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_ECEffCD JUN 0 4 2003 APEX Ei�lNlii�UNMENT HEALTH //// 11244 Pyrites Way•gfiMITASADViCES E N V I R 0 T E C H , I N C . Phone 916.851.0174 • Fax 916.851.0177• Fall Free 1.800.242.5249 June 3, 2003 Ms. Margaret Lagorio San Joaquin County Environmental Health Department 304 East Weber Avenue, Third Floor Stockton, CA 95202 Subject: Dispenser Pan Upgrade Soil Sampling Results Report Arch Road Cardlock 4733 South Highway 99 Frontage Road, Stockton, California Apex Job 4 ERV01.001 Dear Ms. Lagorio: Apex Envirotech, Inc. (Apex) has been authorized by E. R. Vines and Sons, Inc. to submit this report documenting the results of soil sampling during the upgrade of the dispenser pans at the subject property. Once the dispensers were removed from the site, GeoAnalytical Laboratories, Inc. (Geo) personnel collected one soil sample from approximately 2-feet below each of the ten dispensers. The soil sample locations are shown on the Site Plan included as Attachment I. All of the soil samples were then transported under chain-of-custody documentation to Geo, a State-certified analytical laboratory. The samples were analyzed for: total petroleum hydrocarbons (TPH) as gasoline by EPA Method 5030; TPH as diesel by EPA Method 3550; benzene, toluene, ethyl benzene and total xylenes by EPA Method 8021B; and MTBE, TBA, D1PE, ETBE, TAME and ethanol by EPA Method 8260B. The laboratory analytical results are summarized in Table I (Attachment II). A Copy of the laboratory analytical report and the chain-of-custody form are also included as Attachment M. Apex proposes to conduct additional soil excavation in all locations exhibiting concentrations of petroleum hydrocarbons and/or additives above the laboratory detection limits. No more than 75 cubic yards of soil will be removed during this phase of excavation. Soil samples will be collected from the base of each excavation and analyzed for the constituents detected in the initial sample collected from the respective location. The information contained within this report reflects our professional opinions and was developed in accordance with currently available information, and accepted geologic and engineering practices. This report was prepared solely for the use of E. R. Vine and Sons, Inc.