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5.0 Environmental Setting 5.3 Cultural/Historical Resources <br />Avion Project SEIR <br />Page 5.3-5 <br />all seven resources is provided below. Complete descriptions of each resource are presented in <br />Appendix C. <br />Isolates <br />7178-RDS-1 is a prehistoric isolate consisting of two secondary flakes. One flake was of fine-grained <br />porphyritic metavolcanic material and the other was of medium-grained metavolcanic material. <br />7178-RDS-2 is a prehistoric isolate consisting of a single white quartz secondary flake near the <br />mapped location of CA-SDI-18428. <br />7178-HJP-1 is a prehistoric isolate consisting of a single white quartz secondary flake located during <br />the 2013 survey near the mapped location of CA-SDI-18428. <br />Other Sites <br />7178-RDS-3 is a prehistoric site found during the 2013 survey consisting of three secondary flakes in <br />an area of approximately 6 square meters. No material was relocated in the mapped location of <br />RDS-3 during the 2017 survey. However, seven flakes were found close enough to CA-SDI-18428 <br />during the 2017 survey to be included in an expanded boundary for that site. The area of RDS-3 has <br />also been included in the expanded boundary of CA-SDI-18428. <br />7178-HJP-2 is a prehistoric site located during the 2013 survey. It consists of two secondary flakes <br />and a single piece of shatter. All are fine-grained porphyritic metavolcanic material. Only one flake <br />was relocated during the 2017 survey. <br />7178-HJP-3 is a homestead site located during the 2013 survey in the northeastern corner of the <br />project. The existing components consist of two concrete slabs, a wall, an asphalt pad with <br />associated fieldstone wall, a steel tank, and a fenced-in area. There is no foundation at the house <br />site, as determined from aerial photographs. There is an asphalt pad immediately to the north and a <br />low fieldstone wall and concrete walkway on the east side. It is possible the house sat on preformed <br />concrete masonry piers that have been moved during or after the house was demolished in the <br />early 2000s. <br />7178-RDS-4 is a historic site consisting of two buildings and an associated dirt road found during the <br />2013 survey. The main building and a small storage shed are built on a graded pad that cuts into the <br />slope. The second building is a 10-foot-by-7-foot wood-framed storage shed with a shallow pitch <br />gable roof. The associated dirt road runs along the west-facing slope on the eastern side of the <br />project. The road is 10 to 15 feet wide and is cut into the slope.