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APPENDIX A <br />FIELD INVESTIGATION <br />Exploratory Test Pits: The fi e ld investigation con s isted o f a surface reconnaissance and a <br />subs urface explo ra tion program u sing a rubber-tired backhoe equipment to excavate <br />19 exploratory test pits on October 22 a nd 23, 1997, t o a maximum d e pth of 18 feet. The <br />approximate locations o f the test pits are sh own o n the Site Plan, Figure 2. The soils <br />encountered were continu o u sly logged in the field by o ur representative and described in <br />accordance w ith the Unifi ed Soil Classification System (ASTM D-2488). A summary of the <br />subsurface conditio n s encounte red in o ur test pits is summarized in Table A-1. A key t o <br />the classification of the soil and roc k , are included as part of this appendix. <br />The locati o ns o f the test pits were approximately dete rmined by pac ing from reference, <br />and -sh o uld be con sidere d a ccura te o nly to the deg ree implied by the method u sed. <br />Representative bulk soil s amples were obtained fr o m the test pits a t selected depths. All <br />samples were retu rne d to o u r l aborato ry for evaluatio n and a ppropria te tes ting. <br />TABLE A-1 <br />SUMMARY OF EXPLORATORY TEST PITS <br />Test Pit Depth Description <br />Number (feet) <br />TP-1 0-7 Colluvium: S·ilty Clay (CL-CH)-Dark hrown , m o ist ,trace fin e sand, <br />rootlets <br />7-11 Bedrock: Sandstone -Reddish-brown to brown, highly <br />weathered, fri a ble, fine to medium sand , inte rhedded <br />siltstone <br />TP-2 0-1½ Colluvium: Silty Clay (CL-CH) -Dark brown, dry to m o ist, trace fi n e <br />sand and gravel, tr ace rootlets <br />1½ -5 Bedrock: Sandstone -Li gh t brown a nd reddish brown, highly <br />weathered, very friahle , fine to medium s and, <br />inte rbe dded si ltston e <br />TP-3 0-5½ Colluvium: S ilty Clay (C.l-CH) -Brown to dark hrown, dry to moist, <br />tra ce fin e sand and g ravel, trace rootlets <br />5½-7½ Bedrock: Sand,tone -Li gh t hrown and reddish hrown , highly <br />weathered, friahle , fine ro medium sand , interbedded <br />s iltstone <br />LO\NNEYAS::'CCIATES <br />Em,i ronmental / Geotechnical/ Engineering Serv1ees ---------------------Page A-1