Stockton, California <br /> 1 -2x SL analyzed segment(1.5-3 ft bgs) 6. HERO=Human and Ecological Risk Office <br /> 0 L Skeet Shotfall' 7. pg/kg=microgram per kilogram Geosyntec D Figure <br /> - 2-5x SL EL 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 8b <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\2022-02_DraftRAP\Fig8b_13enzo(a)pyreneInSoiI.mxd 2/8/2022 11:30:16 AM(Author:howie.chen) <br />