Laserfiche WebLink
' Site Background Information West Clay Properties <br /> Page 3 of 6 <br /> 1 <br /> samples collected from the sidewalls and floor of the excavation, it appears that the mayor portion <br />' of the most significantly impacted soil was removed during over-excavation <br /> Ground Water Monitoring- Based on analytical results of ground water samples collected during <br />' quarterly monitoring and site assessment activities, the most impacted ground water appears to be <br /> centered around EW-1 and MW-10 The vertical extent of the contamination plume, as well as the <br /> lateral extent east and south of the former UST cluster, is not well defined <br /> CPT INVESTIGATION <br />' Between 01 and 04 June 2004,four CPT soil borings CPT-0I through CPT-04 and 11 individual) <br /> g � g ) Y <br /> established soil borings for collection of ground water samples were advanced at the southern UST <br />' No 3 location and the northern UST cluster area CPT soil borings were advanced at the following <br /> locations- ground water samples were collected from dedicated borings at the following intervals <br />' CPT-01, CPT-02 and associated ground water sampling borings were advanced near the <br /> northern boundary of the former UST No 3 location (Figures 2 and 3) to determine the <br />' vertical extent ofpetroleum hydrocarbon-impacted ground water CPT-01 and CPT-02 were <br /> co-located borings CPT-01 was advanced to approximately 100 feet bsg, CPT-02 was <br /> advanced to approximately 170 feet bsg- CPT-01 was sampled between 77 and 81 feet bsg <br />' and between 93 5 and 97 5 feet bsg while later CPT-02 was sampled between 114 and 118 <br /> feet bsg and between 137 and 141 feet bsg, <br /> C CPT-03 and associated ground water sampling bonngs were advanced south-southwest of <br />' the former UST No 3 location to determine the down-gradient extent of petroleum <br /> hydrocarbon-impacted groundwater CPT-03 was advanced to approximately 210 feet bsg <br /> -CPT-03 was sampled between 50 and 54 feet bsg, 74 and 78 feet bsg, 133 and 137 feet bsg <br />' and 176 and 180 feet bsg, <br /> • CPT-04 and associated ground water sampling borings were advanced north of the former <br />' UST cluster excavation (Figures 2 and 4) to determine the vertical extent of petroleum <br /> hydrocarbon-impacted ground water at the former UST cluster area CPT-03 was advanced <br /> to approximately 175 feet bsg <br />' • Ground water sampling boring CHB-0I was advanced approximately 70 feet east-northeast <br /> of CPT-04 to determine the vertical extent ofpetroleum hydrocarbon-impacted ground water <br />' down-gradient of the former UST cluster area-CPT-04 was sampled between 80 and 84 feet <br /> bsg and 166 and 170 feet bsg, while - soil boring CHB-01 was sampled between 78 and 82 <br /> feet bsg <br /> • STRATIGRAPHY <br /> Advanced GeoEnvironmental,Inc <br /> I <br />