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AEGIS ENVIRONMENTAL , INC . <br /> 1050 Melody Lane, Sete 160, Roseville, CA 95678 + 916. 782-2110 1 916-969-2110!FAX 916.786-7830 <br /> I <br /> January 6, 1992 <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. Saderdln <br /> Aegis Environmental, Inc (Aegis), is pleased to provide this letter report documenting the <br /> results of air monitoring, from December 5 through December 13, 1991, at the subject site <br /> (Figure 1) The monitoring included measurements of a) concentrations of total <br /> petroleum hydrocarbons (TPH) In the (influent) air stream drawn from vapor extraction <br /> well (VEW) VEW-2, and b) concentrations of TPH in the exhaust (effluent) emitted from j <br /> an internal combustion (IC) unit temporarily operating on site (Figure 2) This report is <br /> based, in part, on information obtained by Aegis from Shell Oil Company (Shell) and is <br /> subject to modification as newly acquired information may warrant <br /> SITE DESCRIPTION <br /> The Pershing Avenue Shell site is an active service station that retails regular-leaded, <br /> regular-unleaded, and super-unleaded gasollnes The site is located in a <br /> commercial/residential area of Stockton <br /> I <br /> 89-016H RPT <br /> GEOLOGISTS - ENGINEERS - GROUND WATER SCIENTISTS <br />