Laserfiche WebLink
KASA PROPERTY <br />11 December 2020 <br />Page 2 of 2 <br />AdvancedGeo <br />An Employee-Owned Company <br />Dissolved Petroleum Hydrocarbon COG: 528 feet (1/10-mile) in the up- <br />gradient position; 95 feet in the equi-gradient position, and 30 feet in the <br />down-gradient position. <br />Free Product (LNAPL) COG: 528 feet (1/10-mile) in the up-gradient position, <br />165 feet in the equi-gradient position, and 100 feet in the down-gradient <br />position. <br />Are sites located within the AOC? <br />X No <br />Yes <br />Tier 1 screening is complete, and no VEC currently exists, proceed to <br />CONCLUSIONS <br />Proceed to (2) <br /> <br />(2) Subsurface Characteristics <br />Is there a hydraulic (e.g., a river) or physical barrier (e.g., clay barrier) between <br />the SP and the suspected contaminated site (or sites)? Not Applicable <br />Are non-petroleum hydrocarbon COC and dissolved petroleum <br />hydrocarbon or free product (LNAPL) COG known to be in the groundwater <br />beneath the subject property. Not Applicable <br />TIER 2 SCREENING <br />If the Tier 1 screening indicates that a VEC exists, the Tier 2 non-invasive screening can <br />be used to refine screening. Tier 2 applies numeric screening criteria to existing or newly <br />collected soil, soil gas and/or groundwater monitoring results to provide greater certainty <br />to whether or not a VEC exists. The Tier 2 screening involve a Plume Test and Critical <br />Distance Determination. The Critical Distance Determination requires that the edge <br />of the plume be known. The Critical Distance is the lineal distance in any direction <br />between the nearest edge of the contaminated plume and the nearest SP boundary. <br />A Tier 2 Screening was not warranted for the subject property. <br />CONCLUSIONS <br />(1) Conclusions: Impact on Subject Property <br />A VEC exists <br />X A VEC does not exist <br />Buonicore, A.J., 2011, Methodology for Identifying the Area of Concern Around a Property Potentially <br />Impacted by Vapor Migration from Nearby Contaminated Sources, Paper #2011-A-301-AWMA.