Laserfiche WebLink
� <br /> � APPENDIX A <br /> ( FIELD EXPLORATIONS <br /> Subsurfaa soil snd gmund water conditions u the site wae explored by excavadn� 10 test <br /> Ipits at the approximate locations ahown in Figure 2. 'Ihe explorations wae located in the fidd <br /> by paciug from existing siu features. Approximate elevadons ahown on the test pit loge ue <br /> I based on t6e drawiug eadded"A Topographic Survey of the Euterly 5 Acrea of Lot 2E,Saway <br /> Center Five for Cintas" dated 1/18l94, by GeoDimensions. <br /> � 1be test pits wae eaccavated on January IQ, 1994 by FED-EX Conatcuction of I�iaca <br /> Istaod,WasLington,using a track-mounted hydraulic excavaWr. 'Ihe test pits were acctvated to <br /> dapths nngiog from approximatdy 7 to 9 faet below the existing ground aurface. '!be <br /> I explorationa were backfillad with t6e excavated mataial upoa completion. <br /> ( 'Ibe explorationa wae continuously aroniwred by a gootxhnicel enginea 6rom our fum <br /> � who visually clasaified We aoila encountered,obtained represemstive soil a�mples,fidd ecreeaed <br /> the soil samples for the presenx of potentislly hazardous substa�►cea or petrolam 6ydrocubons, <br /> obsaved ground water seepage conditions and prepazed a detailed log of each explorrtion. Soils <br /> � encounterod were classified in general accordance with the classification system desexibod in <br /> Figure A-1. '17�e test pit logs aze presented in Figures A-2 through Afi. <br /> � FIELD SCREENING OF SOIL SAMPLES <br /> � Soil samples obtainad from the test pits wera scrcened in the field for evidence of <br /> petroleam- or solvent-related contamination using (1) visual ezamiaation, (2) aheen �creming, <br /> and (3)headspace vapor saoening with a Bacharach TLV Sniffu calibrstad to hexane. 'I�e <br /> � results of headspace and sheen screentng are included in the test pit logs. <br /> Visual screening consists of inspecting the soil for stains indicative of petroleum-rdated <br /> � contamination. Visual screening is generally more effective when contamination ia related to <br /> heavy petroleum hydrocarbons such as motor oil or hydraulic oil or whea hydrocarbon <br /> concentrations aze high. Sheen screening and headspace vapor scrcening aze moro seasitive <br /> Imethods that have been effective in detecting contamination at concenuations less than regulatory <br /> cleanup guidelines. <br /> � <br /> l <br /> I <br /> l <br /> IG e o fi n j i n e e r � 11 - 1 Fik No.3Il6-0Dl-R01/Q2N94 <br />