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In addition,some sample locations on Yule Creek may require an alternate route of access due to snow <br /> accumulation or water levels. This may require access through private property, which will be <br /> dependent on landowner authorization. <br /> To access the sample locations during the winter months, sampling personnel may utilize some of,but <br /> not limited to, the following equipment in additional to their regular required PPE to ensure safe <br /> sampling procedures are being followed: <br /> • Snowshoes <br /> • Avalanche location beacon <br /> • Microspike footwear traction <br /> • Ladder/Tether <br /> • Snowmobile/Snow Machine <br /> If snowpack volumes accumulate to the point where Yule Creek is inaccessible,notice will be provided <br /> to the DRMS and sampling will cease until access can be re-evaluated and deemed safe for personnel <br /> to resume sampling activities. <br /> DG 5 is located within an avalanche zone and will only be sampled if detections at DG 3 and DG 4 <br /> indicate a hydrocarbon presence exceeding regulatory thresholds. <br /> B. Summer Sampling Schedule <br /> During the summer and early fall months, or when normal access is feasible, samples from the <br /> following locations will occur monthly: <br /> • UG I <br /> • DG 3 <br /> • DG 4 <br /> • Confluence <br /> Equipment used to access the sample locations may consist of, but not be limited to,the following: <br /> • Waterproof/resistant clothing& PPE <br /> • Microspike footwear traction <br /> • Ladder/Tether <br /> C. Quarterly/Contingent Sampling <br /> CG, DG I and DG 2 will be sampled quarterly to monitor water quality parameters on Yule Creek <br /> upgradient from the sump. If analytical results indicate that water quality parameters have changed <br /> and diesel related contaminants are detected at DG 3. sample locations (CG, DG 1, DG 2) will be <br /> included in the monthly sampling and monitoring to evaluate potential lateral movement of <br /> hydrocarbon impacts <br /> DG 5 is an additional sample location which will be sampled contingent on the water quality <br /> parameters at DG 3 and DG 4. If contaminants of concern(COC's)are detected in DG 3 and DG 4 at <br /> 3 <br />