SU0003870 SSCRPT - Laserfiche WebLink

Home Browse Search

DDD. Common name: DDD, TDE (tetrachlorodiphenylethane),product of DDT deg. Half-lives in the environment: Air: 17.7-177 h Surface water: 2-15.6 yr. Groundwater: 1680-270,000 h based on anaerobic soil study data Sediment: Soil: Fi d half life of 2-15.6 s based on observed rates of biodeg. of DDT Biota: 1191r in mussels;' Environmental Fate Rate Constants or Half-Lives: Volatilization: Aquatic approx. I mo. Oxidation: Aquatic half-life approx. 22 yr Hydrolysis: half-life of 570 d @ pH 9 and 190 yr @ pH 5 Biodegradation: Aqueous aerobic half-life of 2-15.6 yr CONCLUSIONS AND RECOMMENDATIONS From visual observations,there is no surface contamination on the subject property. Therefore, asof the date of this report, no corrective action is required within the boundaries of the property. If all of the referenced tires are to be removed from the property simultaneously, a licensed carrier must be employed to transport them to the proper disposal site since the number of tires is greater than nine. It is my professional opinion that since the property has not been in recent (within the last decade) annual or permanent crop production, it is therefore unaffected by agrichemica impac om on-si e applications. The probability of subsurface contamination from pesticides, or other types of agrichemicals that may have drifted onto the property, can be considered extremely low-to- nonexistent. This considers the environmental fate data for DDT and related compounds presented above,which would be the most likely persistent agrichemical. The depth to groundwater of 130 feet would make impact from adverse constituents a very low probability in comparison to a shallow groundwater depth. Due to the fact that the chicken coop barn has a concrete floor and all of the manure has been removed, there is no soil or groundwater threat. A groundwater threat would only be possible if there was hydraulic head pressure pushing nitrogen down through the soil profile, such as would occur from rainfall and/or irrigation. The probability for nitrate contamination of the underlying aquifers originating from surrounding septic systems is low due to the very low density of systems in the study area. Prospective buyers of the proposed parcels must realize that the subject property is surrounded by properties that raise and board horses. Consequences of this surrounding land use include: dust, odors, insects (primarily flies), machinery, trucks, exhaust and other environmental effects that may be offensive to some people. Page -5- CheW"Consulting