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TABLE 1 <br /> SUMMARY OF SOIL SAMPLE RESULTS <br /> (Page 1 of 2) <br />PROJECT NAME: Aggregate Industries F Street Gravel Pit <br />PROJECT LOCATION: 4509 F Street, Greeley, Colorado <br />PROJECT NUMBER: 1001018 <br /> Approximate <br />Sample <br />Name <br />Assessment Sam les Sample <br />Date Sample Depth <br />(feet below grade) Benzene <br />(µg/Kg) Toluene <br />(µg/gg) Ethylbenzene <br />(µg/gg) Xylenes <br />(µi~g) TEPH <br />(mgt ) <br />North Wall East End 05/29/01 11 to 12 <2. <2. <2. <2. <10. <br />North Wall West End 05/29/01 11 to 12 <2. <2. <2. <2. <10. <br />West Wall North End <br />West Wall North End <br />South Wall <br />Bottom <br />West Wall <br />Southeast Corner <br />~- Northeast Corner 05/29/01 <br />12/11/06 <br />10/08/07 <br />10/08/07 <br />10/08/07 <br />10/08/07 <br />10/08/07 11 to 12 <br />11 to 13 <br />12 to 13 <br />14 to 15 <br />13 to 14 ~ <br />12 to 13 <br />12.to 13 <2. <br /><2. <br />Q. <br /><2. <br /><2. <br /><2. <br /><2. 2,422. <br />3.5 <br /><2. <br /><2. <br /><2. <br /><2. <br /><2. 7,250. <br />1,550. <br /><2. <br /><2. <br /><2. <br /><2. <br /><2. 11,789. <br />45. <br /><2. <br /><2. <br /><2. <br /><2. <br /><2. 4,399. <br />1,900. <br /><10. <br /><10. <br /><10. <br /><10. <br /><10. <br />Bottom #1 <br />Bottom 05/29/01 <br />12/11/06 13 to 15 <br />13 to 15 <2. <br /><2. 307. <br /><2. 1,067. <br />47. 1,868. <br />3.9 .2,440. <br />191. <br />West Wall South End 05/31/01 11 to 12 <2. <2. <2. <2, <10. <br />South Wall West End 05/31/01 11 to 12 <2. <2. <2. 7. 371. <br />South Wall Middle <br />South Wall Middle 05/31/01 <br />12/11/06 11 to 12 <br />10 to 12 <2. <br /><2. <2. <br /><2. 606. <br /><2. 1,153. <br /><2. 3,273. <br /><10. <br />Tier 1 RBSLs/TPH Threshold 260. 140,000. 190,000. 260,000. 500. <br />Notes: <br />1) Approximate sample locations are shown on Figure 3. <br />2) TEPH =Total Extractable Petroleum Hydrocarbons. <br />3) µg/Kg =micrograms per kilogram. <br />4) mg/Kg =milligrams per kilogram. <br />5) Tier 1 RBSLs =Tier 1 Risk-Based Screening Levels for the Leachate to Groundwater Ingestion exposure pathway as taken from Table 5.1 in the Storage Tank Regulations (7CCR 1101-14). <br />6) Bold indicates an exceedance of the TPH Threshold. <br />7) < =Less than the laboratory detection limit. <br />8) The Bottom #1 soil sample was collected from beneath the groundwater table and the sample was lifted through apparently impacted groundwater. <br />PnRnGON <br />