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1 1 9 organochlorine pesticide residues were detected in the soil samples (Salomon , 2000) . Four of the tested sites require (d ) consideration or action : Granular material on the Pryor tract . A granular material found on the property was tested . Based on the concentrations and presence of trace metals , the material was most likely fertilizer. A positive identification was not possible however, because it was not analyzed for nitrogen and phosphorus . The survey report stated that because zinc ' potentiates the effects of other metals , the concentrations of copper, mercury , and zinc in the material could be toxic to aquatic benthic organisms . The survey report recommended that the material should be removed from the tract . Status : The material was removed along with other debris such as paint cans in 2000 . No further action should be needed . 1 Unvegetated area on Pryor tract . Test results on the sample did not indicate the cause for the lack of vegetation on this area . The survey report recommended that if wetland restoration is planned for this area , that it may be advisable to conduct some sediment toxicity tests to ensure that potential harm to wildlife from this area would not occur. Contacting former property owners for additional insight and testing for petroleum hydrocarbons were additional suggestions , dependent on plans for the site ( Figure 7) . ' Status : Further investigation needed dependent on management activities . Pesticide mixing/storage area on Surman tract . Copper was high (523 ppm ) , indicating the use of a copper-related fungicide (e . g . copper sulfate) . This level was nearly twice the Effects Range Median (ERM ) of 270 ppm , which is an effect-based sediment guideline above which the concentration is frequently expected to be toxic to most aquatic benthic organisms . The sample copper concentration was also higher than Florida ' s residential soil clean - up level of 110 ppm for hazardous waste sites , but well below the commercial/industrial soil clean - up level of 76 , 000 ppm . Zinc and magnesium concentrations were also high , but toxicity from these metals is not expected ( Eisler, 1993) . No action was recommended if there will be little potential for ' wildlife to be exposed to soils in the area . However, the survey report recommended not to reconfigure a wetland in this area without further delineation of the contaminant to determine the potential for deleterious effects on wildlife exposed to this site ( Figure ' 7) . Status : As of the writing of this assessment , plans are to excavate a freshwater lake in this area . Further investigation needed and possible remedy, if excavation of sediment does not completely remove the contaminant. rIsolated white mangrove swamp on Surman tract. Copper concentration of 289 ppm was slightly higher than the ERM , indicating a potential toxicity to benthic invertebrates at this site . Copper does not generally accumulate in the food chain , but the copper concentration could reduce food availability in this area . Zinc , magnesium , and boron were also elevated but not believed to pose any threat to wildlife . The survey report recommended further evaluating contamination at this site ( Figure 7) . Status : Further