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C <br />October 23, 2007 G-2611 <br />1030 N. Park Drive, Everett, WA Page 5 <br />Geologically Hazardous Areas: Geoteclmical Letter <br />moisture through the slab. The capillary break should consist of a minimum of six (6) inch thick <br />tree -draining layer of 1.5 inch minus gravel containing no more than five (5) percent fines <br />passing the No. 4 (1/4-inch) sieve. To reduce water vapor transmission through the slab we <br />recommend installing a 10-mil reinforced vapor barrier, such as Moistop' by Fortifiber <br />Corporation, between the capillary break and concrete floor slab. Two to four inches of sand <br />may be placed over the membrane for protection during construction (optional). <br />Drainage <br />Roof and driveway water should be collected and discharged to the stone sewer if available or to <br />the base of the bluff, as is being done with the house roof water. Footing drains may be <br />eliminated provided the soils at the base of the footing consist of clean permeable sand. <br />REPORT PREPARATION AND CONCLUSION <br />The services described in this report were prepared under the responsible charge of Mr. Wade J. <br />Lassey. Mr. Lassey is a geologist as defined by EMC 19.4. Mr. Lassey understands the <br />requirements of the current Geologically hazardous Areas Chapter EMC 19.37.080 and the <br />definitions of the applicable terms contained within EMC 19.4. Individuals under the <br />responsible charge of Mr. Lassey have performed a geological assessment, conducted a field <br />investigation, and researched historic records on or in the vicinity of the above referenced site. <br />III my opinion, the scope of services completed for this project is adequate to meet the <br />requirements of the Department. I have concluded that the proposed development will avoid <br />impacts to the geologically hazardous area and no geological hazards will result from the <br />proposed development either on site or any adjacent properties. <br />LIMITATIONS <br />This report lies been prepared for the specific application to the subject project. The findings and <br />recommendafi.ins stated herein are based on our field observations, our experience, and <br />judgement. The recommendations contained herein are our professional opinion. No warranty is <br />expressed or implied. It is understood that constructing on, below, or above a steep slope has <br />inherent risk and the property owner assumes the risk. <br />GEO Group Northwest, Inc. <br />—�L <br />