ARCHIVED REPORTS_XR0009297 - Laserfiche WebLink

Home Browse Search

I ' 15 August 1997 AGE-NC Project No 96-0254 IPage 2 of 7 Concentrations of TPH-g and BTE&X were detected in each soil sample collected from the tank excavation EDB was detected in one sample at a concentration of 2 9 milligrams per kilogram mg/kg (parts per million ppm) TPH-g and BTE&X were detected in the NA ater sample at concentrations of 150 000, 25,000, 43,000, 5,700 and 32,000 micrograms per liter gg/L (parts per billion ppb), respectively Lead was Idetected at a concentration of 0 67 ppm in the water sample, however, EDB was not detected 2 3 REGIONAL GROUND WATER ELEVATION Information obtained from monitoring wells located at 2420 Grant Line Road indicates that Igroundwater depth at the site occurs between 8 and 10 feet bsg The ground water now direction at the Grant Line site is northerly, consistent with flow direction in the I racy area 3 0. PROCEDURES 3 1 PROBING AND SAMPLING On 24 June 1997, a total of nine soil probe borings (B 1 through B9)were advanced at the site, under the observation of the PHS-EHD Probe borings were advanced in the area of the former USTs and north to the property line Probe borings B 1, B2 and B3 were advanced to depths of 15, 20 and 16 Ifeet bsg, respectively All other soil probe borings were advanced to a depth of 12 feet bsg Locations of the soil probe borings are illustrated on Figure 2 - IProbe borings B I through'135 were continuously sampled (cored), soil in probe boring B6 was sampled at the vadose zone/ground water interface B1 through B6 weie also sampled for ground Iwater Probe borings B7, B8 and B9 were sampled only for ground water During advancement of probe borings B I through B5, soil was collected using a Geoprobe macro I soil sampling assembly and a 4-foot Teflon sleeve, beginning at 4 feet bsg and continuing to total depth After collection, the ends of a 6-inch portion the sleeve were covered with Teflon sheets, capped and sealed with tape Probe boring B6 was sampled using a Geoprobe soil sampling device loaded with four six-inch by 1 125 inch brass sleeves The soil sample was advanced to seven feet and soil was collected The second sleeve, collected from a depth of approximately eight feet, was covered with Teflon sheets, capped and sealed with tape All samples were labeled uniquely ICollected samples preserved for laboratory analysis were laced in a chilled container, under ice . rY Y p , and transported to McCampbell Analytical, Inc , (MAI) under chain-of-custody The sampling Aih,anced GcoEnvironmentsl Inc - f