121-18 Attachment.pdf

ASSOCIATES Mr. Leonard R. Lepore, PE April 18, 2018 Municipal Engineer/Director of Public Works Page 4 of 10 Re: Fire House No. 4, 280 Pleasant Valley Way- LSRP Services Site. Upon the closure of the two USTs, CME will prepare and submit two revised UST Facility Certification Questionnaires documenting the closure and requesting the delisting of the two USTs on the NJDEP database. Task 3: Monitoring Wells Abandonment of (MW-1, MW-4 & MW-11) and Installation of MW-4R and MW-1R In order to comply with NJDEP regulations, CME will retain a NJDEP licensed well driller to properly abandon monitoring wells MW-1, MW-4 and MW-11, as these wells are located in the vicinity of the excavation area. The wells will be sealed in accordance with the requirements of N.J.A.C. 7:9D with cement-bentonite grout. After completing the excavation work, CME will retain a New Jersey licensed driller to install replacement for monitoring wells MW-1R and MW-4R. The monitoring wells will be constructed in accordance with the NJDEP Monitoring Well Requirements for Unconsolidated Aquifers. The monitoring wells will be developed by pumping groundwater into 55-gallon drums until clear and sediment-free water is obtained from the well. The wells cuttings will be containerized in 55-gallon drums on Site for future off-Site disposal at an approved disposal facility. A total of 10 drums will be disposed of and the cost is included in this proposal. A New Jersey licensed land surveyor will survey the newly installed monitoring wells and the NJDEP required certifications (Form A and B) will be prepared and submitted to the NJDEP in accordance with the NJDEP requirements. Task 4: Scope of Work and Supervision for Impacted Soil Excavation & Post- Excavation Soil Sampling CME proposes excavating and removal of impacted soil that acts as a source of groundwater contamination at a limited area located between MW-11 and MW-4 in front of the garage doors. The suspected impacted soil area is mainly located closer to MW-4. The Attached Figure presents the approximate extent of suspected impacted soil and proposed excavation. CME will prepare the scope of work and informal excavation specifications for the Township of West Orange to provide it to the selected contractor. The Township of West