The geology consists of very fine to coarse sand and gravel with occasional cobbles. This is underlain by highly weathered and decomposed bedrock ranging from 11 to 17.5 ft. bgs. with contaminatio extending to an approximate depth of 20 ft. bgs. The ground water velocity is fairly slow.
Targeted Environmental Media:
 Fractured Bedrock
Site area is ~20,000 sq. ft at an interval of 11 to 20 ft bgs.
Field pilot program: November 2000
Two separate plumes BTEX and MTBE.
Major Contaminants and Maximum Concentrations:
- Benzene-toluene-ethylbenzene-xylene (BTEX) (4,900 µg/L)
- Methyl tert butyl ether (450 µg/L)
No technologies selected.
- Chemical Oxidation (In Situ)
Comments:
Two ten day injection events was completed in November 2000. Results indicated a 66% decrease of total average BTEX contamination and 62% decrease of the total average MTBE concentrations.
ISOTEC recommending site closure based on program results, which remain below the applicable regulatory criteria
On July 17, 2001 the NYSDEC issued a No Further Action letter based on the results.
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