Laserfiche WebLink
Preservation of Soil Samples <br /> After field screening, the sample sleeve ends were sealed with <br /> aluminum foil and further protected with plastic caps The <br /> samples were labeled with ID#, location, depth, date, time, <br /> sampler' s initials, and analyses to be performed, then placed in <br /> an ice chest at 4 degrees C and delivered with accompanying chain <br /> of custody documentation to a California State certified <br /> analytical laboratory <br /> Selection and Certified Laboratory Analyses of Soil Samples <br /> Two soil samples per boring were selected for certified <br /> laboratory analysis, based on the results of field screening <br /> The samples selected for analysis where - the sample from <br /> approximately 12 feet bgs, the depth were gasoline odor was first <br /> encountered, and the sample from the base of the boring, (see <br /> Table 1) The selected soil samples and the water samples were <br /> analyzed by Sparger Technology, Inc , a state certified <br /> laboratory, DOH# 1614 , for concentrations of Total Petroleum <br /> Hydrocarbons as Gasoline (TPHg) using EPA method 8015 modified, <br /> 5030 extraction, and Benzene, Toluene, Ethylbenzene, and Xylenes <br /> (BTEX) using EPA method 8020 <br /> Destruction of Confirmation Soil Borings <br /> The soil borings were destroyed on the same day that they were <br /> drilled The borings will be backfilled from total depth to <br /> within one foot of the surface with neat cement . The surface <br /> portion of the holes were plugged with concrete, then leveled to <br /> grade <br /> DISPOSAL OF CUTTINGS AND WASTE WATER <br /> The augering of the three soil borings generated approximately a <br /> quarter of a yard of soil cuttings This soil is being <br /> temporarily stored on-site The soil cuttings were placed on and <br /> covered with 6 mil visqueen A composite soil sample will be <br /> collected from the soil pile and analyzed for concentrations of <br /> TPHg and BTEX With receipt of soil results, the San Joaquin <br /> Valley Air Quality Control Board will be contacted for permission <br /> to aerate the soil . After the soil has been aerated, it should <br /> be retested to determine its final deposition. <br /> The waste water generated from the cleaning of augers and <br /> sampling equipment during the drilling operations was <br /> containerized in a 20 gallon DOT drum <br /> 3 <br />