Fort Walton Beach Ordinance — 1750 sale real property 109 Ready — reading text

surface and of surface water and sediment, sampling, sampling subsurface soils. I conductivity survey terrain Surface Geophvsical Survey. An electromagnetic ( EM) an investigation which has was conduc ted using a Geonics EM- 31 survey instrument, EM survey was to identify II depth of approximately magnetic anomalies indicative 15 feet. The purpose of the of buried material and to identify above - background conductive plumes of contaminated areas that could be indicative of underlying The fire training area was surveyed using a rough 50- foot grid 1:0,'I groundwater. pattern established using a compass and measuring, tape. Locations of magnetic Several EM traverses were run along anomalies marked with survey stakes. were landfill area and were used accessible perimeter of the known areas on the I randomly to aid in assessing the boundary of the fill area. assist in the assessment of the presence of potential buried sources of This information was used to of site, assessment of onsite sources contamination on the fire training of and in location contamination (landfilled wastes) beneath private properties, monitoring wells for groundwater sampling. the EM survey. found in the fire training area by No evidence of buried drums was 1'1 EM survey along the landfill boundaries did not identify conductive either that very little material was disposed plume or that would migration, suggesting of the material and that would generate conductive leachate or that stabilization the plume to near background levels. dilution had already reduced In order to assess the presence and nature of Samplin~ Locations and Rationale. and soil at surface water, sediment, contamination at the site, the groundwater, II the site were sampled for laboratory analyses. Groundwater samples the three pre- existing monitoring were collected wells in the from 15 locations, which included well at Environmental Waste Systems. fire training area and one pre- existing Ii Deeper wells were installed at three of the the presence of dense non aqueous phase liquids shallow well locations for assessing or their dissolved components. collected. Surface and subsurface soil samples were A total of eight surface were collected from five locations and surface water only was 1. water and sediment collected from three stormwater drains. Table 3 p~ ovides a summary of all samples locations. collected and Figure 3 notes their J All samples except one groundwater sample and two soil samples were analyzed TAL) metals and Target Compound List ( TCL) for volatile and Target' Analyte List ( PCBs). The and polychlorinated biphenyls ( semivolatile organics, pesticides, with of Laboratories in accordance 11 analyses the FDEP' s completed by the FDEP' s Bureau were Comprehensive Quality Assurance Plan ( CompQAP # 8706886) with Services Divisions. EPA Region IV Environmental modifications approved by the was also included for TICs) E,:,I Identification of tentatively identified compounds ( Well No. 11 was analyzed for the TCL analyses. The groundwater sample from City from the FOP TAL metals and two surface soil samples TCL volatile organics and for metals only. pistol range we~ e analyzed i 1- j RAl.P2 tI F..Al ('/ 24185) 10  fil i.:I II Table 3 Sampling Rationale r Site Inspection Report Ready Avenue Landfill Fort Walton Beach, Okaloosa County, Florida I Sample Media Designation Location Groundwater RLGW-01, Background shallow monitoring well installed west of landfilled areas. r:') Groundwater RlGW-02 Shallow monitoring well installed on southeastern corner II of landfill. Groundwater RlGW-03, Shallow monitoring well MW- 1, existing southwest of fire training area. I Groundwater RLGW-04, Shallow monitoring well MW-2, existing east-southeast of the edge of the fire training area. Groundwater RLGW-05, Shallow monitoring well MW-3, existing west- northwest of II the fire training area. Groundwater RLGW-05D, Deep monitoring well installed in a cluster with MW.3 for control. IJ Groundwater RlGW-06 Shallow monitoring well installed on western boundary of landfill, near northern edge of reported fill area. Groundwater RLGW-07 Shallow monitoring well installed near northeastern behind Environmental Waste prop- corner of filled area,