SU0005713 SSCRPT - Laserfiche WebLink

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Napo *400 The aerial photographs of the subject property were obtained and reviewed for possible information on the previous land use of the property, and possible explanations for the mounds of soil and discarded surface material. For the years 1957 and 1970,the attached aerial photos show a road leading to the southwest corner of the property. Structures also appear to have been built in this area. The 1957 aerial photo also appears to show buildings in the northwest and northeast comer of the property. g-The referenced mounds of soil in the southwest corner of the property raised the suspicion of possible buried material. As referenced above, due to the time constraints and cost effectiveness, it was decided to use a backhoe to excavate and investigate this area. The apparent buildings in the northeast corner of the property in the 1957 aerial photograph were also enough evidence to conduct additional subsurface explorations in the northwest and northeast comers of the property. Before the backhoe excavations began,representatives of the Environmental Health Department were contacted on May 7, 2002 for permission to excavate, assess and remove any encountered buried material, contingent upon this material not having been burned and also being non- hazardous. Approval was sought and obtained from EHD to proceed with an excavation and the backhoe was subsequently scheduled. On May 9, 2002, excavation of the referenced soil mounds began. The soil mound consisted of approximately 20 cubic yards of soil. After removal of these mounds, approximately three feet under the mounds, various items were discovered. There was no evidence of hazardous materials, and none of the material buried appeared to have beenBumnedbefore it was buried. Excavations proceeded down to easily recognizable native soil. As illmmstrated in the attached photographs, the buried items consisted of wood, glass bottles, iron pipe(magnet attraction), copper wire, cloth,paper, robber, a Chevrolet tailfin, three hubcaps, ten tires and three wheels. A septic system(tank and leachline) that may have been associated with this structure was not found. After this area was completely excavated and the underlying items removed, clean excavated soil was used to backfill the backhoe pits. Direct observations of the backhoe soil explorations in the northwest and northeast area of the property on May 16, 2002, revealed the soil to be extremely hard and tight. Penetration of the soil surface by the teeth of the backhoe bucket was extraordinarily difficult. From these direct observations, it can be concluded that it is unlikely that anything was buried in these northern locations. On May 17, 2002, approximate1 22,000 pounds of material, consisting mostly of the aboveground construction material and excess soil, along with much smaller volumes of the excavated buried material, was transported off-site to the Forward Landfill as illustrated by the truck scale tickets. Page -4- Chemq CmsuhiV