Laserfiche WebLink
' <br /> A soil sample was collected from each boring in a clean stainless steel tube contained in <br /> ' a split spoon sampler driven into undisturbed soil at the specified sample depth. The <br /> tubes were recovered from the sampling device,sealed with teflon sheets and plastic end <br /> caps, taped, labeled, and placed into a chilled ice chest. All "in ground" drilling <br /> ' equipment and sampling apparatus were decontaminated after the first boring was <br /> completed and before the second boring was initiated. <br /> The borings were backfilled by replacing and compacting the auger cuttings, and then <br /> sealing the boring with a concrete cap to match the existing pavement. Mr.Harlin Knoll <br /> from the San Joaquin County Environmental Health Department was present to observe <br /> ' the work. <br /> The samples were transported to a State of California approved analytical laboratory <br /> under chain of custody immediately after collection. The samples were received by <br /> Sequoia Analytical Laboratories at 11:50 A.M.on April 6,2005. <br /> ' Both samples were analyzed for Lead by U.S.E.P.A. 6000/7000 Series Methods, and <br /> Gasoline\BTEX\Oxygenates by U.S.E.P.A. Test Method 8260B. The results of the <br /> analyses are presented in the following table: <br /> TABLE 1:LABORATORY ANALYTICAL RESULTS <br /> ' SAMPLE I.D. LEAD GASOLINE BETX OXYGENATES <br /> Schmidt B-1-A 3.51 mg/kg N/D N/D N/D <br /> ' Schmidt B-2-A 3.55 mg/kg N/D N/D N/D <br /> ' The laboratory analytical report in its entirety can be found in the appendices of this <br /> report. <br /> 1 SITE LITHOLOGY: <br /> The soils encountered in boring B-1 were comprised of brown silty sands except for when <br /> the boring penetrated and extended through the backfill materials surrounding the tank. <br /> The backfill was comprised of clean"pea gravel'. The boring was terminated, and the <br /> ' sample collected in brown silty sands. <br /> Boring B-2 was advanced through tan and buff colored sandy silts to a point that the <br /> ' backfill materials surrounding the tank were encountered and penetrated. The backfill <br /> material was comprised of clean "pea gravel' similar to that encountered in B-1. The <br /> boring extended through the backfill material,and was terminated by collecting a sample <br /> in a buff colored sandy silt. <br /> RNC Environmental,LLC • 9746 Parktree Way,Elk Grove,CA 95624 • 916.714.3073 • fax 916.290.0106 <br />