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TABLE 2:SAMPLING RATIONALE AND PROPOSED LABORATORY ANALYSES FOR SOIL,SOIL VAPOR,AND QA/QC SAMPLES Phase II Environmental Site Assessment,125 N Stockton Street,Lodi,CA Targeted Concerns(see table at the bottom of page Analyses for Soil Analyses for Soil Samples Borehole Sample ID Sample for details on Concerns A-F) Vapor ID Depth(tt) VOCs and Helium PAHs A B C D E F (Method TO-15/ (Method 8270 Arsenio Lead Asbestos VOCs&TPHg TPHd&TPHo ASTM D-1945) SIM) (Method 6010B) (Method 6010B) (Method 600) (Method 8260B) (Method 8015) B1-S-1 1 X X X X B1-S-3 3 X X H H B1-S-5 5 X X H H X X B1 B1-S-10 10 X H H X X B1-S-15 15 X H H B1-SV-5 5 X X B1-SV-15 15 X X B2-S-1 1 X X X X X X B2 B2-S-3 3 X X H H X X B2-S-5 5 X X H H H H B3-S-1 1 X X X X X X B3 B3-S-3 3 X X H H X X B3-S-5 5 X X H H H H B4-S-1 1 X X X X X X B4-S-3 3 X X H H X X B4 B4-S-5 5 X X H H H H B4-SV-5 5 X X X B4-SV-15 15 X X X B5-S-1 1 X X X X X X B5 B5-S-3 3 X X H H X X B5-S-5 5 X X H H H H B6-S-1 1 X X X X X X X X BB-S-3 3 X X X X H H X X B6 B6-S-5 5 X X H H H H H H B6-SV-5 5 X X X B6-SV-15 15 X X X B7-S-1 1 X X X X X X X X B7 B7-S-3 3 X X X X H H X X B7-S-5 5 X X H H H H H H B8-S-1 1 X X X X X X X X B8 BB-S-3 3 X X X X H H X X B8-S-5 5 X X H H H H H H B9-S-1 1 X X X X X X X X B9 B9-S-3 3 X X X X H H X X 89-S-5 5 X X H H H H H H B10-S-1 1 X X X B10-S-3 3 X H H B10 B10-S-5 5 X H H B10-SV-5 5 X X B10_SV_j 51 15 1 1 1 X X Total#of Samples to be Analyzed 8 8-12 8-12 10-21 10-21 18-27 18-27 Trip Blank One per day of soil sampling at the Property. -- -- -- 3' Al least 1 per 20 soil samples,min 1 per day of soil sampling QmQC Equipment Blank per piece of reusable equipment. -- 3-6 3-6 3-6 3-6 3-6 3-6 Samples MS/MSD At least 1 per 20 samples. 1 1 1 1-2 1-2 1-2 1-2 Field Duplicates At least 1 per 10 samples. 1 1-2 1-2 1-3 1-3 2-3 2-3 Total Estimated Number of QA/QC Samples to be Analyzed per Method 2 5-6 5-6 5-8 5-8 9-11 9-11 Notes: COCs=constituents of concern;DTSC=Department of Toxic Substances Control;MS/MSD=matrix spike/matrix spike duplicate;OSHA=Occupational Safety and Health Administration;PAHs=polycyclic aromatic hydrocarbons;QA/QC=quality assurance/quality control;SIM=selective ion monitoring;SLs=screening levels;TPHg/d/o=total petroleum hydrocarbons as gasoline/diesel/oil;VOCs=volatile organic compounds. An X indicates the collected sample will be scheduled for analysis.An H indicates the collected sample will be held pending analysis should the overlying sample report elevated concentrations of constituents that require vertical delineation. 1-An estimated three trip blanks will be required for the proposed scope of work;however,should soil sampling be take more than two days,additional trip blanks will be required to maintain the'one per day of soil sampling'rate. Key Environmental Concern Primary COCs A Potential residual impacts to soil from former manufactured gas plant. TPHg/d/o,VOCs,PAHs,lead,and arsenic B Potential impacts to soil and soil vapor from former UST. TPHg/d/o,VOCs,and lead C Potential impacts to soil vapor from regional solvent plume in groundwater. VOCs D Potential impacts from spills within workshop building. TPHg/d/o,VOCs,and lead E Potential impacts from spills or leaks associated with the current AST. TPHg/d and VOCs F Potential presence of lead-containing materials and asbestos in demolition debris beneath the Property. Lead and asbestos Stantec Page 1 of 1 8/12/2022