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SOIL SUITABILITY STUDY 77tdhiird POSED IMPROVEMENTS/DEVELOPMENT aph on Page 1 ofthe Phase I report discusses the description of the site with Zoning/General Plan information on the Title Page. Site maps in Appendix A illustrates vicinity location and the location of all on-site improvements. Since the area of subject property is large enough to encompass the existing restaurant and future ARCO Service Station, in addition to on- site wastewater and stormwater management, improvements are economically feasible and logical. SSS§ 2.0 PRESENT AND PAST USES OF THE SITE While the Omelet House Restaurant has been at this location for a number of decades, it only composes a small footprint in relation to the entire subject property area of 2.81 acres. This comparatively large acreage however, has allowed the restaurant's wastewater effluent to be disposed of under an expansive disposal area. It is my understanding that there has been no other developments or improvements to the subject property, other than the restaurant and a large billboard sign, which is scheduled to be removed. There is no evidence of any other past improvements. Historical photos back to 1970 show no other items on the property. SSS§ 3.0 EXISTING AND PROPOSED SEPTIC TANK USAGE The grease interceptor and conventional septic tankage for the restaurant are unknown(i.e., exact orientations, piping size diameter, number and size of tanks). Existing septic tank usage is further explained on the first three Pages of the Phase II Report. Descriptions of the proposed grease interceptor and conventional tankage to be installed are discussed on Page 3 of the Phase II Report. Permits that were found in the EHD microfiche files illustrate the installation of. A three compartment distribution box, a 1500 gal. grease interceptor tank as"surge control"and a lift station. Six, five ft dia. seepage pits were installed. These documents are found in Appendix E of the Phase I Report. No other documents were found indicating septic tank repair history for on-site or surrounding area tanks. Effluent disposal structures are assumed to consist of leachline trenches, sumps and seepage pits. Exact number and location of these structures are basically unknown; only the general locations can be delineated and is immediately to the west of the restaurant building and extending toward Newton Road. The remaining area north of the restaurant is for patron parking. Further north, and to the north property line, is Class 8 vehicle (big rigs)parking. SSS§ 4.0 GROUNDWATER INFORMATION Groundwater information in this Section will be limited to the current domestic water, which is LLtuhis ied by California Water Service (Cal Water). Groundwater depth, elevation and gradient the subject property are discussed in the Nitrate Loading Study Section §2.0 on Page 4 of eport. Supporting documents for Section §2.0 include Lines of Equal Depths and Elevations ecific years found in Appendix B. Page 2 of 11 Chesney Consulting