Laserfiche WebLink
1 Pombo Ranch Facility <br /> May 2006 <br /> Site Closure Report <br /> 1 <br /> • above ground fueling area with boring B-3 located at the location of the former <br /> ' underground tank excavation. Boring B-5 was also drilled in the area of a previously <br /> removed underground fuel tank. Boring B-6 was drilled in the Truck and Tractor wash <br /> area and sampled for pesticides and petroleum compounds. Boring B-7 was drilled in a <br /> location where above ground fuel was stored and used historically. Boring B-8 was <br /> drilled in front of the barn at 24124 Lammers Road where refrigeration equipment is <br /> dismantled. Since there was no apparent spillage or dumping of refrigerants, only <br /> ' groundwater was sampled and analyzed. <br /> Soil and Groundwater Labora ory Sample Results (September 16, 1998) <br /> Sample I.D. TEPH Gas Benzene Toluene E-Benzene I Xylenes MTBE 8260 Pest. 601 <br /> B-1-10' ND <br /> 8-1-15' ND ND ND ND ND ND ND <br /> ' B-1-17'H20 ND ND ND ND ND ND *2.7 ND <br /> 13-2-10' ND ND ND ND ND ND ND <br /> 13-2-15'H20 ND ND ND ND ND ND ND ND <br /> ' B-3-5' 140 diesel ND ND ND ND ND ND <br /> 13-3-10' ND 480 1.000 3000 9200 26000 *2300 <br /> B-3-15'H20 ND 56 3700 1200 2400 4000 **3400 1900 <br /> B-4-10' ND ND ND ND ND ND ND <br /> ' B-4-15'H20 2.1 motor oil 0.09 7.1 ND 6.9 11 **7.9 ND <br /> B-5-10' ND 42 ND 48 I50 310 ND <br /> 13-5-15' ND ND ND ND ND ND ND <br /> ' • B-5-17'H20 100 diesel 0.5 ND 0.9 5.3 13 ND ND <br /> 13-6-5' ND ND ND ND ND ND ND ND <br /> B-6-10' ND ND ND ND ND ND ND <br /> ' B-6-15'H20 ND ND ND ND ND ND ND ND ND <br /> B-7-10' ND ND ND ND ND ND ND <br /> B-7-15'H20 1 1.5 motor oil ND ND ND ND ND ND ND <br /> 13-8-17'1120 1 i iND <br /> Now ND=Non Detect Blank Space=Not Analyzed <br /> Gasoline&Diesel Reported as mg/Kg(or mg/L for water); <br /> BTEX&Oxygenates Reported asµg/Kg(orµg/L for water) <br /> ' *not confirmed by method 8260 * *confirmed for MTBE by method 8260 <br /> Additional soil borings with the Geoprobc® were suggested for the areas indicated on the <br /> ' Figure 4 Proposed Boring Location Map included in our October report. San Joaquin <br /> County Environmental Health has since indicated in their letter dated December 8, 1998 <br /> that no further assessment of the tank area B-5 will be required. They did require the <br /> vertical and lateral definition of the contamination plume in the area of B-3 and a <br /> minimum of three monitoring wells. A well survey that shows the location of all <br /> agricultural, industrial, domestic, municipal and other wells located within a 2000-foot <br /> radius of the site was also requested. <br /> On July 6, 1999 M.J. Kloberdanz & Associates drilled 4 Geoprobe® soil borings to <br /> ' various depths to determine both the lateral and vertical extent of soil contamination. <br /> Boring B-9 was drilled adjacent to boring B-3, drilled in 1998, in order to obtain a <br /> vertical limit of the soil contamination. Laboratory soil samples were collected every <br /> ' five feet from 15 feet below grade surface to 30 feet below grade surface. Water was <br /> 2 <br />