2515 COLBY AVE 2016-01-01 MF Import

� M b � i0 � s J .. . .. . . . _ . � � C M � HV� K � n i WG-1049-01-067 y A LOJIS Corpora:ion Page 11 � y � July 18, 1991 ro � i.4 o H C. Conclusions z �' ' Based on informadon developed thus fx:, it is appazent that soil in the vicinity of borings B-1 � y and B-103 conlains residual concentrations of TPH which exceed the 200 ppm recommended 5� y � deanup level (R�L) for soil esG�blished by the Washington Department of Ecology (Ecology) ?S � H (Model Toxics Control Act Cicanu� Fegulation, 2/28/91). Strict adherence to Ecology's ' � � r mgulations require^�that soils possessing a concentration of TPH greater than 200 ppm be trcated o � or removed. , D. Recommendalio�vs Remove the TPH contaminated soil and either veat the soil onsite or dispose of the soil in a ' landfill suitable for receiving TPH contaminated soil. We estimatc that approximately 20 cubic - e , *"�'' yards of soil will require removal and on-site treatmert or offsite disposal. V rnivrrortrTlON OISSERVATION � The a��a�ysis and recommendations submitted in this report aze basui upon the data obtained I �� fro-n the eleven (I1) soil borings. The nature and extent of variations of subsudace co�ditions � beiween the borings may not become evident until conswction. If variations then become apparent, it will be nccessary to re-evaluate the recommendations of this report. , � '�� , �...�� We recommend that our firm be retained to provide geotechnical and environmental sen��ces during site grading, removal of contaminated soil, foundation excavation and retaining wall � foundation preparation and backfilling ro observe compliance with the design concepts, � , i ��' ' specificauons and recommendauons presented in this mport. Our presence will also allow us �� ' ' to modify the design if unanticipated subsurface conditions are encountered. ; ' (�1 . i � r �k44�FkW MM�kMMt41M4f M MyMrtW+M+Ft4+Y4M�k4M�kkM�Fk�F�Y##�F�M��M#M �� � '�'_' ('� �� I� i � ��r i') t� . � Y y �4 � 1(aldveerAasoelalac