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Working To Restore Nature <br /> TPHg and total petroleum hydrocarbons as diesel (TPHd) using EPA methods 8015/8020 No <br /> petroleum hydrocarbon constituents were detected in the sample Groundwater analytical results <br /> are summarized on Table 2 Laboratory data with chain of custody documentation are included <br /> as Attachment 2 <br /> Stockpiled Soil <br /> On April 28, 1994, RESNA personnel, using a loader, manipulated the stockpiled soil by turning <br /> and spreading to further enhance and expedite natural petroleum hydrocarbon degradation <br /> processes <br /> A portion of the soil previously characterized by a 2 to 1 composite sample (sample MDT SPI-I, <br /> J-2 5', Table 1) as having a TPHg concentration of 420 ppm was spread at the southern portion <br /> of the stockpile to promote aeration (Figure 3) No soil samples were collected from the <br /> stockpiled soil <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based upon analytical results of the groundwater sample collected from the open excavation it <br /> appears that pumping and disposal of some 54,076 gallons of water has effectively removed the <br /> residual dissolved contaminants from the groundwater RESNA therefore recommends the <br /> remaining groundwater monitoring wells (MW2, MW3, MW4) be destroyed under permit from <br /> PHS/EHD in accordance with state and local guidelines <br /> To evaluate the progress of soil aeration, periodic field inspection of stockpiled soils will <br /> continue <br /> If you have any questions or comments please call our office at (209) 838-3507 <br /> Respectfully, <br /> RESNA Industries Inc <br /> J�hn P Lane <br /> Prgl t Geologist <br /> regory S hl <br /> CA Registered Geologist No 5023 <br /> cc John Dieckman <br /> CRWQCB <br /> 150059NSUR-694 FNL 3 <br />