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foot long (three-foot long for the limited-access rig) by 1.25-inch diameter hollow rods with the inner <br />rods in place. At approximately one foot above the desired sampling depth, an inner rod was removed <br />and the sampler was advanced to the desired sampling depth to allow undisturbed soil to enter the <br />sampling liner. The sampler will be retrieved from the subsurface and the soil-filled liner will be <br />removed. <br />Each acetate liner will be cut using a hacksaw or pipe-cutter. The liner will be capped on either end <br />with Teflon tape and plastic caps. The capped liners and VOA vials will be labeled for identification and <br />stored in an iced cooler. The soil in the liner will be visually inspected for discoloration, monitored for <br />odors, classified in accordance with the Unified Soil Classification System (USCS), placed in a sealable <br />plastic bag, and field-screened with a photoionization detector (PID). <br />After completing soil sampling to the terminal depth, a temporary monitoring well will be installed <br />within the drill rods by advancing the sampler fitted with an expendable steel point to the terminal <br />depth and retracting the rods to expose a steel well screen. <br />Groundwater samples will be retrieved from each temporary monitoring well using a new section of <br />3/8-inch diameter polyethylene tubing with a check valve at the terminal end and conveyed into three <br />hydrochloric acid-preserved VOA vials. Each vial will be filled with no observable headspace or air <br />bubbles to minimize the potential for volatilization, labeled for identification, and stored in an iced <br />cooler. <br />The temporary monitoring wells will be removed from the boreholes and each boring will be backfilled <br />with neat cement grout and capped with concrete or asphalt patch to match surrounding ground cover <br />after of sampling. <br />Field-screen each soil sample using a photoionization detector (PID); <br />Prepare up to 20 soil samples and five groundwater samples for laboratory analysis; <br />Based on field-screening results, analyze one soil sample per boring (five soil samples total) and each <br />groundwater sample (five groundwater samples total) for carbon chain total petroleum hydrocarbons <br />(TPH-cc) in accordance with EPA Method 8015 and for VOCs (including naphthalene) in accordance <br />with EPA Method 8260; and <br />Prepare a report detailing field activities, methods, and findings. <br />Signatures of Environmental Professionals <br />If you have any questions, please do not hesitate to contact Gary Reynolds at (970) 568-2596. <br />Sincerely, <br />Brett Bova <br />Staff Scientist <br />Jo Mangine, PG <br />P ject Manager <br /> <br />Ga eynolds <br />Principal <br />