Site Investigation and Remediation Case Study:
UST and AST Remediation
CASE: UST and AST Remediation
LOCATION: Swedesboro, NJ
OBJECTIVE: Clean up contaminated soil at former NIKE Missile Base
STRATEGY:
- Remove 6 underground storage tanks (USTs).
- Remove 5 above ground storage tanks (ASTs).
- Remove 12 transformers.
- Remove lead paint impacted soils.
RESULTS: Remedial Investigation/Remedial Action Report submitted to NJDEP within 10 weeks from Notice to Proceed.
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The USTs located on the Site consisted of two 5,000-gallon diesel fuel tanks, three 2,000-gallon No. 2 heating oil tanks, and one 1,000-gallon leaded gasoline tank. The ASTs located on the Site consisted of five 275-gallon heating oil tanks. The transformers on the Site consisted of nine that had been previously removed from their poles and cleaned out and three that were still pole mounted and filled with oil. The lead paint impacted soils were from paint flaking off of the structures on the Site.
The tanks were abandoned following the guidance of the American Petroleum Institute’s (API) Recommended Practice for the Abandonment or Removal of Used USTs, as amended and supplemented.
First Environment performed a subsurface investigation following N.J.A.C. 7:26E-3.9(a)3, Area Specific Requirements-For Underground Storage Tanks, and sampling was completed following the NJDEP’s May 1992 FSPM. After excavating the USTs, any residual liquids in the tanks were removed and the tanks were cleaned prior to being removed from the excavation. Samples were then collected from the excavation to verify that no spill had occurred. The ASTs and transformers were opened and cleaned out prior to offsite disposal.
A total of nine of the structures onsite had been previously identified as having impacted the soils adjacent to them due to the lead paint peeling off of the structures. After clearing the vegetation around the nine structures soil was excavated from the previously identified areas and post-excavation soil samples were collected to verify the removal of all of the impacted soils. The original estimate for the soil removal was 150 tons, however due to observed field conditions an additional 100 tons were removed to ensure that all of the impacted soils were removed.
The site was formerly Nike Missile Base #PH-58 and was used by the United States Army for the “Ajax” and “Hercules” Missile Battery’s from 1955 through 1972. The Site consists of 33.17 total acres of land that is divided between two non-contiguous parcels, identified as the “Control Area” and the “Launch Area” of the Former Nike Missile Base #PH-58.
