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indicator at these sites. Boundary definition emphasized the delineation of midden extent, and may not circumscribe all associated cultural material. Since the 1960s, archaeologists have recognized that human habitation produces chemical changes in soil which persist for long periods and which may be detected by analytical methods (Arkley 1965; Cook and Heizer 1965). The relative percentage of carbonate present in the soil has been found useful as a gross chronological indicator and for purposes of site identification and boundary delineation (Johnston 1975; Peck 1970s). Soil samples from both on- and off-site locales were taken to test for carbonate, phosphate, pH, and soil color (Map 11, see Appendix 3). These tests were performed to substantiate boundary definitions and to investigate surface depressions of possible prehistoric origin which weren't necessarily associated with midden or other evidence of cultural activity. Results are presented by Ken McIvers in Appendix 3. Field carbonate testing, which consisted of applying a drop of 30 percent solution of hydrochloric acid to the soil, was conducted for preliminary results. Subjective observations on the degree of reaction (0-4), were recorded. A quick field test showed that the midden sites, containing fresh water shell, resulted in reactions ranging from light bubbling (2) to violent bubbling (4), while the surrounding soil produced either no reaction (0) or one detectable by a faint fizzing sound (1). Following site boundary delineation, site recording was accomplished in accordance with the guidelines of the Office of Historic Preservation (1989). Archaeological resources were recorded on Department of Parks and Recreation Forms (DPR422) as appropriate. Sites were mapped with a compass and tape, with some pacing at large sites. Site locations were then transposed to the most current proposed project plan to evaluate impacts and serve as a planning tool. 1 15