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UPDATE 30 11-11-94 <br /> secure the vapor sample . A small dedicated needle attached to a <br /> dedicated 1 cc syringe is then inserted through the sample septum <br /> into the tedlar bag. The lcc syringe is purged numerous times <br /> before filling it with the sample All but 0 . 5 cc of the sample <br /> is ejected from the syringe, into the air before infecting the <br /> remaining 0 5 cc syringe sample into the Shimadzu FID-GC (the <br /> calibrant injection is 0 5 cc) Once the chromatogram is <br /> recorded, an instrument blank is run prior to the next sample <br /> The analysis of the instrument blank will verify that no residual <br /> peaks are being carried onto the next analysis . <br /> Vacuum influence readings are obtained from the wells by <br /> attaching a manometer calibrated in mm water, to sample ports at <br /> the well heads These readings show the mm water pressure or <br /> vacuum that is being created at each well <br /> LIMITATIONS <br /> This report is based upon the following- <br /> A The observations of field personnel <br /> B The results of laboratory analyses performed by a state <br /> certified laboratory and WEGE' s non-certified <br /> laboratory <br /> C Referenced documents <br /> D Our understanding of the regulations of the State of <br /> California, San Joaquin County and the City of <br /> Stockton <br /> The services performed by Western Geo-Engineers , a corporation, <br /> under California Registered Geologist #3037 and/or Contractors <br /> License #513857, have been conducted in a manner consistent with <br /> the level of care and skill ordinarily exercised by members of <br /> our profession currently practicing under similar conditions in <br /> the State of California and the Stockton area Our work and/or <br /> supervision of remediation and/or abatement operations, active or <br /> preliminary, at this site is in no way meant to imply that we are <br /> owners or operators of this site Please note that known <br /> contamination of soil and/or ground water must be reported to the <br /> appropriate agencies in a timely manner No other warranty, <br /> expressed or implied, is made <br /> Sincerely yours, EDGe <br /> JACK E <br /> PER <br /> No 3037 <br /> George . Converse ack E N er <br /> Probe t Geologist s OFC Ca. Reg Geologist #3037 <br /> cc Ms Mary Meays, San Joaquin Coun y, (209) 468-3420 <br /> Ms Beth Thayer, RWQCB, Central Valley Region (916) 255-31.33 <br /> pagel3 <br />