Township Council Meeting — Packet

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

Provide any information that may be pertinent to the sampling event and may assist in the data interpretation process. Active DPW maintenance/storage garages attached directly to office space Indoor air sampled in office space only; sub-slab soil-gas sampled in offices and garages Part V – Sampling Information Eric Snee 2101 951 - __________ Sample Technician: ____________________________ Phone number: ( 732 ) _______ Company: __________________________________________________________________________ CME Associates Sample Source: Indoor Air / Sub-Slab / Near Slab Soil Gas / Exterior Soil Gas Were “Instructions for Occupants” followed? Yes / No If not, describe modifications: __________________________________________________________ Sample locations (floor, room): Sample # Location Analytical Method Sample Volume Sample Time Sample Date Sampler Type Ambient Temp ( °F) Drawing of Sample Location(s) in Building Type of field instrument used (include summary of results): ____________________________ Part VI - Meteorological Conditions Was there significant precipitation within 12 hours prior to (or during) the sampling event? Yes / No 4/1/23 - temps in 50s to 70s, periodic rain, increasing winds Describe the general weather conditions: __________________________________________________ evening of 4/1 to morning of 4/2 - thunderstorms, strong winds; 4/2/23 - 40s to 50s, partly cloudy ____________________________________________________________________________________ D-3

Bureau of Case Assignment &Initial Notice Re: Vapor Intrusion Investigation Report West Orange DPW 25 Lakeside Ave Appendix 2 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 14

Serial_No:04172317:05 ANALYTICAL REPORT Lab Number: Client: L2317290 CME Associates 3759 US Hwy 1 South Suite 100 Monmouth Junction, NJ 08852 ATTN: Suresh Puppala Phone: (732) 951-2101 Project Name: WEST ORANGE DPW Project Number: IN000380.09 Report Date: 04/17/23 The original project report/data package is held by Alpha Analytical. This report/data package is paginated and should be reproduced only in its entirety. Alpha Analytical holds no responsibility for results and/or data that are not consistent with the original. Certifications & Approvals: MA (M-MA030), NH NELAP (2062), CT (PH-0141), DoD (L2474), FL (E87814), IL (200081), LA (85084), ME (MA00030), MD (350), NJ (MA015), NY (11627), NC (685), OH (CL106), PA (68-02089), RI (LAO00299), TX (T104704419), VT (VT-0015), VA (460194), WA (C954), US Army Corps of Engineers, USDA (Permit #P330-17-00150), USFWS (Permit #206964). 320 Forbes Boulevard, Mansfield, MA 02048-1806 508-822-9300 (Fax) 508-822-3288 800-624-9220 - www.alphalab.com Page 1 of 76

Serial_No:04172317:05 Project Name: Project Number: Lab Number: Report Date: WEST ORANGE DPW IN000380.09 Alpha Sample ID Client ID L2317290-01 L2317290 04/17/23 Matrix Sample Location Collection Date/Time Receive Date IA-1 AIR Not Specified 04/02/23 12:11 04/03/23 L2317290-02 IA-2 AIR Not Specified 04/02/23 08:36 04/03/23 L2317290-03 IA-3 AIR Not Specified 04/02/23 11:58 04/03/23 L2317290-04 AA-040123 AIR Not Specified 04/02/23 11:36 04/03/23 L2317290-05 SSSG-4 SOIL_VAPOR Not Specified 04/01/23 16:56 04/03/23 L2317290-06 SSSG-1 SOIL_VAPOR Not Specified 04/01/23 14:25 04/03/23 L2317290-07 SSSG-2 SOIL_VAPOR Not Specified 04/01/23 15:09 04/03/23 L2317290-08 SSSG-3 SOIL_VAPOR Not Specified 04/01/23 13:50 04/03/23 L2317290-09 SSSG-5 SOIL_VAPOR Not Specified 04/01/23 10:09 04/03/23 L2317290-10 SSSG-6 SOIL_VAPOR Not Specified 04/01/23 11:46 04/03/23 Page 2 of 76

Serial_No:04172317:05 Project Name: Project Number: WEST ORANGE DPW IN000380.09 Lab Number: Report Date: L2317290 04/17/23 NJ DEP Data of Known Quality Protocols Conformance/Non-Conformance Summary Questionnaire 1 For each analytical method referenced in this laboratory report package, were all specified QA/QC performance criteria followed, including the requirement to explain any criteria falling outside of acceptable guidelines, as specified in the NJDEP Data of Known Quality performance standards? YES 1a Were the method specified handling, preservation, and holding time requirements met? YES 1b EPH Method: Was the EPH Method conducted without significant modifications (see Section 11.3 of respective DKQ methods)? N/A 2 Were all samples received by the laboratory in a condition consistent with that described on the associated chain-of-custody document(s)? YES 3 Were all samples received at an appropriate temperature (4 ± 2° C)? N/A 4 Were all QA/QC performance criteria specified in the NJDEP DKQP standards achieved? YES 5a Were reporting limits specified or referenced on the chain-of-custody or communicated to the laboratory prior to sample receipt? NO 5b Were these reporting limits met? N/A 6 For each analytical method referenced in this laboratory report package, were results reported for all constituents identified in the method-specific analyte lists presented in the DKQP documents and/or site-specific QAPP? YES 7 Are project-specific matrix spikes and/or laboratory duplicates included in this data set? NO Note: Page 3 of 76 For all questions to which the response was "No" (with the exception of question #7), additional information must be provided in an attached narrative. If the answer to question #1, #1a or #1b is "No", the data package does not meet the requirements for "Data of Known Quality".

Serial_No:04172317:05 Project Name: Project Number: Lab Number: Report Date: WEST ORANGE DPW IN000380.09 L2317290 04/17/23 Case Narrative The samples were received in accordance with the Chain of Custody and no significant deviations were encountered during the preparation or analysis unless otherwise noted. Sample Receipt, Container Information, and the Chain of Custody are located at the back of the report. Results contained within this report relate only to the samples submitted under this Alpha Lab Number and meet NELAP requirements for all NELAP accredited parameters unless otherwise noted in the following narrative. The data presented in this report is organized by parameter (i.e. VOC, SVOC, etc.). Sample specific Quality Control data (i.e. Surrogate Spike Recovery) is reported at the end of the target analyte list for each individual sample, followed by the Laboratory Batch Quality Control at the end of each parameter. Tentatively Identified Compounds (TICs), if requested, are reported for compounds identified to be present and are not part of the method/program Target Compound List, even if only a subset of the TCL are being reported. If a sample was re-analyzed or re-extracted due to a required quality control corrective action and if both sets of data are reported, the Laboratory ID of the re-analysis or re-extraction is designated with an "R" or "RE", respectively. When multiple Batch Quality Control elements are reported (e.g. more than one LCS), the associated samples for each element are noted in the grey shaded header line of each data table. Any Laboratory Batch, Sample Specific % recovery or RPD value that is outside the listed Acceptance Criteria is bolded in the report. In reference to questions H (CAM) or 4 (RCP) when "NO" is checked, the performance criteria for CAM and RCP methods allow for some quality control failures to occur and still be within method compliance. In these instances, the specific failure is not narrated but noted in the associated QC Outlier Summary Report, located directly after the Case Narrative. QC information is also incorporated in the Data Usability Assessment table (Format 11) of our Data Merger tool, where it can be reviewed in conjunction with the sample result, associated regulatory criteria and any associated data usability implications. Soil/sediments, solids and tissues are reported on a dry