ARCHIVED REPORTS_XR0007610 - Laserfiche WebLink

Home Browse Search

u , Armour Petroleum Service and Equipment Corporation tank trucks and removed from the site During the removal and over-excavation of the gasoline USTs, the gravel backfill from the former waste oil UST excavation was removed and additional native soil was excavated In addition, the soil beneath the former oil drum storage area was excavated Confirmation soil samples were obtained from these areas (SW-1 , SW-3, SW-6, SW-7, and SW-8) and analyzed for total oil and grease The samples were all reported to contain less than 20 ppm total oil and grease These areas were excavated to a depth of approximately 10 feet bgs 42 REMOVAL OF THE PRODUCT LINES The product Imes between the gasoline USTs and the pump islands were removed and confirmation soil samples (PL-5, PL-6, and PL-7) were obtained along the trench at the locations illustrated in Figure 3 The soil in the product line trenches was also visually inspected and field screened with the PID The field screening indicated that no releases had occurred along the product lines between the gasoline USTs and the pump islands Sample PL-7 was found to contain minor amounts of TPH-G and BTEX. These results as well as the results of samples obtained near by during the preliminary site investigation (samples B-6 at 3 5 feet and B-7 at 3 5 feet and 9 0 feet) indicate that the level and extent of residual hydrocarbons in the soil in the area is minor In addition, the ratio of BTEX component concentrations (relatively low benzene to xylenes concentration ratio) found in sample PL-7 indicate that the gasoline is highly degraded 4 3 REMOVAL AND OVER-EXCAVATION OF THE PUMP ISLANDS Samples obtained from the product line trenches adjacent to the pump islands indicated that a release had occurred in the vicinity of the pump islands Therefore, /"ittelhauser C [ O R A 0 R a T 1 0 1 P2168R006 wp10344) C