1303 W MUKILTEO BLVD 2016-01-01 MF Import

r LJ Report Short Plat May 4, 1990 Page 2 .� � � 2. Measure slope profiles and perform hand exploratior.s where backhoe access is not feacible. 3. Provide evaluation of the slope stability and general guidelines to maintain slope stability, � J J J � `I �� ;� � � �� L�! � � 4. Provide gene�al recommendations for site development and fouadation support of anticipatad structures. 5. Provide a written report outlining my conclusions and recommendations. SITE CONDITIONS SUI:FACE CONDTCIONS The site slopes moderately to steeply down to the west from Mukiltao Boulevazd. A road cut has been excavated from the southeast property corner that traverses the slope to the north. 'Ii�e road then has a switchhack and traverses to the south. A slope profile was surveyed at two locations using a Brunton Compass and a 100 foot tape measure. This survey should be conside �d accurate only to the degree implie� by these methods. The cross-sections from this data aze shown on Figures 't and 3. The average slope angles aze on the order of 22 to 25 degrees (40 to 47 pe�cent). This hu been steepened at the road cut location and where the yard azea from the lot tu the west has been cut into the slope. The vegetation on site consists of brush and berry vines. Almost all of the trees have been removed from the site over a period of years. Horsetails were observed at the lower elevatioas on the cross-section to the north. The horsetail typicaliy indicate year round near surface ground water. SUBSURFACE CONDITIONS Subsurface conditions were explored at the site by excavating 4 test pits using a cubber dred tractor mounted backhoe. The test pits were excavated to depths varying from 4 to 9 feet below the ground surface. The lo�:ation of the test pits are shown on Figure 1. L.ogs of the explorations were maintained and are presented in Figures 4 and 5. Shallow hand explorations were also done on the lower slope area. The subsurface conditions observed consist of l to 2 feet of topsoil that apPears to have been modified by past grading on site. Underlying the topsoil we encountered a recessional outwash in Test pits 1 and 2. 'Ibis material consists of inedium dense gravelly sand with some silt. Below the recessional outwash in Test Pits 1 and 2, and below the modified topsoil in Test Pits 3 and 4, we encountered an advanced outwash. The advanced outwash consists of inedium iense, becoming dense COUVRE77'E GEOTECiiNICAL EAIGINEERING