Laserfiche WebLink
s } <br /> AGS Job No. 038032-] $ AGS Job NO- 438032-1 <br /> May 18, 1988 May 18, 1988 <br /> UNOCAL Station ro. 6981, Stockton, California y o. 6981, Stockton, California <br /> UNOCAL Station N <br /> o Use an organic vapor analyzer (OVA) for a semi- sample S-S-Line9. Adjacent areas showing <br /> quantitative evaluation of the relative amounts of vicinity of soil p <br /> hydrocarbon contamination within the soil. hydrocarbon concentrations will be removed <br /> � laboratory detected <br /> o Collect soil samples in areas previously showing further <br /> hydrocarbons of until field evidence i,,;;zcates no hydrocarbon contamination <br /> r�.etectab7.e amounts of y <br /> excavation has been completed and it is believed that <br /> na further soil contamination exists either laterally exists. <br /> or vertically. <br /> A geologistG from <br /> Applied Geosystems will be present at the site <br /> o Analyze selected soil. samples for gasoline product collect soil samples from the bottom of the excavation <br /> constituents in a labaratory certified by the State of to <br /> California. ro riate, and to evaluate the <br /> a to evaluate the cavities and sidewalls if app P Sail with <br /> a Interpret field and laboratory dat alitatively• <br /> outcome of the excavation. relative degree of soil contamination <br /> an a ro riate E� evidence of contamination will be excavated and stocY.piled on <br /> a Backfill the excavati�,n cavities with PP p <br /> clean material. <br /> S <br /> o Prepare a letter report summarizing our findings <br /> W"_n� <br /> tion <br /> conclusions and recommendations. the base the excavation <br /> - les will be collected from e <br /> of c by <br /> Samp percussion sampler <br /> FIELD WORK AND METHODS + excavating with a backhoe. <br /> A hand-operated <br /> . <br /> used to drive a clean brass sample sleeve into the soil <br /> will be The sleeve will <br /> Applied GeoS;�stems. proposes excavating contaminated soil in the inunediately <br /> after it is brought to the surface. <br /> _ d S-4-Line 3. This removed from the sampler and sealed with aluminum foil, baled <br /> vicinity of prev samples S 4-Line2 an be r <br /> successfully ac t� e, The sample will then be a <br /> excavation is expected to be su y plastic caps and airtight tap given a <br /> les will be <br /> s e. The same- <br /> excavating approximately 10 feet below grade. According to and placed in iced storage <br /> aminated soil with ation which will <br /> identify its location and depth. <br /> previous Applied GeoSystems field work, cont design. <br /> approximately the same field concentrations cleared up les within the excavation will be <br /> approximately 8-feet„below grade. The excavation will also <br /> The locations of these same our letter report. A Chain, <br /> ass the lateral extent of contamination Present in the �`-1 shown on the Generalized Site Plan in <br /> __--address <br /> ✓,. g <br /> AAR10d 00osystems <br /> : ; � d lae0systems <br />