We conducted Phase II environmental site assessments of this development site to analyze the impacts of an on-site livestock dipping vat, in preparation for a proposed real estate transaction. We installed 42 soil borings to assess extent of arsenic and organochlorine pesticide-affected soils and groundwater, and samplings of public water wells located within a 500’ radius of the dipping vat. We also conducted a risk-based assessment to calculate use of TCEQ Texas Risk Reduction Program Tier 2 Protective Concentration Levels for residential sites.