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VV Mr. Ron Rowe March 6, 2000 Page Four SOIL ASSESSMENT Four soil borings will be placed at the site utilizing a direct push drill rig. Prior to drilling, Underground Service Alert will be notified. One boring will be placed adjacent to the former tank excavation. The remaining borings will be; placed within fifteen feet of the former UST excavation. Two borings will be placed downgradient to the former tank excavation and one boring will be placed upgradient, based on surface topography. The location of the borings is illustrated in Figure 2. The soil borings will be advanced until the vertical extent' of soil contamination is determined or five feet beyond the first encounter of saturated soils. Soil samples will be collected continuously throughout thei boring. Soil samples will be obtained from the boring using either a 1.5 inch inside diameter(I;D), 45 inch long, nickel plated core barrel sampler or a 1.25 inch ID, 24 inch long sampler attached to the end of the boring rods. Soil samples will be collected by pushing the barrel sampler through the desired sampling depth with the direct push drill rig. The sampler will be recovered with a section of undisturbed soil collected within the acetate liner inside the core barrel. Soil lithol'ogy will be recorded in the field and each sample will be inspected for evidence of staining, odors and other signs of contamination. Soil samples will be collected in duplicate. One sample duplicate will be subjected to head space analysis in the field utilizing an organic vapor monitor (OVM) and the remaining duplicate will be placed in laboratory supplied containers and on ice pending possible laboratory analysis. Up'to two soil samples per boring will be submitted for chemical analysis. In borings with no measurable OVM readings or other indication of contamination; one soil sample will be collected just above the water table or the termination depth of the boring. In borings with measurable OVM readings or other indication of contamination, one soil sample will be collected from the interval°having the highest OVM and one soil sample will be collected just above the water table or the termination depth of the boring. Soil samples will be sent via over-night courier to a certified laboratory for chemical analyses. Soil samples will be subjected to analysis of total petroleum hydrocarbons -gasoline range (TPH- G 801518020); total petroleum hydrocarbons -diesel range (TPH-D 8015); and benzene, toluene, ethylbenzene, and xylene (BTEX 801518020)'. SENSITIVE RECEPTOR SURVEY Kleenco will initiate a search of available public records to determine the location of potable water wells located within 2000 feet of the subject site. Additionally, Kleenco will review the applicable U.S.G.S. topographic quadrangle, city plat maps, and conduct a visual survey to determine the location of potential sensitive receptors. REPORTING Upon completion of the field work and chemical analyses, a report will be prepared for submittal to the San Joaquin County Environmental Health. The report will document methods used in the field, the results of the field work, groundwater elevations and direction of flow, and a discussion of the findings. The report will also include supporting documentation including site maps, geologist logs, and analytical laboratory reports. 00268114.919