44-25 Exhibit B-Complete - VI Letter Report - DPW West Orange - April 2023.pdf

TABLE 2 SUB-SLAB SOIL GAS SAMPLE ANALYTICAL RESULTS (APRIL 2023) West Orange DPW - 25 LAKESIDE AVENUE WEST ORANGE, ESSEX COUNTY, NEW JERSEY NJDEP SRP PI# 014423 SAMPLE ID: LAB ID: COLLECTION DATE: SAMPLE MATRIX: SSSG-1 L2317290-06 4/1/2023 Soil-Gas Screening Levels SSSG-2 L2317290-07 4/1/2023 SOIL_VAPOR NJ-RSGS NJ-NRSGS CAS (ug/m3) (ug/m3) Conc 71-55-6 79-34-5 79-00-5 75-34-3 75-35-4 120-82-1 95-63-6 106-93-4 95-50-1 107-06-2 78-87-5 108-67-8 106-99-0 541-73-1 106-46-7 123-91-1 540-84-1 78-93-3 95-49-8 107-05-1 622-96-8 108-10-1 67-64-1 71-43-2 75-27-4 75-25-2 74-83-9 75-15-0 56-23-5 108-90-7 75-00-3 67-66-3 74-87-3 156-59-2 10061-01-5 110-82-7 124-48-1 75-71-8 64-17-5 100-41-4 76-13-1 76-14-2 142-82-5 87-68-3 67-63-0 80-62-6 1634-04-4 75-09-2 110-54-3 95-47-6 179601-23-1 100-42-5 75-65-0 127-18-4 109-99-9 108-88-3 156-60-5 10061-02-6 79-01-6 75-69-4 593-60-2 75-01-4 260000 1000 100 3100 15 10000 360 38 42000 28 260000 160000 18 260 36000 23 2600 520000 5100 4700 310000 56 260000 540 14000 36000 5200 5200 52000 540 260000 34 32 1100000 4400 440 13000 15 44000 1500 170 180000 120 1100000 660000 79 1100 150000 100 11000 2200000 21000 20000 1300000 250 1100000 2400 61000 150000 22000 22000 220000 2400 1100000 150 140 2.8 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1.9 ND ND ND ND 4 ND ND ND ND ND ND ND ND 2.1 ND ND ND 0.69 ND 15 ND ND ND ND ND ND ND ND ND 4.9 ND ND ND ND ND 67 ND ND ND ND 97 26 ND ND ANALYTE Q SSSG-3 L2317290-08 4/1/2023 SOIL_VAPOR RL MDL Conc 1.1 1.4 1.1 0.81 0.79 1.5 0.98 1.5 1.2 0.81 0.92 0.98 0.44 1.2 1.2 0.72 0.93 1.5 1 0.63 0.98 2 2.4 0.64 1.3 2.1 0.78 0.62 1.3 0.92 0.53 0.98 0.41 0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 4.3 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5.2 ND 2.3 ND ND ND 1.3 ND ND 1.8 ND ND ND ND ND 2.7 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 75 ND ND ND ND 230 5.1 ND ND 0 - - 1.55 - Q SSSG-4 L2317290-05 4/1/2023 SOIL_VAPOR RL MDL Conc 1.1 1.4 1.1 0.81 0.79 1.5 0.98 1.5 1.2 0.81 0.92 0.98 0.44 1.2 1.2 0.72 0.93 1.5 1 0.63 0.98 2 2.4 0.64 1.3 2.1 0.78 0.62 1.3 0.92 0.53 0.98 0.41 0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 5 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5.

0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 5 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5.5 ND ND ND ND ND 1.4 ND ND 9.3 ND 1.6 ND ND ND 2.9 23 ND ND ND ND ND 1.6 ND ND ND ND ND ND ND ND 270 ND ND ND ND 280 62 ND ND 0 - - ND - Q SSSG-5 L2317290-09 4/1/2023 SOIL_VAPOR RL MDL Conc 1.1 1.4 1.1 0.81 0.79 1.5 0.98 1.5 1.2 0.81 0.92 0.98 0.44 1.2 1.2 0.72 0.93 1.5 1 0.63 0.98 2 2.4 0.64 1.3 2.1 0.78 0.62 1.3 0.92 0.53 0.98 0.41 0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 1.6 ND ND ND ND ND 4.9 ND ND ND ND 1.8 ND ND ND ND 6.5 4.1 ND ND 1 7.4 40 2.5 ND ND ND 4.4 ND ND ND 5.9 0.52 4 ND 2.1 ND 2.6 28 2.4 ND ND 3.3 ND 2.7 ND ND ND 5.6 4.3 9.6 ND ND 95 ND 11 ND ND 120 33 ND ND 0 - - 10.4 2.34 3.66 1.56 1.98 4.52 4.82 2.38 1.55 1.29 1.83 1.35 3.87 Q SSSG-6 L2317290-10 4/1/2023 SOIL_VAPOR RL MDL Conc 1.1 1.4 1.1 0.81 0.79 1.5 0.98 1.5 1.2 0.81 0.92 0.98 0.44 1.2 1.2 0.72 0.93 1.5 1 0.63 0.98 2 2.4 0.64 1.3 2.1 0.78 0.62 1.3 0.92 0.53 0.98 0.41 0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 5.1 ND ND ND ND ND 2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3.1 8.8 ND ND ND ND ND 2.2 ND ND 6.3 ND 10 ND ND ND 2.4 28 ND ND ND ND ND ND ND ND 2.7 ND ND ND ND ND 120 ND 1.5 ND ND 340 5.6 ND ND 0 0 0 0 0 0 0 0 0 0 0 0 0 - 4.48 1.96 1.33 - Q SOIL_VAPOR RL MDL Conc 1.1 1.4 1.1 0.81 0.79 1.5 0.98 1.5 1.2 0.81 0.92 0.98 0.44 1.2 1.2 0.72 0.93 1.5 1 0.63 0.98 2 2.4 0.64 1.3 2.1 0.78 0.62 1.3 0.92 0.53 0.98 0.41 0.79 0.91 0.69 1.7 0.99 9.4 0.87 1.5 1.4 0.82 2.1 1.2 2 0.72 1.7 0.7 0.87 1.7 0.85 1.5 1.4 1.5 0.75 0.79 0.91 1.1 1.1 0.87 0.51 - 13 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 13 ND ND ND ND ND ND ND ND 7.3 ND 3.5 ND ND ND 2.5 19 ND ND ND ND ND ND ND ND ND ND ND ND ND ND 180 ND ND ND ND 510 10 ND ND 0 0 0 - - ND - Q RL MDL 1.8 2.3 1.8 1.3 1.3 2.4 1.6 2.5 2 1.3 1.5 1.6 0.73 2 2 1.2 1.5 2.4 1.7 1 1.6 3.4 4 1.1 2.2 3.4 1.3 1 2.1 1.5 0.87 1.6 0.68 1.3 1.5 1.1 2.8 1.6 16 1.4 2.5 2.3 1.4 3.5 2 3.4 1.2 2.9 1.2 1.4 2.9 1.4 2.5 2.2 2.4 1.2 1.3 1.5 1.8 1.9 1.4 0.84 - 0 - - NJ VOLATILE ORGANICS IN

1.6 3.4 4 1.1 2.2 3.4 1.3 1 2.1 1.5 0.87 1.6 0.68 1.3 1.5 1.1 2.8 1.6 16 1.4 2.5 2.3 1.4 3.5 2 3.4 1.2 2.9 1.2 1.4 2.9 1.4 2.5 2.2 2.4 1.2 1.3 1.5 1.8 1.9 1.4 0.84 - 0 - - NJ VOLATILE ORGANICS IN AIR 1,1,1-Trichloroethane 1,1,2,2-Tetrachloroethane 1,1,2-Trichloroethane 1,1-Dichloroethane 1,1-Dichloroethene 1,2,4-Trichlorobenzene 1,2,4-Trimethylbenzene 1,2-Dibromoethane 1,2-Dichlorobenzene 1,2-Dichloroethane 1,2-Dichloropropane 1,3,5-Trimethybenzene 1,3-Butadiene 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,4-Dioxane 2,2,4-Trimethylpentane 2-Butanone 2-Chlorotoluene 3-Chloropropene 4-Ethyltoluene 4-Methyl-2-pentanone Acetone Benzene Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-Dichloroethene cis-1,3-Dichloropropene Cyclohexane Dibromochloromethane Dichlorodifluoromethane Ethanol Ethylbenzene Freon-113 Freon-114 Heptane Hexachlorobutadiene Isopropanol Methyl Methacrylate Methyl tert butyl ether Methylene chloride n-Hexane o-Xylene p/m-Xylene Styrene Tertiary butyl Alcohol Tetrachloroethene Tetrahydrofuran Toluene trans-1,2-Dichloroethene trans-1,3-Dichloropropene Trichloroethene Trichlorofluoromethane Vinyl bromide Vinyl chloride NJ VOLATILE ORGANICS IN AIR-TIC No Tentatively Identified Compounds Butane 000106-97-8 Unknown Isobutane 000075-28-5 Nonane (C9) 000111-84-2 Acetaldehyde 000075-07-0 Decane (C10) 000124-18-5 Methyl Alcohol 000067-56-1 unknown alkane unknown alkane unknown alkane unknown alkane unknown benzene Pentane, 2-methyl000107-83-5 Pentane, 3-methyl000096-14-0 Butane, 2,3-Dimethyl000079-29-8 Cyclopentane, Methyl000096-37-7 Pentane 000109-66-0 * Comparison is not performed on parameters with non-numeric criteria. 1.9 - 2.51 - NJ - - NJ - - - - NJ-INRAL: New Jersey 2021 Indoor Air Non-Residential Rapid Action Levels - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-IRRAL: New Jersey 2021 Indoor Air Residential Rapid Action Levels - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-NRIARS: New Jersey 2021 Non-Residential Indoor Air Vapor Intrusion Exposure Pathway Remediation Standards Criteria per Remediation Standards, last amended May 17, 2021. NJ-NRIAS: New Jersey 2021 Non-Residential Indoor Air Remediation Standards - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-NRSGS: New Jersey 2021

Standards, last amended May 17, 2021. NJ-NRIAS: New Jersey 2021 Non-Residential Indoor Air Remediation Standards - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-NRSGS: New Jersey 2021 Non-Residential Soil Gas Screening Levels - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-RIARS: New Jersey 2021 Residential Indoor Air Vapor Intrusion Exposure Pathway Remediation Standards Criteria per Remediation Standards, last amended May 17, 2021. NJ-RIAS: New Jersey 2021 Residential Indoor Air Remediation Standards - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ-RSGS: New Jersey 2021 Residential Soil Gas Screening Levels - ug/m3 Criteria per May 2021 Version 5.0 Guidance Document. NJ J NJ NJ NJ NJ J J J J NJ NJ NJ NJ J J - -

N FIGURE 1 SITE PLAN DPW FACILITY TOWNSHIP OF WEST ORANGE 25 LAKESIDE AVENUE DEPARTMENT OF PUBLIC WORKS BLOCK 115, LOT 16 WEST ORANGE, NEW JERSEY 25 LAKESIDE AVENUE WEST ORANGE, NEW JERSEY 07052 NJDEP PI # 014423 CONSULTING AND MUNICIPAL ENGINEERS 3759 U.S. Hwy 1 South - Suite 100, Monmouth Junction, NJ 08852 Phone:(732)951-2101 Fax: (732)951-2106

FIGURE 2 VAPOR INTRUSION SAMPLING PLAN DPW FACILITY TOWNSHIP OF WEST ORANGE 25 LAKESIDE AVENUE DEPARTMENT OF PUBLIC WORKS BLOCK 115, LOT 16 WEST ORANGE, NEW JERSEY 25 LAKESIDE AVENUE WEST ORANGE, NEW JERSEY 07052 NJDEP PI # 014423 CONSULTING AND MUNICIPAL ENGINEERS 3759 U.S. Hwy 1 South - Suite 100, Monmouth Junction, NJ 08852 Phone:(732)951-2101 Fax: (732)951-2106

Bureau of Case Assignment &Initial Notice Re: Vapor Intrusion Investigation Report West Orange DPW 25 Lakeside Ave Appendix 1 P:\I00 CME7\West Orange\DPW 25 Lakeside Ave\VI Investigation 2023\VI letter Report\VI Letter Report - DPW West Orange - April 2023.docx April 2023 Page 13

New Jersey Department of Environmental Protection INDOOR AIR BUILDING SURVEY and SAMPLING FORM Eric Snee Preparer’s name: ____________________________________ 4/1/2023 Date: __________________________ CME Associates Preparer’s affiliation: ________________________________ (732) 951-2101 Phone #: _______________________ Department of Public Works SRP PI No. 014423 Site Name: __________________________________________ Case #: ________________________ Part I - Occupants 25 Lakeside Avenue, West Orange, NJ 07052 Building Address: ____________________________________________________________________ 16 115 Building Block: _____________ Lot: ____________ Superintendent of Public Works Joe Pelose Property Contact: ________________________ Owner / Renter / other: _______________________ Contact’s Phone: home ( 325-4153 )__________ work (973)______________ cell ( )____________ Part II – Building Characteristics Building type: residential / multi-family residential / office / strip mall / commercial / industrial Describe building: _____________________________________ masonry bldg. - DPW Offices Maintenance/Storage Garages ___ &_______________________ Sensitive population: day care / nursing home / hospital / school / other (specify): _______________ Number of floors below grade: ______ (full basement / crawlspace / slab on grade) 0 Approx. depth of basement below grade surface: ______ NA ft. Basement size: _______ NA ft2 Basement floor construction: concrete / dirt / floating / stone / other (specify): ________________ Foundation walls: poured concrete / cinder blocks / stone / other (specify) ________________ Basement sump present? Yes / No Sump pump? Yes / No Water in sump? Yes / No Trench drains in garages formerly discharged to grit boxes outside bldg. Are the basement walls or floor sealed with waterproof paint or epoxy coatings? Is there a whole house fan? Yes / No Yes / No Exhaust fans in garages Type of ground cover outside of building: grass / concrete / asphalt / other (specify) _____________ Existing subsurface depressurization (radon) system in place? Yes / No active / passive Sub-slab vapor/moisture barrier in place? Yes / No Type of barrier: ____________________________ What Type of Heating System does the building have (past & current)? Offices - forced air & electric baseboard; Maint. garage -

arrier in place? Yes / No Type of barrier: ____________________________ What Type of Heating System does the building have (past & current)? Offices - forced air & electric baseboard; Maint. garage - infrared; _____________________________________________________________________________________ Storage garage - not heated (formerly gas-fired units) D-1

Part III – Indoor Contaminant Sources Identify all potential indoor sources found in the building (including attached garages), the location of the source (floor and room), and whether the item was removed from the building 48 hours prior to indoor air sampling event. Any ventilation implemented after removal of the items should be completed at least 24 hours prior to the commencement of the indoor air sampling event. Potential Sources Location(s) Removed (Yes / No / NA) Gasoline storage cans garages garages Gas-powered equipment Kerosene storage cans Moth balls Air fresheners Fuel tank (inside building) Wood stove or fireplace New furniture / upholstery New carpeting / flooring garages, office storage space Hobbies - glues, paints, etc. LIST OTHER IMPORTANT SOURCES IDENTIFIED: ammonia solution (diazo machine) offices - utility/storage room motor oils, waste oils garages garages grease, lubricating agents garages hydraulic, transmission, brake fluids garages welding equipment NA NA NA No No Part IV – Miscellaneous Items Do any occupants of the building smoke? Yes / No Last time someone smoked in the building? How often? ______________ 20+ years ____________ hours / days ago Does the building have an attached garage directly connected to living space? Yes / No Office/garage sapces cars, trucks, & directly connected If so, is a car usually parked in the garage? Yes / No heavy equipment Are gas-powered equipment or cans of gasoline/fuels stored in the garage? Yes / No Do the occupants of the building have their clothes dry cleaned? If yes, how often? Yes / No Unknown weekly / monthly / 3-4 times a year Do any of the occupants use solvents in work? Yes / No If yes, what types of solvents are used? _______________________________________ vehicle/equipment maintenance (degreasers, cleaners, etc.) If yes, are their clothes washed at work? Yes / No Has painting or staining been done in the building in the last 6 months? If yes, when __________________ Yes / No and where? ____________________________ D-2