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►- %W~ ._01✓ S <br />GD <br />8 <br />Color Spot, Inc. <br />March 28, 1989 DRAFT (88168A) <br />6. <br />the southern and southwestern portions of the excavation, and extends laterally <br />v to an unknown length and vertically at least 3 feet below the bottom of the <br />excavation (or to a depth of at least 12 feet). <br />.. Although the UST was thought to have contained only diesel fuel, the <br />analytical results (the elevated TEX concentrations) and odors detected indicate <br />that gasoline may also be pr i e sur-fac�'�t\appears that at some <br />time in the past, the UST, a revious US o a second UST w s present and stored <br />gasoline. The concrete pie es a to n st—o€—�''-a concrete slab may have <br />been used as a base for a second fuel dispenser in the past and could account <br />for the contamination in the southwestern portion of the excavation. <br />r <br />Before a proper remedial action plan can be developed for the site, <br />the nature and lateral and vertical extent of soil contamination and, if <br />required, ground water contamination will have to be determined. To accomplish <br />this, we recommend that a phased site assessment, including a soil vapor survey <br />followed by the drilling of soil borings completed to monitories wells, be <br />conducted under the supervision of the EHD. After the nature and lateral and <br />vertical extent of contamination are known, a remedial action plan for the site <br />can be developed and implemented. <br />SGD is prepared to meet with Color Spot, Inc. and appropriate <br />regulatory agency personnel to discuss the results, conclusions, and recommenda- <br />tions of this report. We are prepared to assist Color Spot, Inc. with the <br />�. implementation of the recommendations included herein. <br />This report has been prepared for the exclusive use of Color Spot, <br />` Inc. with specific application to the UST removal at the Color Spot Lodi, Inc. <br />property. The project was conducted in accordance with generally accepted <br />environmental protocols. No other warranty, express or implied, is made. If <br />you have any questions, please contact one of the undersigned. <br />V <br />r <br />r <br />r <br />r <br />Sincerely, <br />STAAL, GARDNER & DUNNE, INC. <br />DRAFT <br />Gerald A. Hels <br />Registered Environmental Assessor 625 <br />GH:DG:av/31 <br />c: Mr. Frank Preiss, Color Spot Lodi <br />David A. Gardner <br />Certified Engineering Geologist 969 <br />