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Home My WebLink AboutBLD2007-01350 GEO Assessment - GEO Geological Review - 10/10/2007 C) � SID GEOLOGICAL ASSESSMENT 321 EAST PANORAMA DRIVE SHELTON.) WASHINGTON PREPARED FOR THESE PLANS MUST BE ON TO BE KEPT IN THE PAUL BRONS FOR INSPECTION- PARCEL ONE PARCEL FILE BY GEOTECHNICAL TESTING LABORATORY OLYMPIA, WASHINGTON OCTOBER 2, 2007 Zb r CONTACT INFORMATION PREPARER INFORMATION GTL PROJECT NUMBER: 07-0535 CONTACT: HAL PARKS ADDRESS: 10011 BLOMBERG STREET SOUTHWEST OLYMPIA,WASHINGTON 98512 TELEPHONE: (360)754-4612 FACSIMILE: (360)754-4848 EMAIL ADDRESS: GEOTESTLAB@COMCAST.NET CLIENT INFORMATION CLIENT: PAUL BRONS CELLULAR TELEPHONE: (360)731-6536 FACSIMILE: (951)217-8960 MAILING ADDRESS: 836 NE FAIRGROUNDS ROAD BREMERTON,WASHINGTON 98311 SITE ADDRESS: 321 EAST PANORAMA DRIVE SHELTON,WASHINGTON 98584 PARCEL NUMBER: 320215602013 GPS LOCATION: N47" 12.653' W 123°30.843 #07-0535 10011 Blomberg Street SW, Olympia, WA 98512 2 Phone#: (360) 754-4612 Fax#: (360)754-4848 GEOTECHNicAL TESTING STING LABORATORY SCOPE OF UNDERSTANDING PAUL BRONS 836 NE FAIRGROUNDS ROAD BREMERTON,WASHINGTON 98311 RE: GEOLOGICAL ASSESSMENT SITE INFORMATION: 321 EAST PANORAMA DRIVE SHELTON,WASHINGTON 98584 GPS LOCATION: N47o 12.6481 W123o 03.8401 PARCEL NUMBER: 320215602013 Mr.Brons: As per your request, we have conducted a geological assessment and analysis for the above-referenced parcel. A site reconnaissance was performed on September 20, 2007. The results of this investigation are to be found in the following assessment. We have provided three copies for your review and distribution. We are also a full service laboratory that can meet all your building, testing(soils compaction, asphalt, concrete,) and other inspection needs. We appreciate this opportunity to be of service to you and we look forward to working with you in the future. If you have any questions concerning the above items, the procedures used, or if we can be of any further assistance,please call us at the phone number listed below. h Respectfully Submitted, 1Nashi,� GEOTECHNICAL TESTING LABORATORY o Harold Parks, L.G., L.E.G. Senior Engineering Geologist •`h nglneering Geologist 827 �`' ��, ,U Sed GeO\o HAROLD PARKS v xt aec3 7-31-09 #07-0535 10011 Blomberg Street SW,Olympia, WA 98512 3 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL T " STtNO LABORATORY TABLE OF CONTENTS CONTACT INFORMATION..................................................................................................................................2 SCOPEOF UNDERSTANDING.............................................................................................................................3 PURPOSE..................................................................................................................................................................5 SITECONDITIONS.................................................................................................................................................6 GEOLOGIC CONDITIONS....................................................................................................................................6 GROUNDWATER CONDITIONS.........................................................................................................................8 DEPTH TO COMPETENT SOIL...........................................................................................................................9 PAST SLOPE INSTABILITY 9 ................................................................................................................................. HISTORY OF LANDSLIDE ACTIVITY..............................................................................................................9 POTENTIAL FOR LANDSLIDE ACTIVITY......................................................................................................9 RECOMMENDATIONS..........................................................................................................................................9 VICINITYMAP...................................................................................................................................................... 1 1 SITEPLAN.............................................................................................................................................................. 12 907-0535 10011 Blomberg Street SW, Olympia, WA 98512 } Phone #: (360) 754-4612 Fax#: (360) 754-4848 GEOTWHNicAL TESTING LABORATORY PURPOSE The objective of the geological assessment is to assess the surface and subsurface conditions prevalent at the subject site according to Mason County Critical Areas Ordinance 17.01.100.E4. We understand the parcel will be developed by constructing a single-family residence. At the proposed building location, the slope ranges from 10 to 12 percent. The steepest slope measured onsite is approximately 60 percent on the southern edge of the property along Panorama Drive. The Mason County Resource Ordinance Geologically Hazardous Areas(12-27-2006)contains the following: 17.01.100 Landslide Hazard Areas E. Special Reports 1. Applicability Category d. Development proposed within 300 feet of areas with slopes between 1 S percent(8.5 degrees)and 40 percent (21.8 degrees) will require a Geological Assessment, and may further require a Geotechnical Report upon analysis of the following factors by the Director: (1)Lot size and use; (2) Overall height of slope and maximum any planned cut or fill (requires a grading plan from the applicant); (3)Soil types and history of sliding in the vicinity(from the Geological Assessment); (4) Groundwater conditions, including depth to water and quantity of surface seepage (from the Geological Assessment); (S) Approximate depth to hard or dense competent soil, e.g. glacial till or outwash sand (from the Geological Assessment); (6) Impervious surfaces and drainage schemes (requires development/grading plan from the applicant); (7) Wastewater treatment(requires on-site sewage disposal system approval from Mason County Department of Health); (8) Potential off-site impacts, including adjacent properties, roadways, etc. (requires environmental statement from the applicant, dependant on scope of project). The proposed building location will be over 60 feet from the oversteepened slope created when Panorama Drive was constructed. Hence, Mason Coun re uires a eolo ical assessment. #07-0535 10011 Blomberg Street SW, Olympia, WA 98512 5 Phone#: (360) 754-4612 Fax#: (360)754-4848 %AoTEcHNIcAL TESTING LABoRA TOR Y' SITE CONDITIONS The subject site is located approximately 1.8 miles east of the center of Shelton, Washington. The parcel is located in an area of moderate residential development; see the Vicinity Map(Figure 1)following this report. The site is currently bounded by Panorama Drive to the south, and undeveloped residential parcels to the north, west and east. See Figure 2 Site Plan. Access will occur from a proposed driveway from the southern portion of the site. Slope angles on this site range from 10 to 12 percent at the proposed building location. The lot has been cleared of most of the vegetation. The neighboring parcels are mostly vegetated with holly, sword ferns, bracken ferns, blackberry, ivy, Oregon grape, rhododendron as well as hemlock, maple, alder,and fir trees. Surface water was observed onsite in the northwestern corner of the site. No slope instability was observed at or around the proposed building location. Surrounding trees are straight and vertical. 14 oytlf aq. rn`CO3 4, -' i GEOLOGIC CONDITIONS The site is generally situated within the Puget Sound glacial upland. Multiple glacial advances deposited the onsite material. The near surface material was deposited during the most recent Vashon stade(stage)of the Fraser glaciation that occurred between about 9,000 and 11,000 years ago. Weathering and erosion has occurred since. In general, the soils are composed of gravelly sand with silt underlain by well cemented glacial till material (gravelly sand). Published descriptions of the onsite soils are included on the following pages of this report. Resources by Rogers and Walsh detailing faults in the Puget Sound were reviewed. No known faults are mapped near the subject site. The following geologic excerpts are for the educational purposes of the client and not necessarily for the review staff at Mason County. The Geologic Map of Washington — Southwest Quadrant (1987) has mapped the site geology as deposits of continental glaciers(Qgt). The report reads: Till— Unsorted, unstratified, highly compacted mixture of clay, silt, sand, gravel, and boulders deposited directly by glacial ice; locally contains outwash sand and gravel both within and overlying till. Consists of part of the Vashon Drift. The Geologic Map of the Shelton 1:100,000 Quadrangle, Washington, by Logan (2003) describes the site as late Wisconsinan(Pleistocene)glacial deposits. The glacial till(Qgt) is described as: #07-0535 10011 Blomberg Street SW,Olympia,WA 98512 6 Phone#: (360)754-4612 Fax#: (360) 754-4848 %AOTECHNICAL TESTING LABORATORY Till,late Wisconsinan (Pleistocene)—Unsorted, unstratified, highly compacted mixture of clay, silt, sand, gravel, and boulders deposited by glacial ice of the Puget lobe;gray; may contain interbedded stratified sand, silt, and gravel;sand-size fraction is very angular and contains abundant polycrystalline quartz, which distinguishes this unit from alpine till; cobbles and boulders are commonly striated and(or)faceted; although unweathered almost everywhere, may contain cobbles or small boulders of deeply weathered granitic rock. Geologic Map of the Shelton 7.5-minute Quadrangle, Mason and Thurston Counties, Washington by Henry W. Schasse, Robert L. Logan, Michael Polenz, and Timothy J. Walsh(2003)has mapped the site geology as deposits of continental glaciers(Qgt). The report reads: Vashon till—Unsorted and generally highly compacted mixture of clay, silt, sand, and gravel deposited directly by glacier ice; gray where fresh and light yellowish brown where oxidized; generally of very low permeability; most commonly matrix-supported but may be clast- supported; matrix generally feels more gritty than outwash sands when rubbed between fingers, due to being more angular than water-worked sediments; cobbles and boulders commonly faceted and(or) striated; ranges in thickness from wispy, discontinuous layers less than I in. to more than 30 ft thick; thicknesses of 2 to ]Oft are most common; mapped till commonly includes outwash clay, silt, sand, gravel, or ablation till that is too thin to substantially mask the underlying, rolling till plain; erratic boulders are commonly associated with till plains but may also occur as lag deposits where the underlying deposits have been modified by meltwater; typically, weakly developed modern soil has formed on the cap of loose gravel, but the underlying till is unweathered; local textural features in thick till exposed along Hammersley Inlet in the adjacent Squaxin Island quadrangle (Logan and others, 2003a) include flow banding and apophyses commonly extending 10 to 15 ft downward into underlying sand and gravel and that are oriented transverse to ice flow direction. The Soil Survey of Mason County, Washington, USDA Soil Conservation Service(1960)has mapped the site soils as a Shelton gravelly sandy loam, 5 to 15 percent slopes (Sf). The survey describes the Shelton gravelly sandy loam(Sf)as follows: This very extensive soil occupies undulating to rolling glacial moraines. The organic surface layer is I to 2 inches thick. The upper surface soil is friable, weakly granular, brown gravelly sandy loam, 3 or 4 inches thick. It is medium acid. At a depth of about 4 inches, the material is strong-brown to nearly reddish yellow gravelly sandy loam. This contains less organic matter and more shot than the surface layer and has a very weak, granular structure, or it is single grained. When the soil is cultivated, this layer and the surface layer can no longer be distinguished. From depths of 12 to 14 inches, and down to 25 inches, the subsoil is a reddish yellow very gravelly, sandy loam. This material is very friable and is massive to single grained. It is faintly compacted. Gravel in this layer and in the layer above is moderately coated with fine, reddish- brown material. Between the subsoil and the indurated till below is a 5- to 7-inch transitional layer that contains less clay than the layer above, is slightly compacted, and often has the color of light gray or yellow. At depths that normally vary from 30 to 36 inches, the soil rests abruptly upon an indurated, gravelly till, the upper 6 to 16 inches of which is very compact. #07-0535 10011 Blomberg Street SW,Olympia, WA 98512 7 Phone#: (360)754-4612 Fax#: (360) 754-4848 %AOTEcH SAL TESTING LABORATORY The till often has a weak, platy structure and is colored reddish, light yellowish brown, and yellowish brown. This upper part fractures to irregular fragments of angular and rounded gravel, which are cemented together. Below this and to depths of many feet, the till is cemented, light brownish-gray to grayish-brown gravelly sandy loam that is streaked with yellow and reddish brown. This till is a mixture of acid and basic igneous material, which distinguishes it from the predominantly acid igneous rocks of the typical Vashon, or continental, till. The cemented substratum slightly restricts the downward movement of moisture, but not enough to hold moisture through long dry spells. GROUNDWATER CONDITIONS Groundwater seepage was observed in the northwestern corner of the site. The seepage observed is at the grading cut. Wetland vegetation All 11 was not observed at the proposed building location or throughout the site. Research of the local wells indicates that depth to static ," f✓'F , groundwater range from 4 feet to 181 feet below ground surface. Mason County Code does not require the well logs to be included with this assessment,yet a summary of the well logs is provided below. h^ Neighboring Well Logs Owner Static Total Depth Section Township Range Andrew Smith 12 51 22 20N 3W Dale Steward Skittens 45 56 21 20N 3W Dw,id Putvin 70 99 22 20N 3W Ed Smith 69 99 22 20N 3W Edward Hicks 1 181 181 22 20N 3W Edward Hicks 2 134 178 22 20N 3W F Ray Peterson 25 165 21 20N 3W Gene Roberts 30 52 15 20N 3W Harry Johnson 36 58 21 20N 3W John Friend 123 195 16 20N 3W Marty Jensen 138 253 16 20N 3W O J Ashford 4 78 21 20N 3W Shore crest Estates 150 1 295 21 20N 3W Thomas Blake Abandoned 21 20_N 31r _Tom Moran 140 175 21 20N 3W Wayne CancU 81 131 22 1 20N_ 3W William Carlson 20 144 21 20N 3W The site is located along a south sloping hillside. No upland water bodies or wetland features were observed during the site reconnaissance or through the inspection of aerial photographs and topographic maps. #07-0535 10011 Blomberg Street SW,Olympia, WA 98512 8 Phone#: (360)754-4612 Fax#: (360)754-4848 G1160TECHNICAL TESTING LABORATORY DEPTH TO COMPETENT SOIL The building location is underlain by Vashon glacial till material. This very competent material was observed at approximately 14 inches below the existing ground surface. PAST SLOPE INSTABILITY Surrounding the subject site, trees were observed to be straight and vertical. No indication of past instability was discerned at the proposed building location. Active slumping and sliding was observed along the eastern coastal bluff. At the building location,the slope is between 10 and 12 percent,and no signs of instability were observed. HISTORY OF LANDSLIDE ACTIVITY No slumping and sliding was observed in the vicinity of the site or on the site. At the proposed building location, the slope is vegetated with grasses and invasive plants, and there is no indication of previous landsliding. Again, trees neighboring the site are straight and vertical. Review of available fault maps (Map Showing Known or Suspected Faults with Quaternary Displacement in the Pacific Northwest, and Active Faulting Investigation on the Canyon River Fault, Southern Olympic Range, Washington)revealed no known faults near the site. The Coastal Zone Atlas, Volume 9, Mason County(MA-23)maps the site as Quaternary glacial till deposits(Qgt). The material consists of undifferentiated glacial and nonglacial deposits. For this site, the slope stability is described as"Intermediate". POTENTIAL FOR LANDSLIDE ACTIVITY Even though slopes approach 12 percent at the proposed building location, the potential for landslide activity is very slight. The onsite and offsite slopes are not a concern for potential landslide activity. The surrounding area includes moderate slopes that are well vegetated. The Liquefaction Susceptibility Map of Mason County, Washington by Palmer, Magsino, Poelstra, Bilderback, Folger,and Niggemann(September 2004)maps the site area as having a very low liquefaction potential. The Site Class Map of Mason County, Washington by Palmer, Magsino, Bilderback, Poelstra, Folger, and Niggemann(September 2004)maps the site area as site class C. Site class C is a very stiff soil or soft rock. RECOMMENDATIONS There is no evidence of soil erosion or deposition onsite to suggest that the site should be included in the Erosion Hazard Area designation. No landslide hazard areas were observed within 300 feet of the site. Proposed activities and site conditions for the development do not warrant a more comprehensive Geotechnical Report. We recommend no further action is needed unless areas of concern are unearthed during construction or damage ensues from removing vegetation. To minimize erosion and sedimentation, we recommend that vegetation remain or be cultivated in areas outside the building location. If there are any changes in the loads, grades, locations, configurations or types of facilities to be constructed, the conclusions and recommendations presented in this report may not be fully applicable. #07-0535 1001 1 Blomberg Street SW,Olympia, WA 98512 9 Phone#: (360)754-4612 Fax#: (360) 754-4848 If such changes are made,we should be given the opportunity to review our recommendations and provide written modifications or verifications,as appropriate. Changes to the Mason County procedure may require our firm to revisit the subject site prior to development, if six months has elapsed,to ensure the conditions are in agreement with our original report. REPORT LIMITATIONS AND GUIDELINES FOR USE We have prepared this report for the exclusive use of Paul Brons and his authorized agents for the proposed residence in Mason County, Washington. Site inspections, research, and mapping have culminated in this report. This report is intended to meet the requirements of the Mason County Critical Areas Ordinance. This report does not specify setbacks for: line-of-sight setbacks, FWHCA setbacks, eagle tree setbacks, wetland setbacks, or property line setbacks. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in the field of geotechnical engineering in this area at the time this report was prepared. No warranty or other conditions,expressed or implied, should be understood. CONTRACTORS ARE RESPONSIBLE FOR SITE SAFETY ON THEIR OWN CONSTRUCTION PROJECTS Our geotechnical recommendations are not intended to direct the contractor's procedures, methods, schedule or management of the work site. The contractor is solely responsible for job site safety and for managing construction operations to minimize risks to onsite personnel and to adjacent properties. READ THESE PROVISIONS CLOSELY Some clients, design professionals, and contractors may not recognize that the geoscience practices(geotechnical engineering or geology) are far less exact than other engineering and natural science disciplines. This lack of understanding can create unrealistic expectations that could lead to disappointments, claims and disputes. Geotechnical Testing Laboratory includes these explanatory "limitations" provisions in our reports to help reduce such risks. Please confer with Geotechnical Testing Laboratory if you are unclear how these "Report Limitations and Guidelines for Use"apply to your project or site. GEOTECHNICAL,GEOLOGIC,AND ENVIRONMENTAL REPORTS SHOULD NOT BE INTERCHANGED The equipment, techniques and personnel used to perform an environmental study differ significantly from those used to perform a geotechnical or geologic study and vice versa. For that reason, geotechnical engineering or geologic reporting does not usually relate any environmental findings, conclusions or recommendations; e.g., about the likelihood of encountering underground storage tanks or regulated contaminants. Similarly, environmental reports are not used to address geotechnical or geologic concerns regarding a specific #07-0535 10011 Blomberg Street SW,Olympia, WA 98512 10 Phone#: (360)754-4612 Fax#: (360)754-4848 GE®TECHNICAL TESTING- LAB®RATORY VICINITY MAP �N�7^•'-f35' — ^' r _ / 4.V r 16 r' r J NJ•-F3' �r jt ` i -AREE V M1/J4Son �� 11�11U1�}3rOIN7�1'CC� :• r ao i 1 • - E _-.r :ntv Park ` Point sh Miller Pbrnt Bc w Time - --_ ti_ ' s �� walk •ter-%�' c .. 1 />l Ulhsidp t � •� Sth map OAD ell` r f _ 3.DT*.Q.iOqllo•MDdAWYa oOk W O4D% %wace Daw:USGy r--114 a 5a6:1:JkW DO&04 Dow WGW #07-0535 10011 Blomberg Street SW,Olympia, WA 98512 1 1 Phone#: (360)754-4612 Fax#: (360)754-4848 FILTER FABRIC RWREAINGTO WOE ROLLS Geotechnical USE IC TO B OR WIRE RING TO ATTACH FABRIC TO WARE M2"XI4 GAUGE WIRE FABRIC OR EQUIVALENT z Testing Laboratory ra S MAX 2%f WOOD POSTS,STANDARD OR BURY BOTTOM OF FILTER BETTER OR EQUAL ALTERNATE: MATERIAL IN S"XI T TRENCH STEEL FENCE POSTS FILTER FABRIC C Z.X2-X14 GAUGE WARE FABRIC OR EQUIVALENT Z-0' GROUND SURFACE S_T -- --------------- PROVIDE 3J4'.11?WWSHED GRAVEL BACKFILL IN TRENCH 1z AND ON BOTH SIDES OF FILTER ________________ FENCE FABRIC ON THE SURFACE S'MI __--__--------" PERFORATED PIPE TO GATHER-UPSLOPE WATER �'WEELFENE Geotechnical Services ALT.WOO FENCE POSTS FILTER FABRIC FENCE NOTES: QA/QC Services SEEP -- ---- -'- ------- 1.THFIL LE GTHOABRIC THE HALL BE BARRIER RCHASED INA TOAVODUSEOFJOINT MENJROLL TTO Testing Services ' THE LENGTH R THE BARRIER TO AVOID USE LI JOINTS.WHEN JOINTS ARE NECESSARY,FILTER CLOTH SHALL BE SPLICED TOGETHER ONLY AT ASUPPORT POST WITH AMINIMUM 64NCM OVERLAP AND SECURELY D--- -' FASTENED AT BOTH ENDS TO THE POST. - - 2.POSTS SHALL BE SPACED A MAXIMUM OF S FEET APART AND DRIVEN _- SECURELY INTO THE GROUND(MINIMUM OF 30 INCHES). 10011 Blomberg St.SW ------ 3.A TRENCH SHALL BE EXCAVATED APPROXIMATELY B INCHES WADE AND 12 Olympia,WA 98512 INCHES DEEP ALONG THE LINE OF POSTS AND UPSLOPE FROM THE BARRIER. ____-- 4.WHEN STANDARD STRENGTH FILTER FABRIC IS USED,A WIRE MESH Phone:(360)754�612 %SLOPE --------- SUPPORT FENCE SHALL BE FASTENED SECURELY TO THE UPSLOPE SIDE Fax:(360)7544848 OF THE POSTS USING HEAVY-DUTY WARE STAPLES AT LEAST i INCH LONG,TIE WIRES OR HOG RINGS.THE WARE SHALL EXTEND INTO THE _ 1$0 ,_ - _ SED IDENCE TRENCHAMINIMUM OF 4 INCHES AND SHALL NOT EXTEND MORE THAN 38 ----------"- i -- - �__ INCHES ABOVE THE ORIGINAL GROUND SURFACE. "-� '�� Date 09/28/2007 5.THE STANDARD STRENGTH FILTER FABRIC SHALL BE STAPLED OR WIRED __ A' ^ II//�� 1' V _ - TO THE FENCE AND 20 INCHES OF FABRIC SHALL BE EXTENDED Designed by: JELINEK TIGHT-LINE-DRAIIVAG�'LINE- _ __ ___ - NTO THE TRVE THE ORIGIABRIC NAL SURFACNOT E.FLIER FABRIC 38 INCHE9 ABOVE THE ORIGINAL GROUND SURFACE.FILTER FABRIC SMALL Drawn by: JELINEK NOT BE STAPLED TO THE EXISTING TREES. Checked by: LEVINE _ __ \ ---- _ S USED.THE RE MESH EN TSUPPORT TER FEBNCE MAP BE ELIMINATED,RIC AND CLOSER POST SPACING SIUCH Dwg#:09-28-07-099 _------ ----' ACASE,THE FILTER FABRIC IS STAPLED OR WIRED DIRECTLY TO THE POSTS WITH ALL OTHER PROVISIONS OR ABOVE NOTES APPLYING. --- ,'- ` TIGHT—LINE DRAINAGE LINE 0, 7.FILTER FABRIC FENCES SHALL NOT BI REMOVED BEFORE THE UPSLOPE - ,� ----- --- -��' � AREA HAS BEEN PERMANENTLY STABILIZED. _____ ---- T - 8.FILTER FABRIC FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH / 1�2 (�.� - RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL.ANY __ i ll" �V REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY. ______________________ OEN[RK EROSION CONTROL NOTES: �i 1. EROSION CONTROL MEASURES SHALL BE IN PLACE PRIOR TO THE BEGINNING OF CONSTRUCTION.THE PROJECT ENGINEER AND THE COUNTY _ �' / i ��- �--__ -------------- SHALL INSPECT AND APPROVE THE INSTALLATION OF _____- -- EROSION CONTROL MEASURES PRIOR TO BEGINNING CONSTRUCTION. i . -- ---------------------� 2.EROSION CONTROL MEASURES ARE NOT LIMITED TO THE ITEMS i ON THIS PLAN.THE CONTRACTOR IS RESPONSI8LE FOR THE INS TIES -- - NOSIL TIONTION OF ISTINGINANCEOF ALLOSED DROSION AINAGECONTROL MEASURES. OF SILTS TO OFF SITE PROPERTIES. PAUL BRONS SITE NO SILTATKN OF EXISTING SHALL LL BETAKEN TO MIGRATION PROJECT NAME: ----- SHALL BE ALLGNYED.CARE SMALL BE TAKEN i0 PREVENT MIGRATION ----- -_--_---- 3.THE CONTRACTOR SHALL MAKE DARN SURVEILLANCE OF ALL EROSION NO - CONTROLOSIONMEASU ES AND ONTROL EASURKE ANY S.THE ARY CONTRA TORSHIR$OR AODITIOI 321 EAST PANORAMA DR. TO THE EROSION CONTROL MEASURES.THE CONTRACTOR NEC PROVIDE ~_ ByTHADOIT COUNTNAL INSPSION EONTROL CTOR ES AS FAILURE SHELTON,WASHINGTON BY THE COUNTY INSPECTOR AND/OR THE PROJECT ENGINEER.FAILURE TO COMPLY WTH ALL LOCAL AND STATE EROSION CONTROL REQUIREMENTS MAY RESULT IN CIVIL PENALTIES BEING LEVIED PARCEL 320215602013 A AGAINST THE CONTRACTOR AND/OR PROJECT OWNER. NORTH 4.DURING THE WET SEASON(NOVEMBER TO MARCH)ALL DISTURBED SOILS SCALE i"-401 SHALL BE STABILIZED WITHIN 4B HOURS AFTER STOP OF WORK EROSION e C.I.-2• CONTROL MEASURES SHALL INCLUDE,BUT NOT BE LIMITED TO, RG��pWFIJIN ISM COVERING THE/ EFFECTED AREA INCLUDING SPOIL PILES WITH 1 _ PLASTIC SHEETING,STMW MATNNG,JUTE MATTING.STRAW MULCH, OR CHIPS.SEEDING OF THE DISTURBED AREAS SMALL TAKE 0 10 20 30 40 PUCECE AS AS WEATHER PERMITS. 5.ALL SEEDED OR SODDED AREAS SHALL BE CHECKED REGULARLY TO MAKE SURE VEGETATIVE COVERAGE IS COMLETE.AREAS SHALL BE REPAIRED,RESEEDED,AND FERTILIZED AS REQUIRED. S.TRACKING OF SOIL OFFSITE WALL NOT BE ALLOWED.IF ANY SOIL IS TRACKED ONTO A COUNTY STREET,IT SMALL BE REMOVED BY THE ENO OF THAT WORKING DAY.ANY FURTHER TRACKING OF MLA WALL THEN BE PREVENTED BY SWEEPING OR WASHING OF THE VEHICLES TIRES BEFORE DRIVING ON A COUNTY STREET. 7.NO MORE THAN 500 LF OF TRENCH ON A DOWNSLOPE OF MORE THAN 5 PERCENT SHALL BE OPENED AT ONE TIME. 5.EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. G.TRENCH DEWATERING DEVICES SHALL BE DISCHARGED IN A MANNER THAT WALL NOT ADVERSELY AFFECT FLOWING STREAMS.DRAINAGE SYSTEMS OR OFFSITE PROPERTIES. SCALE:1 Inch=40 feet 10.ALL STORM SEWER INLETS RECEIVING RUNOFF FROM THE PROJECT DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SENMENT{ADEN WATER WILL BE FILTERED BEFORE ENTERING THE CONVEYANCE SYSTEM, 11.ALL OFF41TE CATCH BASINS IMMEDIATELY ADJACENT TO THE SITE SHALL DISTURBED PROTECTED SHAL SILTATION. FIGURE 2 12.ALL ORKTE AREAS CONTRACTOR BE SEEDED OR RESPONSIBLE UPON COMPLETION OF COMPLETE THE CONTRACTOR SHALL BE RESPONSIBLE O ENSURE THAT COMPLETE COVERAGE A THE S ESTABLISHED AREAS IS PROVIDED 8 THAT OROVRM OF THE VEGETATION IS ESTABLISHED. SITE PLAN 13.CATCH BASINS SHALL TRAP SEDIMENT OR FILTER FABRIC MUST BE PLACED UNDER GRATE UNTIL VEGETATION IS ESTABLISHED. PLAN PLOT��R�E\Jls A �1dLi) �a - ► -vc� AAIE tIlASON COUP. L'I'M LNINING SITE PLAiJ RC)' ) 10 BE ON SITE CHANGES SV,_-.,( TO APPROVAL RECEIVED 17-- Date f� DEC 01 2006 426 W. CEDAR Sfia . - 70 --a' <— y �-�► P, r 1)0 iF i i 1 I Jvy i PALI �. 101L7w pA))J'W 1 J AMNON,