1600 MADISON ST 2016-01-01 MF Import

C Test Results/Conclusions: On yay 20, the author took seven soil samples from tne pit wh;n the e�ca�•ations were completed (See the Ma� 21, Sampling Plan in appendi:< B11. _ :11so, the stockpiles in the east parking lot were tested as composite of three sampies on *fay 18, lSee Sample s Comp.�l on Map 18-20, Test Results in Appendix B) and on the completed stockpiles on May 20, (See Sample �8 contam. stock and #9 clean on same lab sheet). The North Creek Analytical Lab test results indicate that the north side of the pit is clean, but that the remaining sides and bottom are still contaminated. It is believed that because the till was so dense, no roots found t� provide channel for ¢asoline migration and no ground water present to carry away the contamination that the majority of the current gas spill, probably 90X of the current spill, has been removed. What remains is the result of the long term spill from approximately .1981 to May 15, 1991. This is supported by the three Metals Analyses dated June 1fi, by ivorth Creek Labs which shows presence of lead or the spilling of lead�d gas from this tank. Status of Soil Remediation: On July 19 and 22, the City's Contractor, Demolition Man Inc., meved the stockpiled con�aminated so;l to an abandoned runway at Paine Field and spread the 2i0 yd3 to 12 itiches maximum over 6 mil. plastic and between hay bales. The contractor could only till the top 4-5 inches with the small farm tractor tiller but with a few heavy rains the soil has been tested by Environmental Materials Resources and founded to be Class 1 soil here on September 11, 1991. Our contractor dumped the soil in n industrial fillsite just south oP the runway about 2,000 feet (See Appendix B for test results and sample plan with the E.M.R. Inc. letter). Stockpiled soils, G-TPH and BTEY soils tests were performed as follows: 1. At original stockpile site at Fire Station No. 5, May 18, 1991 2. At Paine Field August 1, 1991 -kl 4" deep ma:c. 2 Composite Discrete 3,500 ppm 1.8 pPm