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2 - Rocky's Restaurant September 4, 1984 Attn: Mr. Rocco Benigno Subject: Septic System and Filter Bed For Rock 's Restaurant Our recommendations for immediate action are as follows: 1) Expand the existing filter bed west as far as your delivery driveway, and to the south as far as is practical. 2) Construct a second filter bed on that area reserved for future filter bed expansion, or upon such land as may be leased from adjoining property owners. 3) Continue your filling of in the roadside ditch adjacent k to your filter bed to avoid any standing effluent. 4) Replace your toilet fixtures with "low flow" type fixtures if they are not already installed. 5) Set up a program to instruct your employees on water conservation. In the expansion of the existing filter bed and construction of the new filter bed, a distribution box should be placed so that you can alternate the use of the two filter beds, allowing one to dry out while the other one is in use. Care should be exercised in the construction of the filter bed; especially, if it is constructed over that area set aside for expansion which is presently used to park trucks. A soils engineer should be consulted as to the proper preparation of this ground for use as a filter bed. An area which_ has never been compacted, which you could lease from an adjoining property owner, would be much more ' suitable for a filter bed. The filter beds should be graded so that rain water will run off the filter bed area. Also, asphalt impregnated paper must be placed over the filter rock under the soil to keep rain water from percolating into the filter rock. In your continued filling of the roadside ditch, care must be taken so that the drainage is directed away from your filter beds into your driveway areas and that no drainage areas are prevented from reaching your drainage pond. This ditch appears to fall in the right--of-way for Thornton Road. You or your Contractor should obtain an encroachment permit from the San Joaquin County Department of Public Works before continuing work in this area. (Cont'd.)