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Table 2.1 Environmental Monitoring Overview <br />Centennial Project <br />Weld County Colnrnrln <br /> <br />Sample Type Number of <br />Sampling <br />Points (a) <br />Sampling Frequency <br />Map <br />Groundwater <br />Water Quality (New + Existing) 21 8 events over 5 quarters Plates 1 and 2 <br />Domestic Wells 36 Once <br /> <br />Surface Water <br />Streams 18 When possible Plates 1 and 2 <br />Impoundments 2 Quarterly Plate 1 <br /> <br />Soils Plates 1 and 2 <br />Surface Soils (RAD) 55 Once <br />Soil Profiles 21 Once <br /> <br />Radon Flux 21 Once per season, excluding winter Plates 1 and 2 <br /> <br />Direct Radiation <br />Measurements <br />Plates 1 and 2 <br />Gamma Survey Multiple Once <br />TLDs 10 Quarterly for 12 months <br /> <br />Particulates Plates 1 and 2 <br />High Volume Samplers 5 Continuous with quarterly composite <br />analysis <br />PM 10 2 Every 6 days for 12 months <br />Radon 5 Quarterly for 12 months <br /> <br />Vegetation 53 Three times during growing season Plates 1 and 2 <br /> <br />Animal Tissue 10 Once Plate 2 <br /> <br />Noise 3 Once Plate 1 <br />(a) Samples were collected in accordance with project Standard Operating Procedures <br />(b) Sampling locations are shown in Plates 1 and 2 <br />(c) Samples were also obtained from five additional locations that did not have passive sampling systems (Figure 3) installed <br />April 2009 27 Site Characterization Plan