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Groundwater samples were collected from the seven monitoring wells using dedicated Teflon <br />bailers. Unfiltered groundwater samples were placed directly into sample bottles. A duplicate <br />groundwater sample was collected at monitoring well MW-6. Groundwater samples were placed <br />into coolers chilled with ice and shipped via Federal Express to the Sevem Trent Laboratories, <br />Inc. (STL) facility located in Denver, CO under industry standazd chain-of-custody procedures. <br />A temperature blank was included in each cooler to verify that samples were maintained at an <br />appropriate temperature. All groundwater samples were submitted for analysis of metals (azsenic, <br />antimony, barium, beryllium, cadmium, chromium, lead, mercury, nickel, selenium, silver <br />thallium, aluminum, iron, manganese, magnesium potassium, sodium, and calcium), pH, specific <br />conductance, total dissolved solids (TDS), chloride, sulfate, alkalinity, cazbonate, fluoride, <br />ammonia, and nitrate. In addition, temperature, pH, and conductivity were measured in the field <br />for groundwater samples collected from each monitoring well. <br />2.3 Field Observations <br />Observations of groundwater color, odor, and particulate content were noted in the field notebook <br />for groundwater samples collected at each monitoring well. Groundwater samples collected at <br />monitoring wells MW-6, MW-8, MW-9, and MW-10 were cleaz and had no discernable odor. <br />The groundwater sample collected at monitoring well MW-7 was cleaz but a hydrogen sulfide- <br />type smell was noted. Groundwater samples collected at monitoring wells MW-11 and MW-12 <br />were slightly cloudy and light brown in color, but had no discernable odor. <br />' Using the purging methods described in the previous section, monitoring wells MW-6, MW-7, <br />MW-11, and MW-12 were not purged dry and three casing volumes of groundwater were <br />removed. Monitoring wells MW-8, MW-9, and MW-10 were purged dry and were allowed to <br />'~ recover to pre-purging groundwater levels prior to sampling. <br />7:\Holcim\GW Monitoring Report\94332186.doc 2-2 <br />