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evidence of contamination was removed. Approximately ? feet was <br /> removed from the east wall of the excavation, but no evidence of <br /> contamination was observed, and operations ceased. The final <br /> shape of the pit was approximately 35' long, (N-S, ) and 20' wide, <br /> (E-W, ) and 0 ' deep. A total of about 520 CY of spoil was <br /> removed. The operation was supervised by Mr. Hunter , and <br /> witnessed by Mr. Knoll of the County EHD. <br /> Soil . samples were collected from the backhoe bucket by Mr. <br /> Hunter , using properly prepared brass tubes supplied by the <br /> testing lab; they were promptly sealed, labeled and stored can <br /> ice. The locations of the samples was approved by Mr. Knoll , and <br /> are shown on Plate XV. The samples were transported under proper <br /> chain of custody to FGL laboratory for analysis; (refer to <br /> Exhibit K. ) <br /> The results of the laboratory analysis, (Table VI , ) showed a very <br /> small of toluene present in the samples from the west wall and <br /> the bottom-south. All tither tested substances were below <br /> detection limits. The minor amount of Toluene remaining is far <br /> below the maximums allowed to be left i n place as determined from <br /> the LOFT Manual Leaching Potential Analysis worksheet. Plates XI <br /> • & XII show the final locations & configurations of the two exca- <br /> vations after completion of the work covered by this report. <br /> QQNE LUgjQt! The very minor amounts of substances remaining the <br /> the two pits are well within the allowable levels as set forth in <br /> the LOFT Manual , and do not present any current or future threat <br /> to the groundwater at this location. <br /> RECOMMENDAT T ONS <br /> ( 1 ) Both excavations should be filled with either properly <br /> manifested clean soil , or clean material presently on site which <br /> does not meet criteria for aggregates_ <br /> (2) After proper profiling of the the spoil removed from the two <br /> excavations, a detailed plan for handling the material should be <br /> prepared and submitted to the County for approval . Upon <br /> completion of the that phase of the operation, a formal request <br /> for site closure uld be made. <br /> RED Ge <br /> William a. er <br /> yl'I�LVti�x lilll�EA <br /> August 23, 991 <br /> Sl9 ��Q <br /> 7 <br />