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AEGIS ENVIRONMENTAL , INC <br /> 1050 Melody Lane, Sete 160, Roseville, CA 95678 + 916 -762-21101916 - 969-2110 I FAX 916. 786-7830 <br /> February 7, 1992 <br /> �F <br /> st Ya <br /> Mr Sayed Saderdin <br /> San Joaquin Valley Unified Air Pollution Control District <br /> 2321 West Washington Street, Suite 1 <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> Subject Results Report for Air Monitoring of <br /> Extended Pilot Vapor Extraction Test <br /> Shell Service Station (WIC No 204-7524-2408) <br /> 4445 Pershing Avenue, Stockton, California <br /> Dear Mr Saderdin <br /> Aegis Environmental, Inc (Aegis), is pleased to provide this letter report documenting the <br /> results of air monitoring, for January 1992, at the subject site (Figure 1) The monitoring <br /> included measurements of a) concentrations of total petroleum hydrocarbons (TPH) in <br /> the (influent) air stream drawn from vapor extraction well (VEW) VEW-2, and b) <br /> concentrations of TPH in the exhaust (effluent) emitted from an internal combustion (IC) <br /> unit temporarily operating on site (Figure 2) This report is based, in part, on information <br /> obtained by Aegis from Shell Oil Company (Shell) and is subject to modification as newly <br /> acquired information may warrant <br /> SITE DESCRIPTION <br /> The Pershing Avenue Shell site is an active service station that retails regular-unleaded, <br /> super regular-unleaded, and super-unleaded gasolines The site is located in a <br /> commercial/residential area of Stockton <br /> 89-016J RPT <br /> GEOLOGISTS - ENGINEERS • GROUNDWATrTt SCIENTISTS <br />