19-23 Proposal_55 Lakeside Avenue-REV.pdf

F:\2021\21-1041 - Township of West Orange Phase I ESAs Downtown Corridor\Proposal\Additional Remedial Investigation - 55 Lakeside\RI Proposal_55 Lakeside Avenue-REV.docx 2 by posting a sign in accordance with N.J.A.C. 7:26C-1.7(h)2. • Prepare, distribute, and publish a fact sheet/notification letter in accordance with N.J.A.C. :26C-1.7(I) for the groundwater contamination that is migrating off-site. The notification letters will be sent to owners and tenants within 200 feet of the Site boundary. • The completion of the Annual Remediation Cost Review and Remediation Funding Source Form. TASK 2: ADDITIONAL REMEDIAL INVESTIGATION ACTIVITIES Quality Assurance Project Plan (QAPP) and Health and Safety Plan (HASP) The QAPP and HASP prepared for earlier investigation activities will be updated prior to the commencement of the additional RI field activities, in accordance with requirements in the TRSR and following the NJDEP QAPP Technical Guidance, and 29 CFR Parts 1910 and 1926 of the Federal Occupational Safety and Health Administration (OSHA) regulations. Due to safety concerns (i.e., mold and no power) associated with building interiors, Matrix will take special precautions when entering interior spaces. These precautions will include half face respirators, battery powered and generator powered lighting, maximized ventilation, and the buddy system. These precautions will accrue some additional costs and are included in this proposal. Exterior Soil Sampling Based on the remedial investigation activities completed in May 2022 and August 2022, there are a few areas of concern (AOCs) requiring additional delineation in accordance with the requirements of NJDEP regulations and guidance, and as discussed in our technical consult with NJDEP on October 18, 2022. These AOCs include: • AOC-2A – 500-gallon Diesel UST • AOC-3A – Rail Spur and Siding Between Former Buildings 21 and 43; • AOC-3B – Shipping Shed; • AOC-7 – Historic Sanitary and Storm Water Management; • AOC-10 – Historic Fill at Upper Parking Lot; • AOC-12A – Former Oil House; • AOC-16 – Dumpster Area; and • AOC-24 – Co-Jac Finishers Hazardous Material Storage and Handling Area. The additional RI will include the installation of up to 35 exterior soil borings to a depth of 10 to 20 feet below ground surface (ft bgs) with soil samples collected at multiple depth intervals, if required. A breakdown of the

de the installation of up to 35 exterior soil borings to a depth of 10 to 20 feet below ground surface (ft bgs) with soil samples collected at multiple depth intervals, if required. A breakdown of the exterior soil borings per AOC are as follows: • AOC-2A – 500-gallon Diesel UST o Soil Boring SB-15E - Horizontal delineation of trichloroethene (TCE) at soil borings 3B-1 and 3B-2 (please note this boring is co-located with the eastern delineation sample of AOC-3B) • AOC-3A – Rail Spur and Siding Between Former Buildings 21 and 43 (See Figure 4A-2 for reference); o Soil Boring AOC3A-5R - Vertical delineation of TCE at soil boring AOC3A-5 o Soil Boring SB-17E-1 - Horizontal delineation of TCE, mercury, and lead east of soil boring SB-17E o Soil Boring SB-17N - Horizontal delineation of mercury, lead, and copper north of soil boring SB-17 o Soil Boring 10-1S-1 - Horizontal delineation of TCE south of soil boring 10-1S o Soil Boring 10-1W-1 - Horizontal delineation of TCE west of soil boring 10-1W