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.. are DESCRIPTION OF PROPOSED MINING OPERATION The proposed mining operation is shown in figure 3, Map of Operations. The quarry will be mined to a depth of approximately 14 feet below existing grade. However, as it is the intent to stay out of the groundwater with the excavation, the maximum mine depth will be controlled by the location of the groundwater, currently estimated at a depth of 15 to 20 feet below grade. Side slopes into the mine during operations will not exceed 4:1. PRODUCTION SCHEDULE The following production schedule assumes a total 900,000 cubic yards of sand will be produced from the Landmark Lathrop Quarry over a three-year period. TABLE 1 ESTIMATED ANNUAL PRODUCTION Year Est. Trucks Per Day* Working Days Total (C.Y.) 1 100 250 350,000 2 100 250 350,000 �.. 3 100 143 200,000 * Assumes 14 cubic yards per truck y MINING PLAN After clearing and grubbing the existing almond trees and stumps, topsoil will be removed by conventional wheel scrapers and deposited in stockpiles immediately adjacent to the south side of the quarry within the boundary of 70-acre parcel. The stockpiles will be stabilized and protected form wind and water erosion. Isolated areas of clay and silt overburden will be removed in the same method as the topsoil removal. This material will also be placed in stockpiles for sale as a general fill material and stored for contouring the land prior to placing topsoil during the final reclamation process. The overburden stockpile is shown on Figure 3 in the northeast corner of the 90-acre parcel. After exposing the sand reserve, it will be excavated with scrapers and deposited in stockpiles within the quarry. The stockpiled raw sand product will be loaded into highway haul trucks of about 14 cubic yard capacity by a wheeled front-end loader. Mining first progresses both laterally and downward to depth of 11 feet below grade. The southeastern portion of the quarry, encompassing approximately 19-acres, will then be further excavated to a minimum depth of 14' below grade and perhaps further depending upon the actual groundwater elevation. After the mining operation is completed, backfilling will begin with the clay and silt overburden and completed with a layer of topsoil. Description of Facilities No permanent facilities will be constructed for the quarrying operation. Structures will be limited to a .. temporary portable office. The office will be a commercially available trailer unit. Surface Mining Application Page 6 Landmark Lathrop, L.L.C.