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City of Ramsey <br /> Project 61700969 <br /> March XX,2017 <br /> Page 7 <br /> DRAFT <br /> E.2.a. Temporary Monitoring Wells <br /> After the soil borings were advanced about 2 feet into the water table,temporary monitoring wells were <br /> constructed using 1-inch-diameter PVC riser and a 5-foot long, 10-slot screens. Following well use,the <br /> well materials were removed,and the boreholes were sealed in accordance with applicable code <br /> requirements. <br /> E.2.b. Groundwater Analyses <br /> Groundwater samples collected from the temporary wells were submitted to Pace Analytical Services of <br /> Minneapolis, Minnesota and analyzed for the following parameters: <br /> ■ VOCs using EPA Method 8260 <br /> ■ DRO using the WDNR Method <br /> E.3. Soil Vapor Evaluation <br /> E.3.a. Soil Vapor Probes <br /> Three temporary soil vapor probes(SG-1 through SG-3)were advanced, using a hydraulically-driven <br /> push-probe rig,to a depth of 5 feet bgs and then retracted to a depth of 4 feet bgs. New,inert tubing <br /> was attached to the top of the downhole sampler,and the sampling point and tubing were purged with a <br /> hand pump to remove two volumes of air prior to sample collection. Following purging, organic vapor <br /> concentrations were screened with a PID and the value was recorded.The soil vapor samples were then <br /> collected using laboratory-supplied negative pressure air-sample collection canisters (6-liter canisters) <br /> equipped with 200 milliliter per minute (mL/min)flow restrictors in accordance with the MPCA <br /> guidelines. Following sample collection,the temporary sampling point was removed from the borehole, <br /> and the borehole was sealed in accordance with MDH guidelines. <br /> The soil vapor samples were submitted to Pace Analytical Services of Minneapolis, Minnesota and <br /> analyzed for VOCs using EPA Method TO-15. <br /> BRAUN <br /> INTERTEC <br />