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.s a 110 2nd Avenue South,##D7,Pacheco,CA 94553-5560 McCAMPBELL ANALYTICAL INC Telephone 925-798-1620 Fax 925-798-1622 J4 http//_www mccampbell corn E-mail main@mccampbell com • Ground Zero Analysis,Inc Client Project ID #256,Gabbard Date Sampled 10/25-10/27/99 1714 Main Street Date Received 10/29/99 Escalon, CA 95320 Client Contact John Lane Date Extracted 10/29/99 Client P O Date Analyzed 10/29/99 Total Recoverable Petroleum Hydrocarbons as Oil&Grease(with Silica Gel Clean-up)by Scanning IR Spectrometry* EPA method 418 1 or 9073,Standard Methods 5520 C&F Lab ID Client ID Matrix TRPW %Recovery Surrogate 24376 GAB SB8-31 S ND 94 24377 GAB SBGW-26 W ND 97 24378 GAB SB6-25 S ND 92 Reporting Limit unless otherwise W 10 mg/L stated,ND means not detected above the reporting limit S 10 mg/kg *water samples are reported in mg/L,wipe samples in mg/wipe and soils and sludges in mg/kg "surrogate diluted out of range or not applicable to this sample 'At the client's request or the laboratory's discretion,one or more positive samples may be run by direct infection chromatography with FID detection The following comments pertain to these GC results a) gasoline-range compounds (126-Cf2) are present, b) diesel range compounds (C10-C23) are present, c) oil-range compounds (>C18)are present,d)other patterned solvent(9),e) isolated peaks, f)GC compounds are absent or insignificant relative to TRPH inferring that complex biologically denvcd molecules are the source of IR absorption,h)a lighter than water immiscible sheen is present,i)liquid sample that contains greater than—5 vol %sediment DHS Certification No 1644 _Edward Hamilton,Lab Director