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April 14, 2003 <br />Project No. 104690003 <br />Mr. John Macanas <br />California Integrated Waste Management Board <br />1001 “I” Street <br />P.O. Box 4025 <br />Sacramento, California 95812 <br />Subject: Waste Volume Estimates <br />Santa Fe Road Disposal Sites <br />San Joaquin County, California <br />Dear Mr. Macanas: <br />In October 2002, Ninyo & Moore personnel provided the California Integrated Waste Manage- <br />ment Board (CIWMB) environmental consulting services including assistance with the <br />exploration and logging of trench excavations at the Santa Fe Road Disposal Sites (SFRDS). <br />Trenches were excavated primarily to characterize and assess, to the extent possible, the loca- <br />tions and extent of buried wastes. The information obtained was intended to assist the CIWMB <br />with evaluating potential remedial action alternatives, as necessary. A total of 69 exploration <br />trenches were excavated at the SFRDS which includes four illegal disposal sites (IDS) referred to <br />as the Lynch IDS, Beard IDS, Lane IDS and Waller Property. <br />In March 2003, the CIWMB requested order-of-magnitude volume estimates of buried wastes at <br />the waste disposal sites based on information obtained from the October 2002 field investigation. <br />This letter-report provides rough order-of-magnitude volume estimates of buried wastes based on <br />the limited site investigation performed at the subject sites. Waste volume estimates were arrived <br />at by compiling information from the trench logs onto a waste summary table (Table1). The <br />types of buried wastes, locations, and depth information from Table 1 were used to develop a <br />GIS database. Figure 1 indicates the estimated rough order-of-magnitude aerial extent and thick- <br />