MMRP Site UXO 1 - Primer/Salvage Yard & POLB Mitigation Pond
The Primer/Salvage Yard and associated storage area were used from 1944 through the late 1990s in conjunction with rocket and projectile segregation, inspection, and repackaging, as well as bomb and rocket overhaul. It is also reported that thousands of projectile casings and damaged ammunition items were stored in the Primer/Salvage Yard area.
The 7th Street Port of Long Beach (POLB) Mitigation Pond is one of four tidally influenced wetland ponds created onboard the base by the POLB from 1989-1990. The pond portion of the site is located immediately south of the Primer/Salvage Yard and extends roughly 630 feet south into the pond. The pond area was used from 1944 to 1982 in association with the Primer/Salvage Yard. Prior to the pond’s creation, the site reportedly was used as an Explosive Ordnance Disposal (EOD) demonstration area and a safety demonstration area at an unknown frequency. The site was also found to contain buried munitions similar to those stored at the Primer/Salvage Yard.
A Preliminary Site Inspection (similar to a Preliminary Assessment) was completed in December 2008. A Site Inspection was completed in 2011. Based on the result of the Site Inspection, a removal action was recommended for partially exposed, buried munitions at the northwest corner of the 7th Street POLB Mitigation Pond, and a Remedial Investigation (RI) was recommended for the entire site. As part of the RI, surface clearance and geophysical surveys were completed in late 2017, followed by a geophysical anomalies investigation and soil, sediment and surface water sampling in early 2018. The RI report is scheduled to be completed in late 2018.
|Location (see map)||South-central portion of station, adjacent to and inside National Wildlife Refuge|
|Contamination Source||Munitions storage and disposal, explosives detonation training|
|Potential Waste Types||Munitions and explosives of concern, munitions constituents|
|Est. Response Complete||Unknown; pending result of Remedial Investigation|