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concentrations ranging from 12 to 21 mg/kg. The concentration of unknown <br />hydrocarbons in SP -3 (W) was below the laboratory method detection limit. These <br />unknown hydrocarbon concentration levels are significantly below the applicable action <br />level of 1,000 mg/kg <br />These results indicate that there is no significant threat to human health and/or the <br />environment at this site. Therefore, Geofon requests "No Further Action" at this site. <br />Geofon appreciates your continued cooperation. If you have any questions regarding this <br />matter and/or require additional information, please do no hesitate to call one of the <br />undersigned at (916) 681-3601. <br />Sincerely, <br />Geofon, Inc. <br />Z� <br />Robert Castaneda <br />Project Manager <br />Garrett D. Weiss, R.G. <br />CA Registered Geologist, No. 7023 <br />cc: Mr. Larry Smith — USACE Sacramento Resident Office <br />