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0 Appendix A <br />LOGS OF BORINGS AND MONITORING WELL DETAILS <br />Subsurface conditions were investigated by drilling six borings (P-1 <br />through P-3 and G-1 through G-3), ranging from 40-1/2 to 215 feet in <br />depth at the locations shown on Drawing 1. Boring P-1 and P-2 were <br />drilled with a truck -mounted, hollow -stem, continuous -flight auger. <br />Borings G-1 and P-3 were drilled with air -rotary drilling equipment. <br />Borings G-2 and G-3 were drilled with mud -rotary drilling equipment <br />after the original air -rotary drilled borehole collapsed. Borings <br />were logged in the field by an EMCON geologist. <br />Exploratory Borings G-1 and G-2 were converted to monitoring wells to <br />measure ground -water levels under the site and to collect samples for <br />chemical analysis. Well construction details are presented with the <br />logs (except for Well W-3) are included here for documentation purpos- <br />es. <br />To enable the determination of the permeability of the unsaturated <br />zone lying immediately below anticipated excavation depths, Explora- <br />tory Borings P-1, P-2, and P-3 were converted to permeameters. These <br />were constructed essentially as dry monitoring wells. Construction <br />details are included with the boring logs. <br />Logs of the soils and other subsurface conditions encountered in the <br />borings are presented on Plates A-1 through A-44. Logs for site <br />borings by both EMCON and Kleinfelder are also attached. Soils <br />(surface soils and subsurface sediments) were classified according to <br />the Unified Soil Classification System. <br />