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SANCHEZ PROPERTY AarncedGeo <br /> e-Owned Company <br /> 29 January 2021 .,., <br /> Page 2 of 3 <br /> (1b) If groundwater flow direction is known, the AOC for non-petroleum hydrocarbon <br /> COC and dissolved petroleum hydrocarbon or free product (LNAPL) COC is: <br /> • Non-Petroleum Hydrocarbon COC: 1,760 feet (1/3-mile) in the up-gradient <br /> position, 365 feet in the equi-gradient position, and 100 feet in the down- <br /> gradient position. <br /> • Dissolved Petroleum Hydrocarbon COC: 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) COC: 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 Tier 1 screening is complete, and no VEC currently exists, proceed to <br /> CONCLUSIONS <br /> Yes Proceed to (2) <br /> (2) Subsurface Characteristics <br /> (2a) 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 /> (2b) Are non-petroleum hydrocarbon COC and dissolved petroleum <br /> hydrocarbon or free product (LNAPL) COC known to be in the groundwater <br /> beneath the subject property. Not Applicable <br />