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Phase H Environmental Site fissessment Tracy, California <br /> Home Depot, U.S.A. Inc. <br /> • The groundwater grab samples were analyzed for gasoline and diesel range petroleum <br /> hydrocarbons, TRPH, volatile organic compounds (VOCs), and chlorinated pesticides and <br /> herbicides. <br /> • The surficial soil composite samples were analyzed for chlorinated pesticides and herbicides. <br /> Based on the Phase II assessment results, WESTON presents the following conclusions: <br /> • No physical indication (i.e., appearance or odor) of environmental impacts was observed in <br /> any of the soils or groundwater sampled at the property. <br /> • Analyses for total recoverable petroleum hydrocarbon (TRPH) in soils from the borings and <br /> in the groundwater grab samples all yielded non-detect results. Further, analyses of the <br /> groundwater grab samples for total petroleum hydrocarbons in the gasoline and diesel ranges <br /> (TPH-g, TPH-d) and for volatile organic compounds (VOCs) also yielded non-detect results. <br /> Therefore, no indications of impacts to subsurface soils or groundwater from petroleum <br /> hydrocarbons or VOCs were found in the study area. <br /> • Analyses for organochlorine pesticides and chlorinated herbicides in surficial soil composite <br /> samples and groundwater grab samples yielded non-detect results with one exception. The <br /> herbicide Dalapon (2,2-dichloropropionic acid) was found in one composite surficial soil <br /> sample at a concentration of 270 ug/kg, which is just above the detection limit for this <br /> compound. Soils containing trace Dalapon residues are not regulated as hazardous waste. <br /> Further, the concentration found in the soil is below the USEPA Region IX Preliminary <br /> Remedial Goal (PRG) for Dalapon in residential use soils. Therefore, no indications of any <br /> significant impacts to soils or groundwater from these types of pesticides and herbicides were <br /> found in the study area. <br /> • WESTON concludes that the existing site soils and the groundwater at the subject property <br /> do not appear to show evidence of environmental impacts that would present a concern with <br /> respect to the proposed development of the property. <br /> SAwhc\wp\sharedI\projects\homedepo\tracyph2.doc ES-2 July 1999 <br />