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NorCal Engineering <br />Soils and Geotechnical Consultants <br />10641 Humbolt Street Los Alamitos, CA90720 <br />(s62)799-9469 Fax (s62) 799-9459 <br />September 27 , 2017 Project Number 19859-17 <br />Kennah Construction <br />6251 Vatcher Drive <br />Huntington Beach, California 92647 <br />Attn: Mr. Steve Espenschied <br />RE Report of Geotechnical Observation and Testing of Swimming Pool <br />Backfill Operations - Located at 16'17 East Washington Avenue, in the City <br />of Santa Ana, California <br />Dear Mr. Espenschied: <br />Pursuant to your request, this firm has provided this geotechnical report to summarize the <br />observation and testing performed by this firm for the swimming pool backfill operations at <br />the above referenced project, Our geotechnical services pertaining to the bacKill are <br />summarized in the subsequent sections of this report. <br />Backfill O oerations <br />The existing pool shell was completely removed. The exposed bottom was compacted to a <br />minimum of 9oo/o relative compaction prior to the placement of fill soils. The fill area was <br />approximately 16 feet by 34 feet with a maximum depth of 9 feet. The pool was backfilled <br />with approximately 4 feet of Y, inch diameter gravel. The gravel was overlain with filter fabric <br />prior to the placement of fill. Fill material placed was compacted to a minimum of 90% of the <br />laboratory standard in lifts not in excess of eight inches in thickness. A rubber tire loader <br />was utilized for compaction control. A water hose provided moisture control.