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WORK PLAN POTENTIALLY CONTAMINATED SOILS AT THE EL RANCHO ROCK & SAND, INC. QUARRY SITE RECLAMATION 1.0 INTRODUCTION The El Rancho Rock & Sand, Inc. Quarry, a small sand and gravel processing facility at 8020 Waverly Road in Linden, began operations some time prior to 1981 as "Linden Aggregates" and/or "Linden Sand and Gravel". In 1981, the property was issued Use Permit EP-81-9 for a 67.1 acre quarry site. In 1991, El Rancho Rock & Sand, Inc. was issued CUP QX-91-6 for an expanded quarrying operation which encompassed the entire 480-acre site. Processing operations at the plant ceased in September of 1993, before the permitted resources were completely quarried. The plant processing equipment was dismantled and removed from the site in December of 1993. The operation is now unofficially classified as "idle", or "inactive", and the approved Reclamation Plan is being implemented by Condor under the direction of the San Joaquin County Community Development Department. The site location is illustrated as Figure 1, Location Map. Figure 2, Site Plan, summarizes the site features relevant to the reclamation operation currently in progress. _ The Work Plan titled "Winter Stabilization Plan, Phase I of Reclamation", was submitted to the San Joaquin County Community Development Department, Development Services Division for their review and approval on March 3, 1994. Following discussions with Mr. Tom Gau, Senior _ Civil Engineer, the revised Work Plan was submitted on March 10, 1994. The drawings included in the Phase 1 Reclamation Work Plan are attached in Appendix II. The Phase I work was started on April 11, 1994. Implementation of the approved Reclamation Plan will require earthmoving, grading, and recontouring activities, as well as the demolishing and removal of mass and reinforced concrete. — It is anticipated that areas of potential contamination may be encountered in the near-surface and subsurface soil materials beneath or near the plant facility as well as in other areas of the site. This Work Plan has been prepared to describe the procedures for addressing the potential contamination. 2.0 STATEMENT OF THE PROBLEM Potential contaminants could be encountered at the project site as follows:. Tyne 1 Contamination. There may be areas of potentially contaminated soils in or beneath the area of the recent plant facility. These potentially contaminated soils could be present at the existing ground surface, or could be in the subsurface, originating when the plant was in another, much earlier configuration. Potential contaminants could include, but are not necessarily limited to; petroleum hydrocarbon products such as