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:h <br /> i <br /> 1 <br /> Royal Oak satdngs cfc Lom <br /> Fina!Remaftdon Plan <br /> Page: 3 <br /> i � <br /> R' 2.5 Badfill <br /> Soil removal from the excavation that was considered "cIean" had to be tested to <br /> demonstrate that it was "clean" as it was backfilled into the hole. 'I hT s sampling <br /> was performed ac we filled the hole. The soil originally from the top of the <br /> excavation was analyzed on 21 September 1990 and was put into the bottom o: <br /> the hole first,as we already knew it was clean. Backfljl was tested by a <br /> certified lab for compaction and meets or exceeds the standard for engineered <br /> backfill. <br /> Z6 RWIE Smpft g <br /> Backfill sampling was accomplished under the direction ofG reg Lyons of San <br /> Joaquin County Environmental Health Department. At Mr. Lyon's direction, <br /> We Sam led the soils in "lifts"from the bottom, up to the te►p: As a "lift" was <br /> completed, we entered the excavation and n'atai led 9 samgIes from the floor. <br /> Those 9 samples were then composited by+he lw<oratory to obtain one sample <br /> for analysis. Diagrams of soil sample locations are in tine figures with a list of <br /> H%as measured from <br /> grade to the top of a lift.- <br /> 2.7 09mr Sampling <br /> At the direction of the San Joaquin County Environmental Health Department, <br /> we obtained soil samples from the bottom of the excavation. One sample was <br /> taken from the.11oor in the center of the excavation, two samples in each wall <br /> were taken 10 feet from each corner and one font above the floor. "Fresh" soil <br /> s was reached b `di n <br /> Y g into the fleor and side walls approximately one foot. <br /> Samples were obtained by driving a brass tube into the wall and.floor. <br /> We also obtained a "grab"water sample by digging into the aquifer with a <br /> shovel and letting the hole fill with water,again this was done at the direction <br /> of the Health Depiu:ment. All analytical data is included in this report and all <br /> samples were taken using approved sampling..methods.-Samples-were all <br /> --- -------- --anialyzed by a labcertifiedto p <br /> erform the analysis. <br /> The water sample obtained from the renter of the excavation was not taken <br /> using EPA protocol. A"dip" sample is always subject to contamination from <br /> gloves, hands, and contamination from the outside of the container. In <br /> ` addition, no care was taken to clean the shovel that dug into the groundwater <br />