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� w i sr "` r IYa Royal Oak Sawngs A Loan Knal Rww adon Flan Page. d table. The hole was dug and left open approximately 24 hours prior to sampling the water as well. In the opinion of W141'Environmental, this sample should be considered an anomoly at this point, although the results are not totally inconsistent vrith previous data from MW-I. We have not enclosed information on the"spoils" pile,as it will be remediated under the auspices of the San Joaquin County Air Pollution Control District. We will include a full report on the remedial sampling and activities when it is completed. We anticipate 30 October 1990 as the date of actual completion of aeration, final analytical data on approximately 12 November 1990,and the ' final report of aeration activities by 30 November 1990. 2.3 Manuorirtg Wells c Due to the fact that the excavation was expanded,`Monitarie."Wells 1 and 3 "• (MW�l-and-3)weir:destoyed�_NW-1 was dry and was originally scheduled to be excavated, MW-3 was not scheduled for removal. WHF Environmental did obtain proper permits for the destruction of these wells and copies of the pen-,it are in the figures section. Well destruction was accomplished by excavating to .•ti the bottom of the wells and removing the casings under the direction of San Joaquin County Health Department. No conduit from the surface to groundwater exists, as a result of the destruction of the wells. — 2.9 Ckologv of rk Site The site consists of alluvial fan deposits within the Valley. Soils are predominantly sandy with.a thick cloy layer from approximately 10- 17:.et, and alternating layers of sand and clay. . i i 3.0 ANALCAL DATA t_ 3.1 conclusions T 'There may be small amounts of residual soils contamination left in the 4 excavation, as in all excavations, however, soil samples taken from the bottom of the excavation and the side walls indicate that the contaminated soils have been removed to a "non-detectable" level,with the exception of the southwest