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DEC-ULC.eZ k1Eiy;aiU: AJHN .•. � v Richland Communities, Inc. 6008.5.001.02 Lawrence&Award Property September 12, 2003 LIMITED FILL ASSESSMENT Page 2 Surface and Subsurface Conditions The surface of the study area consisted of loose sands, trees, bushes, and debris piles. The debris piles consisted of landscape debris, concrete, asphalt, wood, metal, 3 (aluminum and wooden) boats, and other miscellaneous rubble. All depths in feet identified in the logs are below the existing adjacent grade. With the exception of test pits TP-7, TP-9 and TP-10 discussed below, the test pits generally consisted of i to 3 feet of loose sandy to clayey soils that have been disked. We observed minor amounts of debris exposed by the disking activity. These locations were generally underlain by silty sand to the depths explored. Test pit 7 (TP-7) consisted of 5 feet of sand and debris underlain by silty sand. The debris encountered in the upper 5 feet included a water heater tank, metal piping from 2 to 4 inches in diameter, concrete rubble, Styrofoam, glass bottles, metal scrap, ceramics and a broken tool. The water heater tank was approximately 5 feet long and 2 feet diameter and constructed of sheet metal. We observed on end to be open and the opposite end to have a smaller opening. Monitoring of air within the tank using a photoionization detector revealed no ev-idence of chemical vapors. Test)sits 9 and 10 (1'P-9 and TP-10)consisted of a layer of sandy clay fill,one-foot, three inches thick placed over a geotextile filter fabric that was confining (top and bottom) a layer of aggregate base rock approximately one-and one-half feet thick. In TP-10, angular, rip-rap cobbles were placed tmdef the geotextile fabric. Below the fabric and cobbles the soils consisted of sandy clay and silty sand levee fill. Groundwater was first encountered from g to 13 feet below the existing ground surface. The test pita where water was encountered were left open so that a stabilized groundwater level could be measured; however, due to caving of the test pit side walls only a few of the water levels could be measured. In general the stabilized groundwater levels ranged from 8.5 to 10.5 feet below the existing ground surface. Conclusions and Limitations In general, the solid waste encountered at the site was located on the surface or disked into the upper two feet with the exception of the debris encountered in Test Pit 7. The geotextile fabric and aggregate base rock encountered in the raised bench adjacent to the levee appeared to be placed to support levee activities. Excavation of test pits below the encountered water surface was not possible due to the wet sandy soils collapsing into the excavation. No soil staining or Petroleum odors were noted during the excavation of the solid waste within the limited area of the test pits; therefore it is our opinion that the fill material explored at the site not adversely impacted from an environmental standpoint.