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' '!he refiue observed in the forested portions of ihe site consisted of househoid debris (induding <br /> a discarded water heater), construaion debris, tree stumps and slath piles, and automobile tires. <br /> We did not observe hazardous substances in the refuse piles;however, several ueaz a�•e:obscured <br /> � by vegetation. <br /> � Ground nodificatioa has occuaai in the southwest corner of the site, south of the progosod <br /> building fooiprint and near the existing suuctures on the noithem and central portions of the site. <br /> � It appears that some regrading including fi11 placement haz occurred in the,Ce ueas, partiadarly <br /> � <br /> ' the southwest corner. <br /> r� � SUBSURFACE CONDITIi7NS <br /> We evaluated subsurface soil and ground water conditions at the site by excavating 12 test <br /> pits to depths ranging from 4 to 12.5 feet with a CASE 580 backhoe. 'Ihe approximate l��cations <br /> of our test pits az•e showr.on Figure 2. Descriptions of the field exploration, laboratory testing <br /> procedures and the t�t pit logs aze presented in the appendi�c. <br /> 1t�e subsurface conditions encoante:ed in the test pits aze relatively uniform. A �h- to <br /> 1-foot-thick sod wne waz generally encountered in the t�t piu with the exception of tests <br /> � piu TP-10 and TP-11 which were located in wetland areas along the northern mazgin of the site. <br /> ' In test pits TP-10 and TP-11, a surficial approzimately 2-foo?-thick layer of organic siit and peat <br /> �` was encountered. We probed the,ee two wc�and azeas and the wedand to be fille�llocated near <br /> � the northwest comer of the proposed building footprint with a 'h-inch-0iameter stcel probe rod. <br /> � � Our probings indicate tLat the surficial organic ]ayers in these weUand azeas typically vary from <br /> about 1 to 3 feet in thickness with an average thickness of about 2 feet. <br /> As noted above, azeas of fdl may be encountered near the southwest comer of the site, <br /> !' south of the southern most wetland. While no fill was en�untered in our test pit TP-1, which <br /> was located in the vicinity, fill up to 8 feet thick and containing considerable construction debris <br /> was encountered in a test pit excavated in this area, northwest of TP-1 near the delineated <br /> wedand azea, during the preliminazy weUands study. <br /> Below die sod zone and peat/organic silt, medium dense to dense fine to medium sand with <br /> silt, gravel and occasional cobbles to silty sand with gravel and cobbles waz encountered in our <br /> test piu to depths ranging from 2.5 to 5 feet. This soil deposit grades :o a dense ta very dense <br /> condition below these depths and continues to the depths explored. This sand, gravel and silt unit <br /> � is refened to geologically az glacial tilt. It has been glacially ovenidden and has 6igh strength <br /> and low compressibility charaMeristics. The upper, less dense portion of the unit (to depths of <br /> "' ' 2.5 ta 5 feet) is weathered. The underlying till is unweathered and has a relatively h�gh strength <br /> ' and density. <br /> Wi•h the e�ception of ponded water in the identified wedand areas, no ground water <br /> seepage was encountered in our explorations. However, seasonally perched ground water <br /> conditions ohen develop above unweathered till during the wet season, within weathered till <br /> ' horizons or other soil units (such as fill) above the unweathered till. <br /> G e o E n y i n e e r a 3 Fle No.0975-017-R73I062993 <br />�� <br />