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.t, U}/2H/Ud U4: 4, out) lvlo ani.MAMII:lI • ,-. ,. t� December 2, 1992 File: 24-220182-1300 Mr. George Montijo American Moulding & Millwork Company P.O. Box 8220 Stockton, CA 95208 Subject: Site Relmediation Cost Estimates American Moulding & Millwork Company 2801 West Lane Stockton, California Dear Mr. Montijo: Per your meeting with Mr. Russ Carey, I am sending this letter to provide information concerning San Joaquin County requirements for excavation and sampling of potentially hazardous materials; and,, to provide a scope of work with cost estimates to comply with the county requirements and remove the material. Based on an assumed volume of soil, Kleinfelder anticipates, the total project cost to be approximately $70,000. ,Nearly $50,000 of this cost is associated with the disposition of the impacted soil. Therefore, Kleinfelder recommends that American Moulding & Millwork Company (AMM) contract directly with the facilities accepting the soil. Additional savings may be obtained by convacting the excavation and loading contractor directly, however, to facilitate project coordination, Kleinfelder currently proposes to contract the excavator. Furthermore, AMM should be aware that the volume estimates are' based on very Limited data, and a "fluff factor" of 1,5 for calculating in-place verses "on they, ground" volume (based on Kleinfelder's experience in San Joaquin County). As excavatiot and disposal costs depend significantly on the volurpe, the actual project cost may vary significantly from the estimated costs. If a more accurate estimated cost is desired, additional assessment can be performed. This letter presents the current San Joaquin County requirements, a scope of work to remediate the burn pit area, trench uea, and teepee area, and the anticipated frosts of remediation. County Requirements San Joaquin County requires a work plan for all subsurface samples collected for chemical analysis. In addition, based on the California Code of Regulations, Title 23, Article 11, San ` Joaquin County may require up to one month of public notification time prior to approving a work plan which includes remediation. Due to their interpretation of the Uniform Building Code, Chapter 70, San Joaquin County requires that an excavation and grading permit be acquired prior to the remtpdiation of soil by excavation, and the backfilling of the excavation. The first set of "teepee" samples did not require a work plan because they were surface samples. The trench wprk could be considered proprietary information and therefore not necessar,ity reportable to ,;he county. However, as discussed in the meeting, AMM'would like t() i), t the trench once the impacted soil is removed. San Joaquin County will require the e,_;, and grading permit to backfill the trench. As the trench and bum pit area will 1 k8-512-222 Pagel of 7 24-220182-Bo0 " Copyright 1992 Kleutfelder, lite.