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|Title:||Soil sampling program at Solid Waste Management Unit No. 3, Fort Buchanan, Puerto Rico|
|Authors:||U.S. Army Environmental Center.|
Llopis, José L.
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-93-2.|
Abstract: Results of a soil sampling program at Solid Waste Management Unit No. 3 (SWMU No. 3) at Fort Buchanan, Puerto Rico (FTB), are presented . In 1977, approximately 1 ton (1 truckload) of various pesticides reportedly were buried at SWMU No. 3. The precise location of the burial trench is not available from records. The suspected burial trench lies in the vicinity of a 66-in. diameter water main which supplies the city of San Juan with potable water. There is concern over the possibility of pesticide-contaminated groundwater infiltrating through the line's seals when the line is depressurized during periodic maintenance. Investigations at this site have been ongoing since 1983 and include groundwater monitoring, soil trenching and sampling, and geophysical testing. In an effort to determine the location of this trench, 52 soil samples were collected from 7 test pits and analyzed for the presence of pesticides. Test pit locations were selected based on the results of a previously conducted geophysical investigation. The results of the chemical analysis indicated tract amount of the pesticides p,p,-DDE, p,p,-DDD, p,p,-DDT, and o,p,-DDD in only one end of one test pit. These pesticide levels are not considered to be indicative of the levels expected to be associated with a pesticide disposal site but rather more indicative of amounts expected from routine pest control use. Based on visual observations during the excavation of the test pits and the results of the soil chemical analysis there is no indication of the presence of a pesticide disposal trench.
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