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Pombo Ranch Facility April 24,2005 <br /> Remedial Excavation&Source Removal <br /> close proximity to the fuel storage area. Borings B-2, 3, & 4 were drilled around the <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 /> Sam ie I.D. TEPH Gas Benzene Toluene E-Benzene Xylenes MTBE 8260 Pest. 601 <br /> B-1-10' ND <br /> ' B-1-15' ND ND ND ND ND ND ND <br /> 13-1-17'1120 ND ND ND ND ND ND - *2. . ND <br /> B-2-10' ND ND ND ND ND ND ND <br /> ' B-2-15'H20 ND ND ND ND ND ND ND ND <br /> .;, ' a 1Qesel ND ND ND ND ND ND <br /> - 0 ND 0 05WHOIffT_%FQAa,130 <br /> OHS® Nn �s'sNMEM 2p o 0 0o iao <br /> 1 <br /> B-4-1 0ND ND ND ND ND ND ND <br /> .6x T, " <br /> ' f 4 A49 ND 6 ** 9 T ND <br /> B r5�1°0' e ND ND 4$ 00 ND <br /> .�. <br /> B-5-15' ND ND ND ND ND ND ND <br /> 13 5 1'7'HZO .. 100ldiesel °�;;Q1$5�'°� ND "TQV 5 3 13,x"; " ND ND <br /> B-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 15P'Hz0„ 1 Smitoroil ND ND ND ND ND ND ND <br /> 1 B-8-17'H20 1 iND <br /> Note: ND=Non Detect Blank Space=Not Analyzed <br /> Gasoline&Diesel Reported as mg/Kg(or mg/L for water); <br /> ' BTEX&Oxygenates Reported as gg/Kg(or gglL for water) <br /> *not confirmed by method 8260 * *confirmed for MTBE by method 8260 <br /> Additional soil borings with the Geoprobe®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 /> rvarious 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 />' 2 <br />