Former Hamden Middle School Remediation – Hamden, CT

Tags: Remediation

SumCo Eco-Contracting prepared and remediated a former New Haven Water Company property adjacent to a former middle school. The project consisted of Phase III and IV site remediation on the 12-acre site. Contaminants of Concern included arsenic and lead; also detected above remedial action levels of antimony, barium, copper, mercury. This project involved 59,500 cubic yards of contaminated soils excavated, relocated, and capped onsite.

Date of Completion:

Phase 3: October, 2018

Phase 4: September 2019

Owner:

Southern Connecticut Regional Water Authority

Engineer:

WSP Engineers

Partners & Supporting Organizations:

Southern Connecticut Regional Water Authority
WSP Engineers

Details:

Phase 3 Project Elements – Remediation actions east of onsite buildings at 560 Newhall Street (5-acres total)
Phase 4 Project Elements – Remediation actions west of onsite buildings at 560 Newhall Street (7-acres total)

Phase 3 Project Elements – Remediation actions East of Onsite Buildings

Polluted material removed from polluted fill excavation area: 20,000 cy
Clean fill stockpiled from clean fill borrow pit: 10,400 cy
Shallow clean fill (0-4’ below grade) stockpiled from raised area footprint: 7,780 cy
Clean cover material encountered within polluted fill excavation area: 1,000 cy
Topsoil stockpiled from undisturbed portion of Raised Area Footprint: 400 cy

Phase 4 Project Elements – Remediation actions West of Onsite Buildings

Clean Fill from stockpile area transported to elevated field surface: 10,400 cy
Polluted material removed from polluted excavation area: 9,740 cy
Clean cover material encountered within polluted excavation area: 9,690 cy
Shallow clean fill stockpiled from raised area footprint: 9,060 cy
Topsoil stockpiled from undisturbed portion of raised area footprint: 900 cy