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1 <br />4.2.2 Surface Water Samples <br />Water samples were collected from the Eagle river at locations upstream and downstream of the <br />facility. The distance from the gravel pit to the upstream sampling location was 185 feet. The <br />distance to the downstream sampling location was 553 feet. The upstream water sample was <br />' identified as SW-upgradient and the downstream water sample was identified as S W-downgradient. <br />Locations of the surface water samples aze shown in Figure 3. <br />' 4.2.3 Groundwater sample <br />A backhoe was used to dig a pit 5 feet below ground surface. The excavated pit exposed the water <br />' table at 3.5 feet below ground surface. The pit was located in the flood plain azea of the Eagle river <br />and down-gradient of the original location where the weed killer was released. A groundwater <br />sample was taken from the pit and referenced as GW-Well. <br />4.2.4 Numbering Protocol <br />' A total of 19 hand augers were performed and numbered sequentially from HA-1 to HA-19 in a <br />counterclockwise direction azound the Rock Pile. The soil samples were identified as S#, where # <br />' was the distance from the starting point referenced as S0. For example, S45 is the sample taken at <br />45 feet of the first sample location as shown in Figure 2. <br />' 4.2.5 Decontamination <br />Hand augers and small equipment used for soil sampling were cleaned between samples with <br />' Alconox detergent and triple rinsed with potable water. Decontamination of the back-hoe was <br />accomplished by steam cleaning before and after excavating the pit. <br />t 4.3 Sampling Program <br />4.3.1 Soil Sampling <br />' Soil Samples were collected from the hand auger at zones of highest PID reading and of suspected <br />impact. The sampler wore a new pair of disposable latex gloves for each sample collected. Soil <br />samples from hand-angered borings retained for chemical analysis were placed in clean glass <br />containers provided by laboratory. Each container was completely filled to minimize voids. After <br />' sample collection, the samples were immediately properly labeled, stored for shipment and cooled <br />to approximately 4 °C. Upon completion ofthe soil sampling, achain-of-custody log was initiated. <br />Chain-of-custody forms aze included in the Appendix. <br />Environmental Site Investigation Montgomery Pit <br />' Techlink Environmental, Inc. 7 B&B Excavating <br />