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Water and Natural Gas Line Route Geotechnical Investigation (MR12 -12) <br />A site geotechnical investigation is required to support evaluation, design, and possible future <br />construction of a water and gas line route terminating at the Wadge Impoundment. A total of <br />four (4) holes will be drilled at a spacing of 1000' along the route within the permit <br />boundary. The approximate locations of the holes can be found on the Reference Map along <br />with appropriate cultural resources survey locations. Holes will be drilled in either <br />previously disturbed areas or areas that have had cultural resource investigations as shown on <br />the Reference Map. <br />The site geotechnical investigations will provide information pertaining to soil and rock <br />characteristics along the route. This will give a better understanding of the project scope and <br />costs involved. <br />An all- terrain drill rig will be used to complete sample holes to characterize rock and soil <br />materials present along the water and gas lines route. All auger -holes will be backfilled with <br />cuttings, leveled, and, if necessary, hand - seeded with the approved rangeland seed mixture <br />upon completion of drilling and sampling. The holes will be approximately 6" in diameter <br />and no deeper than 7 feet. <br />Geologic Mapping and Sampling of Marine Shale (MR21 -13) <br />PSCM received a notice of violation (NOV) and an order to cease and desist non - compliant <br />discharge from the Water Quality Control Division on September 12, 2012 for alleged <br />excursions of the selenium limits from discharges occurring in 2011 and 2012. As part of the <br />requirements to address the NOV, PSCM committed to geologic field sampling and mapping <br />of marine shale outcrops within the watersheds and tributaries upstream of ponds 002 and <br />004. <br />An all- terrain vehicle mounted drill rig will be required to drill 2" diameter holes to extract <br />material for sampling at up to 14 sites. Material samples (both soil samples and rock <br />cuttings) will be collected for lab testing from depths of 1 and 2 feet, and at 2 -foot intervals <br />from 2 to 10 feet. A PSCM field technician will accompany the rig to collect and process <br />samples at the specified locations. All auger -holes will be backfilled, leveled, and, if <br />necessary, hand - seeded with the approved rangeland seed mixture upon completion of <br />drilling and sampling. All sites are located on either previously disturbed areas or areas that <br />have undergone archaeological investigations (see site map). <br />MR21 -13 2.05.3 -E5 - 3 0813 <br />