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Home My WebLink AboutGEO Assessment SPL2006-00027 - GEO Geological Review - 1/10/2007 MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 DATE: January 10, 2007 INTER-DEPARTMENTAL COMMUNICATIONS TO: Michael McSems-DCD PARCEL 42018-12-00080 FROM: Patricia C. —PW BUILDING PERMIT NUMBER: SPL2006-00027 SUBJECT: Geological Assessment NAME: Rachel Williams Hi Michael; The Geological Assessment prepared for the proposed Single Family residence 7625 West Shelton Matlock Road; Shelton has been received and reviewed by Public Works. The engineers conclude the site is stable and there is no evidence of soil erosion or deposition onsite. In preparing the site for construction as vegetation is cleared if there are concerns the Engineering firm need to be contacted. Adequate Erosion and Sediment (E&S) control features need to be implemented during land disturbing activities to protect neighboring properties and State waters from adverse stormwater runoff impacts. The migration or release of silty water or mud from the applicant's property will be considered a violation of County and State water quality protection regulations. We recommend no further action is needed unless areas of concern are unearthed during construction or damage ensues from construction. Please feel free to contact me at 619 or John Sliva ext. 724 if you have any questions regarding these comments, or if you feel any features need further discussion or attention. Sincerely, ........... ... Patricia Carroll GEOTECHNICAL TESTING LABORATORY CONTACT INFORMATION PREPARER INFORMATION GTL PROTECT NUMBER: 06-2969-11 CONTACT: BLAISE JELINEK ADDRESS: 10011 BLOMBERG STREET SOUTHWEST OLYMPIA,WASHINGTON 98512 TELEPHONE: (360) 754-4612 FACSIMILE: (360) 754-4848 EMAIL ADDRESS: GEOTESTLAB@COMCAST.NET CLIENT INFORMATION CLIENT: RACHEL WILLIAMS TELEPHONE: (360)485-2162 MAILING ADDRESS: 7652 WEST SHELTON-MATLOCK ROAD SHELTON,WASHINGTON 98584 SITE ADDRESS: 7652 WEST SHELTON-MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL NUMBER: 420181200080 GPS LOCATION: N470 13.666' W 123014.143' 10011 Blomberg Street SW, Olympia, WA 98512 2 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL 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 Ordinance 17.01.100.E4. The parcel is to be developed with a single- family residence. I k Rd \ 1 „ 1 rrin SITE CONDITIONS The subject parcel is located along an eastern facing slope, approximately 6 miles west of Shelton, Washington. The site will be accessed from a driveway of Shelton Matlock Road. The subject site is located in an area of increasing residential development. Residential parcels have been developed to the east, west, and south of the proposed building site, and the Simpson Timber Company railway borders the property to the north. The steepest natural portion of the site has slopes approaching 31 percent; the overall slope is approximately 19 percent. Soughing, rutting, or other indications.of erosion were not observed on the site. The other slopes are well vegetated with plant species common to the Northwest. Rapid stream incisionk..- was not identified at the site. A seasonal, non-fish bearing drainage crosses the parcel at a distance greater than 150 feet. _- Slope instability was not discerned onsite or on adjoining parcels. GEOLOGIC CONDITIONS ,y The Geologic Map of Washington —Northwest Quadrant(2002) = ,� _ .A has mapped the site geology as glacial till deposits (Qgt) of �'`• "'_ continental glacial origin. The report reads: % , - Till— Unsorted, unstratifled, highly compacted mixture of �r clay, silt, sand, gravel, and boulders deposited by glacial •e!. ice; may contain interbedded stratified sand, silt, and gravel. Includes part of the Vashon Dry undivided. 10011 Blomberg Street SW,Olympia, WA 98512 5 Phone#: (360)754-4612 Fax#: (360)7544848 GEOTECHNICAL TESTING LABORATORY The Soil Survey of Mason County, Washington, USDA Soil Conservation Service (1960) has mapped the site soils as Lystair sandy loam with slopes from 0 to 5 percent (Ld), Lystair sandy loam with slopes from 5 to 15 percent (Le),and Norma sandy loam with slopes from 0 to 3 percent. The Lystair sandy loam with slopes from 0 to 5 percent(Ld) is described as follows: This is the most extensive Lystair soil; it occupies gentle slopes in association with other Lystair soils. In forested areas a 1- to 2-inch layer of loose, partly decomposed needles, leaves, twigs, roots, cones, and moss is on the surface. The mineral surface soil is very friable, single-grained, brown (dark reddish-brown when moist) sandy loam, 4 to 5 inches thick. It contains firm or slightly hard, irregularly shaped aggregates that are stained by iron, and, in addition, there are a very few shot. The next 12 inches of soil has the same texture but is very friable, massive to single-grained, and slightly lighter in color. The subsoil, between 16 and 27 inches, is very friable, single-grained, reddish yellow (reddish-brown when moist) loamy sand containing no shot. Below the subsoil is the substratum, which, to a depth of 36 inches, is a massive, light yellowish- brown sand that is firm in place but breaks easily into single grains. It contains much gray and dark-gray sand. Below a depth of 36 inches, the substratum is a variegated light olive-brown and grayish-brown sand. It is massive in place but readily crumbles to loose, single-grained material Faint yellow and reddish-brown mottles occur irregularly. A few pebbles are in the profile, especially where this soil merges with the Grove or Shelton soils. The soil is medium to slightly acid and is less acid with depth. The Lystair sandy loam with slopes from 5 to 15 percent(Le)is described as follows: The surface layer of this soil is brown to light brown, and it is slightly more variable, in depth than Lystair sandy loam, 0 to 5 percent slopes. There is slightly more runoff because of stronger slopes. All layers of the soil are porous. !4 3 :J Y�A '.f. 10011 Blomberg Street SW, Olympia, WA 98512 7 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY 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. Site conditions for the proposed 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 vegetation clearing. 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. 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 Code 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. 10011 Blomberg Street SW, Olympia, WA 98512 9 Phone#: (360) 754-4612 Fax#: (360)754-4848 Mason County Review Checklist For a Geological Assessment Instructions: This checklist is intended to assist Staff in the review of a Geological Assessment. The Assessment is reviewed for completeness with respect to the Resource Ordinance. If an item is found to be not applicable, the report should explain the basis for the conclusion. The Assessment is also reviewed for clarity and consistency. If the drawings, discussion, or recommendations are not understandable, they should be clarified. If they do not appear internally consistent or consistent with the application or observations on site, this needs to be corrected or explained. If resolution is not achieved with the author, staff should refer the case to the Planning Manager or Director. Applicant's Name: Joey Harrison & Rachael Williams Permit# BLD2008-01095 Parcel#42018-12-90081 Date(s)of the Document(s) reviewed: Geotechnical Assessment 10/9/08 -0 4 � rn (1) A discussion of geologic conditions in the general vicinity of the proposed development,with geologic unit designation based m rn on referenced maps. -0 OK?Yes Comment: Page 7 r —1 (2) (a)A discussion of the ground water conditions at the site, "n Z OK? Yes Comment: Page 8 — (b) A discussion of the estimated depth to water r OK? Yes Comment: Page 8 m rn (c) A discussion of the quantity of surface seepage OK? Yes Comment: Page 6 (d) A discussion of the upslope geomorphology OK? Yes Comment: Page 6 (e) A discussion of location of upland waterbodies and wetlands. OK? Yes Comment: Page 6 (3) The approximate depth to hard or dense competent soil, e.g. glacial till or outwash sand. OK? Yes Comment: Page 8 (4) A discussion of any geomorphic expression of past slope instability(presence of hummocky ground or ground cracks, terraced topography indicative of landslide block movement, bowed or arched trees indicating downslope movement, etc.). OK? Yes Comment: Page 8 (5) A discussion of the history of landslide activity in the vicinity, as available in the referenced maps and records. OK? Yes Comment: Pages 8 (6) An opinion on whether the proposed development is within the landslide hazard area or its associated buffer or setback and the potential for landslide activity at the site in light of the proposed development. OK? Yes Comment: Page 9 (7) A recommendation by the preparer whether a Geotechnical Report should be required to further evaluate site conditions and the proposed development of the subject property. OK? Yes Comment: Page 9 (8) If the presence of a hazard is determined within 300 feet of the proposed development, then the following are delineated on a geologic map/site map: (a) the area of the proposed development, OK? Yes Comment: No Hazard Page 1 of 2 Form Effective June 2008 (b) the boundaries of the landslide hazard area (top, both sides, and toe), OK? NA Comment: Not in a LHA or buffer (c) the associated buffers (top, both sides, and toe) OK? NA Comment: Not in a LHA or buffer (d) building or other setbacks (top, both sides, and toe). OK? NA Comment: Not in a LHA or buffer (9) A site map drawn to scale showing the property boundaries, scale, north arrow, and the location and nature of existing and proposed development on the site. OK? Yes Comment: Figure 2 Are the Document(s)signed and stamped? Yes Type and #of License: Licensed Geologist-2439 If not approved, what is the next action/recommendation for further action? Reviewed by Tammi Wright on 10/20/08 Time spent in review: 1.5 hours SECOND REVIEW/ UPDATE: Reviewed by on Time spent in second review: THIRD REVIEW/ UPDATE: Reviewed by on Time spent in third review: Disclaimer: Mason County does not certify the quality of the work done in this Geological Assessment Page 2 of 2 Form Effective June 2008 GEOLOGICAL ASSESSMENT 7654 W MATLOCK ROAD SHELTON.) WASHINGTON PREPARED FOR RACHEL WILLIAMS BY GEOTECHNICAL TESTING LABORATORY, INC. OLYMPIA, WASHINGTON OCTOBER 9, 2008 GEOTECHNICAL TESTING LABORATORY CONTACT INFORMATION PREPARER INFORMATION GTL PROJECT NUMBER: 08-0317 CONTACT: CURTIS D.CUSHMAN ADDRESS: 10011 BLOMBERG STREET SOUTHWEST OLYMPIA,WASHINGTON 98512 TELEPHONE: (360)754-4612 FACSIMILE: (360)754-4848 EMAIL ADDRESS: GEOTESTLAB@COMCAST.NET CLIENT INFORMATION CLIENT: WILLIAMS,RACHEL TELEPHONE: (360)485-2162 BILLING ADDRESS: 7652 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 SITE ADDRESS: 7654 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL: 420181290081 GPS LOCATION: N47°13135.2711 W123o 13157.6111 10011 Blomberg Street SW,Olympia,WA 98512 2 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY SCOPE OF UNDERSTANDING WILLIAMS,RACHEL 7652 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 RE: GEOLOGIC ASSESSMENT 7654 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL#420181290081 N47013'35.27" W123013'57.61" Ms. Williams: As per your request,we have conducted a geological assessment and analysis for the above-mentioned parcel. 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, resteel), 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. Respectfully Submitted, GEOTECHNICAL TESTING LABORATORY 0{ Wash�� y o v Engineering Geologist 2439 Curtis D Cushman o�Sed G eO\o Senior Engineering Geologist JI S D7 .'d CUSHMAN 10011 Blomberg Street SW,Olympia,WA 98512 3 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY TABLE OF CONTENTS CONTACT INFORMATION.......................................................................................................................................................2 SCOPE OF UNDERSTANDING.................................................................................................................................................3 TABLEOF CONTENTS..............................................................................................................................................................4 PURPOSE........................................................................................................................................................................................5 SITECONDITIONS...........................................................................................................................................................................6 GEOLOGICCONDITIONS.................................................................................................................................................................7 SITESOILS.....................................................................................................................................................................................7 GROUNDWATERCONDITIONS.........................................................................................................................................................8 DEPTHTO COMPETENT SOIL..........................................................................................................................................................8 PASTSLOPE INSTABILITY...............................................................................................................................................................8 HISTORY OF LANDSLIDE ACTIVITY................................................................................................................................................8 POTENTIAL FOR LANDSLIDE ACTIVITY...........................................................................................................................................8 RECOMMENDATIONS......................................................................................................................................................................9 REPORT LIMITATIONS AND GUIDELINES FOR USE..........................................................................................................................9 READTHESE PROVISIONS CLOSELY...............................................................................................................................................9 WELLLOGS.................................................................................................................................................................................10 VICINITYMAP..............................................................................................................................................................................12 10011 Blomberg Street SW,Olympia,WA 98512 4 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY PURPOSE This report summarizes the results of our geotechnical consulting services for the proposed garage construction. The report has been commissioned by Rachel Williams. The parcel (6.95 acres) is located off the West Shelton- Matlock road in Shelton, Washington. (See site aerial photos below). The site is approximately 6.5 miles west- northwest of Shelton, Washington. The site will be accessed from a private easement located at the adjacent parcel south of the subject site. IRV' ' .. -ram • 4�Lt a" � �1, Vol lie • eo .R 1 Terraserver Aerial Image Mason County GIS Aerial Image Our understanding of the project is based on our discussions with the client. We understand that the parcel is to be developed with a garage. Current land use includes a residential building and a detached garage is proposed. The existing septic drain field is located on the south east portion of the parcel and is approximately 55 feet away from the existing house. The approximate layout of the site is shown on the Site Plan, Figure 2. The steepest slope measured onsite was approximately 33 percent in a road cut in the southeast section portion of the project site. This slope is located to the southeast of the existing building and proposed construction. A seasonal stream(Type F)runs through the property and the approximate center line of the stream has been located in the site plan (attached at the end of this report as Figure 2). A 165 feet setback is required for the proposed construction from the Type F stream and has been clearly marked on the site plan. Therefore, Mason County requires that a geological assessment be prepared in accordance with the Critical Areas Ordinance. 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 15 percent (8.5 degrees) and 40 percent (21.8 degrees) will require a Geological Assessment, and may further require a Geotechnical Report upon the findings of the assessment. 10011 Blomberg Street SW,Olympia,WA 98512 5 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY SITE CONDITIONS At the project site, exploration was conducted on September 21, 2008 by Vijay Chaudhary. The purpose of the site inspection was to physically observe the property and adjacent properties to identify geologic and geographic conditions. Photographs and field observations were documented. Site-specific features were mapped, and vegetation noted. The site is well vegetated with plants common to Northwest except in the cleared areas where grass and shrubs are present. The site consists of a residential building. The site is well vegetated except for the cleared portion where the proposed garage and the existing house are located. The site has a predominant southeastern exposure and is well vegetated. Site elevations range from approximately 280 to 320 feet. The drainage is dominated by a stream channel trending roughly east-west across the center of the property which discharges to the west. The site plan is included as Figure 2 at the end of this report. No evidence of active surface erosion was observed. No surface water flow was observed onsite outside of the stream. No ponding of water was observed throughout the site. Slumping and sloughing was not observed throughout the site. No evidence of deep-seated slope instability was observed onsite. No seeps or springs were observed onsite. Onsite trees were observed to be straight and vertical. The closest mapped wetland is located approximately 1500 feet southeast of the subject site. The closest upland water body specified as Type F seasonal stream by Mason County located north of the proposed structure. The structure will be constructed with a 165 feet setback from the Type F stream. None of the water bodies will impact the construction and the construction,with adequate protection measures, such as silt fences,will not affect the streams. The site is very well vegetated with species common to northwest. r _ t -t Picture showing existing building and the vegetation 10011 Blomberg Street SW,Olympia, WA 98512 6 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY GEOLOGIC CONDITIONS The Geologic Map of Shelton 1:100,000 Quadrangle, Washington (2003) by Robert L. Logan has mapped the geology as Proglacial and Recessional Outwash, Late Wisconsinan (Pleistocene) (Qgo) of continental glacial origin. The report reads: Proglacial and recessional outwash, late Wisconsinan (Pleistocene)— Typically poorly to moderately sorted, rounded gravel and sand with localized coarser- and finer-grained constituents; lithologically varied mixture of mostly northern provenance clasts, especially containing granitic and metamorphic rocks that identify the unit as being deposited by the Puget lobe of the Cordilleran glacier; also contains varying amounts of locally derived Crescent Formation basalt, and in the Mox Chehalis Creek valley, central Cascade Range— derived andesitic clasts; typically shades of gray where fresh or brown where stained especially in proglacial and morainal areas; buff staining near the ground surface;fine sand, silt, and clay constitute local overbank sediments having relatively poor permeability or deltaic foreset bedding along north sides of valleys with higher permeability; porous and permeable enough to yield small to moderate quantities of groundwater; very poorly consolidated to loose; moderately to well-rounded clasts; mostly unweathered with rare weathered reworked clasts; thickness varies and is not well known; most commonly occupies outwash channels scoured into or through till. Geologic Map of Washington— Southwest Quadrant (1987) by Walsh et al has mapped the site geology to be Qgo, (Undifferentiated glacial drift) of continental glacial origin. The description reads, Undifferentiated glacial drift—Clay, silt, sand, and gravel; contains moraines and mixtures of till and outwash not separately mappable. Consists of part of the Vashon Drift The site appears to be in the boundary region of Qgt and Qgo in the printed literatures as referenced above. SITE SOILS The Soil Survey of Mason County, Washington, USDA Soil Conservation Service(1960)has mapped the site soils as Lystair sandy loam with slopes from 0 to 5 percent (Ld) and Lystair sandy loam with slopes from 5 to 15 percent(Le). The Lystair sandy loam with slopes from 0 to 5 percent(Ld)is described as follows: This is the most extensive Lystair soil; it occupies gentle slopes in association with other Lystair soils. In forested areas a 1- to 2-inch layer of loose, partly decomposed needles, leaves, twigs, roots, cones, and moss is on the surface. The mineral surface soil is very friable, single-grained, brown (dark reddish-brown when moist) sandy loam, 4 to S inches thick. It contains firm or slightly hard, irregularly shaped aggregates that are stained by iron, and, in addition, there are a very few shot. The next 12 inches of soil has the same texture but is very friable, massive to single-grained, and slightly lighter in color. The subsoil, between 16 and 27 inches, is very friable, single-grained, reddish yellow (reddish-brown when moist) loamy sand containing no shot. Below the subsoil is the substratum, which, to a depth of 36 inches, is massive, light 10011 Blomberg Street SW,Olympia,WA 98512 7 Phone#: (360)754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY yellowish-brown sand that is firm in place but breaks easily into single grains. It contains much gray and dark-gray sand. Below a depth of 36 inches, the substratum is variegated light olive- brown and grayish-brown sand. It is massive in place but readily crumbles to loose, single- grained material Faint yellow and reddish-brown mottles occur irregularly.A few pebbles are in the profile, especially where this soil merges with the Grove or Shelton soils. The soil is medium to slightly acid and is less acid with depth. The Lystair sandy loam with slopes from 5 to 15 percent(Le) is described as follows: The surface layer of this soil is brown to light brown, and it is slightly more variable, in depth than Lystair sandy loam, 0 to S percent slopes. There is slightly more runoff because of stronger slopes. All layers of the soil are porous. GROUNDWATER CONDITIONS Groundwater seepage was not observed at or near the proposed building location. Wetland vegetation was not observed at or near the proposed building location. Research of the local wells indicates that depth to static groundwater is relatively shallow and ranged from 10 feet to 14 feet below ground surface for well logs reporting the static water level. DEPTH TO COMPETENT SOIL The building location is upon a site where the Lystair sandy loam has been removed to the underlying Qgo. This material is liable to be loose and unsuitable for construction unless adequately watered and compacted. PAST SLOPE INSTABILITY Surrounding the subject site, trees were observed to be straight and vertical. No indication of past instability was discerned at the site. At the site the slopes are between 10 and 33 percent and no signs of instability were observed. HISTORY OF LANDSLIDE ACTIVITY No historical landsliding was observed during our site investigation onsite or near the subject parcel. At the proposed building location,the slope is compact and dense. Onsite trees are straight and vertical. POTENTIAL FOR LANDSLIDE ACTIVITY This site has no indication or record of old or recent landslide activity. Even though natural slopes approach near 33 percent,the potential for landslide activity is not a concern for the proposed development. 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 to D. Site class C is a very stiff soil or soft rock and site class D is a stiff soil. 10011 Blomberg Street SW,Olympia, WA 98512 g Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY 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. 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. We recommend verification of site compaction before the footing is placed to assure the soil is suitable for construction. 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 assessment may not be fully applicable. 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 Code 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 Rachel Williams and her authorized agents for the proposed lot short subdivision 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. 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. 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 project. 10011 Blomberg Street SW,Olympia,WA 98512 9 Phone#: (360)754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY WELL LOGS D. ninthoriginal f E FirstO"Copy with WATER WELL REPORT 5t•rt Gb.,o. o/� S � Department of Ecob9y Sa-md Copy-Own-'a Copy STATE OF WASHINGTON Third Copy-Dri(lar'a Copy Water RIpM Permit No. N L O (1) OWNER: Ns,ma Address CL QI (2) LOCATION OF WEL1: country ./(-SAI'� Y - SC L A/N/ry s.c !S T._20.,..R- wu- (2s) STREET ADODRESS OF WELL(or nas,reef addraes) CcS G! (3) PROPOSED USE: omeatic Industrial ❑ Municipal❑ (10) WELL LOG or ABANDONMENT PROCEDURE DESCRIPTION 0 Irrigation y ❑ DeWater Tat Well ❑ Other ❑ Fortnation: Describe by color, chairaet-, sae of material and atrtratlas. and show thickness,Of.dupers and the kind and nalvrs of the material U seen suet.+Pawstr.ted, (4) TYPE OF WORK:0111er•.timber of wa With at Mast one satry for each chanow of wo met on. (It wars than one} � teATataAL FROM To O Abandoned❑ New well 19"Method: Dug ❑ Bored ❑ Deepaned ❑ Cable 9Z,- Driven ❑ )r Reconditioned❑ Rotary❑ Jetted ❑ V O a=t (5) DIMENSIONS: Diameter of welt G IneMs. Drllled—!!V _feel. Depth of cofripleled well G (8) CONSTRUCTION DETAILS: F _ � Casing Installed: �_• t)rsm.ham t2-R-to n. _- weleed d Lin TMesdedcled L� � [] OWe.horn R.to R. V L PerfOratlOM: VN NO O Type of parMntor used a 312E of p-fcratlon, in.by In. r- perforations from ft.to fl. f0 R parfontb.a Iron N-to h. ~' per foratbM from fl.to R. R Screens: Yea Ho 41 Msn.fact.r-•.Name M Type Model No _ DWn. Slot sae n-to AJ •.+ ..,e�t� . � Dlam. SIe1 sae fm h.1—ft. LGravel packed: Vsa NO tilde Of gavel C L 2' (Q Cirsvel placed from �/ R.to R. Surfaces al: Yea LJ No❑/ To wf'att depth? fit R. T 7� t ^ Mat&"I used in seat �� z DidanYstratscomainumlaablawatarl Ves❑ No k - H Typ.of w-arl Depth of strat- _ - a Method I seslkr9 atrats off a (T) PUMP: M.nufaOturare Name --- -- Typs,-. H.P _ 0 (B) WATER O LEVELS: La n d- el«atlon .bow masn aw Mwl R. O Static lewi .{(� ft-below top of Well D.le (a Anesian pressor. lbs.par epwn Inch Data Artesian water is controlled by I.- O Work-ariad ... 79. C ed .19 (9) WELL TESTS: Drs,wdown Is• I wale.Ieve1410--d below Static lswt F+ was a pump test made?Yea❑ No1J II yes,by whom? WELL CONSTRUCTOR CERTIFICATION: Yiesa: gal.lmin.with ft.drawdown after himhimI constructed andror accept responsibility for construction of this welt, On l..l .. Materials used and the information risporled abovand Its compliance with all Washington well e tru f e o my best L - .. .. (7f Recovery data(time taken ee zero when pump turned Off))(water leveltnsaaend knowledge and belief. CL from wall top to water IsvM) �r 7vna WateryrN Water r La T Laol Tim. Wetw NAME /r•`L-i / rag .w lA/Y�/ /./I•//I/�1� Steel.wino,ca carwonsnoNl On PRIIIT) fS► - = Address Date of tees (Signed) Licence No-JJZsTaL B■der teat. :%n g.l./min.with 'I ft.d ewd&-aft-I hrs. (wE L6 Contractor's Airtesf wL l min.with Mom Set at ft.for Ms. fRi }f °�J�1 W4)nR.K� Date Artesian flow 9A.m. Data Temperature of water_Waa a chemical snayala macs?Yp❑ No 0- (USE ADDITIONAL SHEETS IF NECESSARY) E V05e I-20 (10197) -Iris allow 10011 Blomberg Street SW, Olympia, WA 98512 10 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY FIW Original arid First CO"""" DaPeranent of EeWopy WATER WELL REPORT UNIQUE WELL I.D. 4 j second Cow—Owners Copy STATE OF WASHINGTON Third Copy—Driller's Copy vye/sr Right pwnal No. . (1) OWNER: name --Ads°°" l (2) LOCATION OF WELL: County vat sew Sac T�N.,R M i (2a) STREET ADDRESS OF WELL(or raw is ) (3) PROPOSED USE: Domestic Industrial C Muni cipal O (10) WELL LOG or ABANDONMENT PROCEDURE DESCRIPTION Irrigation Formation:DeserEe ay odor.d,areeter.size of malarial and structure and slow Mdcrms of aquaere ❑ DBWatr TaG WON O tJUlr end the kind end nature d late material in each stratum penetrated.with r least one antry for seep Owner's number of well Chiba o1 iforma0oti - (4) TYPE OF WORK: in more than one) _ 1UlTEN1AL FrsOM TO i Abandoned fl New well .�} Method:Dub Bored❑ Deepenedtj Ikwen❑ Reconditioned❑ Rotary' Jailed❑ I (5) DIMENSJOW: Diameler o1 well s I Dried vIGL seat. Depth of conwbled mil i9 el : i (6) CONSTRUCTION DETAILS: Caalno IroWled: -- — Diem,h°m ..h.to .._rt i ided � mam.from� h-to— Liner ft. Threaded El Diem. h- R r.r Is perforstlona: Yes❑ No _� G i Y L4 p Type of perforator used { SIZE of perforations in.by n. FEB i prforstiore from It-to R I perforations from ft.b rt. t:SUUfCBs Pro ram perforations fromu rt.10 rt• y Bcreeae: Yea a❑ Mew is Name i Type Model NO, . � Ola SI" W size Irom�__h.b� fl Diem.__slot size tram _fl.b 1L Gravel packed: Yes❑ No❑ Size of gravel Gravel placed from fL to h. Burfabe lost: Yes NO❑ Torwhat depth? rt. Malarial used in goal Did any strata conten unusable water+ Yes❑ NoQk— .. . Type of wstar? Depth of strata—- - I - I Mehod at sealing strata oM I (7) PUMP: Alartutacturer's Name _. Type: N.P. (B) WATER LEVELS: tand-surbove a elevation work Slanted .19 ComplatW t D— i I abo mean"se n a bvei_�. sbnc bw•I /(1 _ —e'below top d wall WELL CONSTRUCTOR CERTIFICATION: Artesian pressure last.par square den Dab Arles an wabr is contromo try - - ." I constructed and/or accept reaponeaAty for constrlk tbn of this well,and ins i ap.valvii.atc. compliance with all Vlfashi igtot well construct on standards.materials used and the information reporled above are true to my best knowledge and beliel. (9) W ELL TESTS: Drawdown Is amount water level is lowered below static level I Was a.pump test made?Yes❑ Na U If yes,by whom? v* r/'i Yeld: gall min-with _h.drawdown alter his. FlMiL iXi '"tn 1—U r WW*q ^ ^ Add ! G . ,• •• ^ (Signer) _License Recovery data(time taken as zero when Wimp turned oQ(wabr level measured from well top to water level) Time Water Level Time, Water uniel Time Wale Level Contractor's '�/(� Date�' Xl—' ,19 (USE ADDITIONAL SHEETS IF NECESSARY) Dna��of//y�JJqgsst �y NOW°Bat=gal-I n"r'with wdown f Ecology is an Equal Opportunity and Affirmative Action employer.For spe- Ainest gaL.imin.with stem set at _h.for__ Ivs, d so . al accommodation needs,contact the Water Resources Program at(206} Artesian Clow py.m Dam Temperature at water Was a chemical analysis mach? Yas❑ N 407-6600.The TDD number is(206)407-6006. ECY 060 1 20(499) 10011 Blomberg Street SW, Olympia, WA 98512 11 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY VIQNITY MAP,-..__._ N47'-14:5'- 7 2 + oper v. OM N47;T-jS-,7-- 13 L 0 7.1.3. ale N47 1-.- 4L U-7�- 7' too 4b .2� N47-it-2!6 k L4 70 ,�—�� --.,- 10011 Blomberg Street SW,Olympia, WA 98512 12 Phone#: (360)754-4612 Fax#: (360)754-4848 CONTOURS ARE BASED ON SITE RECONNAISSANCE C RWIMATERIALRING WIDE ROLLS AND MASON COUNTY GIs WEBSITE. ,OR WIRE RING TO ATTACH IRE F WIRE Ge o to c h n is al FABRIC'OR EQUIVALENT Testing FACE T, Laboratory 5 MAX BURY BOTTOM OF FILTER MATERIAL IN S'X12'TRENCH C 7� 5.0. Qgo IT 8'MIN 2'XP WOOD POSTS ALT:STEEL FENCE POSTS Geotechnical Services UT TO QA/QC Services U EFJOINTCONTINUOUS ROLL JOINT BE OF JOINTS.MEN JOINTS Testing Services SPLICED TOGETHER ONLY AT OVERLAP AND SECURELY 320E FEET APART ANDDRIVEN 3C INCHES). IMATELYSINCHESIMDEAND12 10011 Blomberg St.SW AND UPSLOPE FROM THE BARRIER. Olympia,WA 98512 �✓ tIC IS USED,A WARE MESH Phone:(360)754-4612 M CURELY TO THE UPSLOPE SIDE LO STAPLES AT LEAST,INCH Fax:(360)754-4848 RE SHALL EXTEND INTO THE 1 ILL NOT EXTEND MORE THAN 36 l RFACE, 300, ,SHALL BE STAPLED OR WIRED Date: 10/09/08 SHALL BE EXTENDED )T EXTEND MORE THAN 35 Designed by:VJ JRFACE.FILTER FABRIC SHALL Drawn by: VJ Qgo ,NDCLOSERPOSTSPACINGIS Checked by: CDC MP BE ELIMINATED,IN 5UG1 D #: 10-09-08-054 IR WIRED DIRECTLY TO THE yy 9 ASOVE NOTES APPLYING. MOVED BEFORE THE UPSLOPE -':D. TED IMMEDIATELY AFTER EACH 40LONGED RAINFALL.ANY :DIATELY. IN PLACE PRIOR TO THE / )JECT ENGINEER AND THE COUNTY ILLATION OF y I BEGINNING CONSTRUCTION. EASONAL STREAM C.L. _IMMTED TO THE ITEMS �� 'ONSMLE FOR THE '--------' _EROSION CONTROL MEASURES. PROJECT NAME: DRAINAGE FACILITIES EN TO PREVENT MIGRATION WILLIAMS SITE .+ VEILLAHCEOF ALL EROSION 7854 W SHELTON-MATLOCK ESSARY REPAIRS OR ADDITIONS ROAD rHE C�S ASONTRACTOR SHALL PROVIDE PROJECT INEE NECESSARY SHELTON,WASHINGTON PROJECT ENGINEER.FAILURE PR(R�I��« PARCEL 420181290081 N TIES BEING LEVIED JECTOMNER. - )MARCH)ALL DISTURBED SOILS ,FTER STOP OF WORK EROSION ----IT Nor BE uMI ED ro, RBVISI0115: JG SPOIL PILES WITH MATTING,STRAW MULCH, -I--�-�- IBED AREAS SHALL TAKE E CHECKED REGULARLY S COMLETE.AREAS SHALL BE S REQUIRED. ALLOWED.IF ANY SOIL IS ALL BE REMOVED BY THE END RACKING OF MUD WILL THEN JG OF THE VEHICLES TIRES )OWNSLOPE OF MORE THAN S ON THE UPHILL SIDE OF TRENCHES. 3 DISCHARGED IN A MANNER THAT WILL AMS,DRAINAGE SYSTEMS OR SCALE:1 Inch=100 feet UNOFF FROM THE PROJECT WRING 10 THAT SEDIMENTIAOEN WATER IE CONVEYANCE SYSTEM. .Y ADJACENT TO THE SITE OR SODDED UPON COMPLETION R FIGURE 2 RESPONSIBLE ENSURE THAT 9D AREAS 19 PROVIDED S THAT _ISII SITE PLAN E R FILTER FABRIC MUST BE )N IS STABUSNED. GEOLOGICAL ASSESSMENT 7652 WEST SHELTON-MATLOCK ROAD SHELTON, WASHINGTON PREPARED FOR RACHEL WILLIAMS BY GEOTECHNICAL TESTING LABORATORY OLYMPIA, WASHINGTON DECEMBER 6, 2006 DEC 0 8 2006 GEOTECHNICAL TESTING LABORATORY CONTACT INFORMATION IF PREPARER INFORMATION i GTL PROJECT NUMBER: 06-2969-11 CONTACT: BLAISE JELINEK ADDRESS: 10011 BLOMBERG STREET SOUTHWEST OLYMPIA,WASHINGTON 98512 TELEPHONE: (360)754-4612 FACSIMILE: (360)754-4848 EMAIL ADDRESS: GEOTESTLAB@COMCAST.NET CLIENT INFORMATION i CLIENT: RACHEL WILLIAMS TELEPHONE: (360)485-2162 MAILING ADDRESS: 7652 WEST SHELTON-MATLOCK ROAD SHELTON,WASHINGTON 98584 SITE ADDRESS: 7652 WEST SHELTON-MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL NUMBER: 420181200080 GPS LOCATION: N47013.666' W 123014.143' i 10011 Blomberg Street SW, Olympia, WA 98512 2 Phone#: (360)754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY SCOPE OF UNDERSTANDING RACHEL WILLIAMS 7652 WEST SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 RE: GEOLOGICAL ASSESSMENT SITE INFORMATION: 7652 WEST SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 GPS LOCATION: N47013.6661 W123014.1431 PARCEL NUMBER: 420181200080 Ms. Williams: As per your request, we have conducted a geological assessment and analysis for the above-mentioned parcel. A site reconnaissance was performed on December 5, 2006. 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 (compaction, asphalt, concrete), and inspection (rebar, epoxy) 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. Respectfully Submitted, r GEOTECHNICAL TESTING LABORATORY to r0'� � 1 aA,# / Harold Parks,L.G.,L.E.G. Senior Engineering Geologist tIQ1fl�flhfQ Geologist 827 HAROLD PA" 10011 Blomberg Street SW,Olympia,WA 98512 3 Phone#: (360)754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY TABLE OF CONTENTS CONTACTINFORMATION...................................................................................................................... 2 SCOPEOF UNDERSTANDING................................................................................................................ 3 TABLEOF CONTENTS............................................................................................................................. 4 PURPOSE ....................................................................................................................................................... 5 SITECONDITIONS.......................................................................................................................................... 5 GEOLOGICCONDITIONS................................................................................................................................. 5 GROUNDWATERCONDITIONS........................................................................................................................ 8 DEPTHTO COMPETENT SOIL.......................................................................................................................... 8 PASTSLOPE INSTABILITY.............................................................................................................................. 8 HISTORY OF LANDSLIDE ACTIVITY................................................................................................................ 8 POTENTIAL FOR LANDSLIDE ACTIVITY.......................................................................................................... 8 RECOMMENDATIONS..................................................................................................................................... 9 VICINITYMAP............................................................................................................................................. 10 10011 Blomberg Street SW, Olympia, WA 98512 4 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL 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 Ordinance 17.01.100.E4. The parcel is to be developed with a single- family residence. i E A4a 1H i 7J k Rd x � _ I 1 i SITE CONDITIONS The subject parcel is located along an eastern facing slope, approximately 6 miles west of Shelton, Washington. The site will be accessed from a driveway off Shelton Matlock Road. The j subject site is located in an area of increasing residential development. Residential parcels have been developed to the east, west, and south of the proposed building site, and the Simpson Timber Company railway borders the property to the north. The steepest natural portion of the site has slopes approaching 31 percent; the overall slope is approximately 19 percent. Soughing, rutting, or other indications of erosion were not observed on the site. The other slopes are well vegetated with plant species common to the Northwest. Rapid stream incision was not identified at the site. A seasonal, non-fish bearing , drainage crosses the parcel at a distance greater than 150 feet. Slope instability was not discerned onsite or on adjoining parcels. GEOLOGIC CONDITIONS The Geologic Map of Washington —Northwest Quadrant (2002) +A has mapped the site geology as glacial till deposits (Qgt) of _ L . �`•�+= > continental glacial origin. The report reads: , Till— Unsorted, unstratified, highly compacted mixture of nor► clay, silt, sand, gravel, and boulders deposited by glacial ice; may contain interbedded stratified sand, silt, and gravel. Includes part of the Vashon Drift undivided. 10011 Blomberg Street SW,Olympia, WA 98512 5 Phonb#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY The Geologic Map of the Shelton 1:100,000 Quadrangle, Washington, by Logan (2003) describes the site as late Wisconsinan(Pleistocene). The glacial till(Qgt) is described as: 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. The Geologic Map of Southeastern Mason County, Washington, USGS Water-Supply Bulletin 29 by Noble and Molenaar (1970) describes the site as Recessional Outwash. The Recessional Outwash (Qvr) is described as follows: Recessional outwash:gravel with some sand, silt, and clay. Most gr ay. Mostly poorly sorted and loose, but has deltaic bedding along north sides of some valleys. Overlies till in depression on drift plains. Where it occurs in sufficient thickness below local water table, it yields small to moderate quantities (50—250 gpm)of groundwater. The Geologic Map of the South Half of the Shelton and South Half of the Copalis Beach Quadrangles, Washington(1987)by Logan maps the site as Vashon Outwash(Qov). The unit is described as, Vashon Outwash — Recessional and proglacial stratified, relatively unweathered sand and gravel;locally contains silt and clay. aG k H 10011 Blomberg Street SW,Olympia, WA 98512 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY The Soil Survey of Mason County, Washington, USDA Soil Conservation Service (1960) has mapped the site soils as Lystair sandy loam with slopes from 0 to 5 percent (Ld), Lystair sandy loam with slopes from 5 to 15 percent (Le), and Norma sandy loam with slopes from 0 to 3 percent. The Lystair sandy loam with slopes from 0 to 5 percent(Ld)is described as follows: This is the most extensive Lystair soil; it occupies gentle slopes in association with other Lystair soils. In forested areas a 1- to 2-inch layer of loose, partly decomposed needles, leaves twigs, roots P Y P g , > cones, and moss is on the surface. The mineral surface soil is very friable, single-grained, brown (dark reddish-brown when moist) sandy loam, 4 to 5 inches thick It contains firm or slightly hard, irregularly shaped aggregates that are stained by iron, and, in addition, there are a very few shot. The next 12 inches of soil has the same texture but is very friable, massive to j . single-grained, and slightly lighter in color. The subsoil, between 16 and 27 inches, is very friable, single-grained, reddish yellow (reddish-brown when moist) loamy sand containing no shot. i Below the subsoil is the substratum, which, to a depth of 36 inches, is a massive, light yellowish- brown sand that is firm in place but breaks easily into single grains. It contains much gray and dark-gray sand. Below a depth of 36 inches, the substratum is a variegated light olive-brown and grayish-brown sand. It is massive in place but readily crumbles to loose, single-grained material Faint yellow and reddish-brown mottles occur irregularly. A few pebbles are in the profile, especially where this soil merges with the Grove or Shelton soils. The soil is medium to slightly acid and is less acid with depth. The Lystair sandy loam with slopes from 5 to 15 percent(Le)is described as follows: The surface layer of this soil is brown to light brown, and it is slightly more variable, in depth than Lystair sandy loam, 0 to S percent slopes. There is slightly more runoff because of stronger slopes. All layers of the soil are porous. ,s Ilk kw ti aYl` 10011 Blomberg Street SW,Olympia, WA 98512 7 Phone#: (360)754-4612 Fax#: (360)754-4848 ` GEOTECHNICAL TESTING LABORATORY GROUNDWATER CONDITIONS Groundwater seepage was not observed at or near the proposed building location. Wetland vegetation was not observed at or near the proposed building location. Research of the local wells indicates that depth to static groundwater is relatively shallow and ranged from 2.5 feet to 20 feet below ground surface for well logs reporting the static water level. f DEPTH TO COMPETENT SOIL The proposed building location is underlain by well-cemented Vashon glacial till. Competent soil can be expected approximately 12 to 20 inches below the existing ground surface. PAST SLOPE INSTABILITY Surrounding the proposed building location, trees were found straight and vertical. No indication of past instability was discerned at the proposed building location or throughout the site. Adjoining parcels display similar signs of stability as the subject site. i HISTORY OF LANDSLIDE ACTIVITY No historical landsliding was observed during our site investigation onsite or near the subject parcel. At the proposed building location,the slope is compact and dense. Onsite trees are straight and vertical. POTENTIAL FOR LANDSLIDE ACTIVITY This site has no indication or record of old or recent landslide activity. Even though natural slopes approach 25 percent,the potential for landslide activity is not a concern for the proposed development. 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 to D. Site class C is a very stiff soil or soft rock and site class D is a stiff soil. 10011 Blomberg Street SW,Olympia,WA 98512 8 Phone#: (360) 754-4612 Fax#: (360)754-4848 1 GEOTECHNICAL TESTING LABORATORY 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. Site conditions for the proposed 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 vegetation clearing. 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. 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 Code 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. i I j 10011 Blomberg Street SW, Olympia, WA 98512 9 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY VICINITY MAP t.i100 dP i i t J o 77 -R�nche «'Tla`!ffis+P operty.1 _ Dayton FA 13 'Al q Y,...._ 711 ale --r! 4 \4b � .�' , `,.�' •-� \ 2 !.r t ar (7 r �. ra7yrrs ;. _ it Ar 10011 Blomberg Street SW, Olympia, WA 98512 10 Phone#: (360) 754-4612 Fax#: (360)754-4848 A Form Effective June 2008 Mason Countv Department of Community Development Submittal Checklist For a Geological Assessment Instructions: This check list must be submitted with a Geological Assessment and completed, signed, and stamped by the licensed professional(s) who prepared the Geological Assessment for review by Mason County pursuant to the Mason County Resource Ordinance. If an item found to be not applicable, the report should explain the basis for the conclusion. Applicant/Owner: Rachel Williams Parcel #:420181290081 Site Address: 7654 W Shelton Matlock Road Shelton, Washington 98584 (1) A discussion of geologic conditions in the general vicinity of the proposed development, with geologic unit designation based on referenced maps. Located on page(s)7 (2) (a) A discussion of the ground water conditions at the site, Located on page(s)8 (b) A discussion of the estimated depth to water Located on page(s) 8 (c) A discussion of the quantity of surface seepage Located on page(s) 6 Jy(33:) 'M gZb s�oz(d) A discussion of the upslope geomorphology P T 130 Located on page(s) 6 a 3A 1 3 0 3 8 (e) A discussion of location of upland water bodies and wetlands. Located on page(s) 6 Form Effective June 2008 (3) The approximate depth to hard or dense competent soil, e.g. glacial till or outwash sand. Located on page(s) 8 (4) A discussion of any geomorphic expression of past slope instability (presence of hummocky ground or ground cracks, terraced topography indicative of landslide block movement, bowed or arched trees indicating down slope movement, etc.) Located on page(s) 8 (5) A discussion of the history of landslide activity in the vicinity, as available in referenced maps and records. Located on page(s) 8 (6) An opinion on whether the proposed development is within the landslide hazard area or its associated buffer or setback and the potential for landslide activity at the site in light of the proposed development. Located on page(s)9 (7) A recommendation by the preparer whether a Geotechnical Report should be required to further evaluate site conditions and the proposed development of the subject property. Located on page(s)9 (8) If the presence of a hazard is determined within 300 feet of the proposed development, then the following are delineated on a geologic map/site map: (a) the area of the proposed development, Located on Map(s) Figure 2 (b) the boundaries of the landslide hazard area (top, both sides, and toe), Located on Map(s)Not applicable for this site (c) the associated buffers (top, both sides, and toe), Located on Map(s) Not applicable for this site (d) building or other setbacks (top, both side, and toe), Located on Map(s) Figure 2 Form-Effective June 2008 r (9) A site map drawn to scale showing the property boundaries, scale, north arrow, and the location and nature of existing and proposed development on this site. Located on Maps(s) Figure 2 I, Curtis D Cushman hereby certify under penalty of perjury that I am a civil engineer licensed in the State of Washington with specialized knowledge of geotechnical/geological engineering or a geologist or engineering geologist licensed in the State of Washington with special knowledge of the local conditions. I also certify that the Geological Assessment, dated October 9, 2008 and entitled Geological Assessment 17S4 W Shelton Matlock Road, Shelton, Washington meets all the requirements of the Mason County Resource Ordinance, Landslide Hazard Section, is complete and true, that the assessment demonstrates conclusively that the risks posed by the landslide hazard can be mitigated through the included geotechnical design recommendations, and that all hazards are mitigated in such a manner as to prevent harm to property and public health and safety. (Signature and Stamp) Washi� y _ fo ,-.y mac+ 2439 �y e'sed G eo\o CURTIS DEAN CU^HMAN Disclaimer: Mason County does not certify the quality of the work done in this Geological Assessment. GEOLOGICAL ASSESSMENT 7654 W MATLOCK ROAD SHELTON, WASHINGTON PREPARED FOR RACHEL WILLIAMS BY GEOTECHNICAL TESTING LABORATORY, INC. OLYMPIA, WASHINGTON RECEIVED oC1 2 4 7nnfl OCTOBER 9, 2008 426 W. CF, GEOTECHNICAL TESTING LABORATORY CONTACT INFORMATION PREPARER INFORMATION GTL PROJECT NUMBER: 08-0317 CONTACT: CURTIS D.CUSHMAN ADDRESS: 10011 BLOMBERG STREET SOUTHWEST OLYMPIA,WASHINGTON 98512 TELEPHONE: (360)754-4612 FACSIMILE: (360)754-4848 EMAIL ADDRESS: GEOTESTLAB@COMCAST.NET CLIENT INFORMATION CLIENT: WILLIAMS,RACHEL TELEPHONE: (360)485-2162 BILLING ADDRESS: 7652 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 SITE ADDRESS: 7654 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL: 420181290081 GPS LOCATION: N47°13'35.27"W123°13157.61" 10011 Blomberg Street SW,Olympia,WA 98512 2 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY SCOPE OF UNDERSTANDING WILLIAMS,RACHEL 7652 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 RE: GEOLOGIC ASSESSMENT 7654 W SHELTON MATLOCK ROAD SHELTON,WASHINGTON 98584 PARCEL#420181290081 N47013'35.27" W1230 13'57.61" Ms. Williams: As per your request, we have conducted a geological assessment and analysis for the above-mentioned parcel. 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, resteel), 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. Respectfully Submitted, GEOTECHNICAL TESTING LABORATORY Wash, � � c Curtis D Cushman Engineering Geologist Senior Engineering Geologist �p 2439 used Geo`o CUSH"AAN 10011 Blomberg Street SW,Olympia, WA 98512 3 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY TABLE OF CONTENTS CONTACTINFORMATION.......................................................................................................................................................2 SCOPEOF UNDERSTANDING.................................................................................................................................................3 TABLEOF CONTENTS..............................................................................................................................................................4 PURPOSE........................................................................................................................................................................................5 SITECONDITIONS...........................................................................................................................................................................6 GEOLOGICCONDITIONS.................................................................................................................................................................7 SITESOILS.....................................................................................................................................................................................7 GROUNDWATERCONDITIONS.........................................................................................................................................................8 DEPTHTO COMPETENT SOIL..........................................................................................................................................................8 PASTSLOPE INSTABILITY...............................................................................................................................................................8 HISTORYOF LANDSLIDE ACTIVITY................................................................................................................................................8 POTENTIALFOR LANDSLIDE ACTIVITY...........................................................................................................................................8 RECOMMENDATIONS......................................................................................................................................................................9 REPORT LIMITATIONS AND GUIDELINES FOR USE..........................................................................................................................9 READTHESE PROVISIONS CLOSELY...............................................................................................................................................9 WELLLOGS.................................................................................................................................................................................10 VICINITYMAP..............................................................................................................................................................................12 10011 Blomberg Street SW,Olympia,WA 98512 4 Phone#: (360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY PURPOSE This report summarizes the results of our geotechnical consulting services for the proposed garage construction. The report has been commissioned by Rachel Williams. The parcel (6.95 acres) is located off the West Shelton- Matlock road in Shelton, Washington. (See site aerial photos below). The site is approximately 6.5 miles west- northwest of Shelton, Washington. The site will be accessed from a private easement located at the adjacent parcel south of the subject site. 46 qr a �y. ^_ Terraserver Aerial Image Mason County GIS Aerial Image Our understanding of the project is based on our discussions with the client. We understand that the parcel is to be developed with a garage. Current land use includes a residential building and a detached garage is proposed. The existing septic drain field is located on the south east portion of the parcel and is approximately 55 feet away from the existing house. The approximate layout of the site is shown on the Site Plan, Figure 2. The steepest slope measured onsite was approximately 33 percent in a road cut in the southeast section portion of the project site. This slope is located to the southeast of the existing building and proposed construction. A seasonal stream(Type F)runs through the property and the approximate center line of the stream has been located in the site plan (attached at the end of this report as Figure 2). A 165 feet setback is required for the proposed construction from the Type F stream and has been clearly marked on the site plan. Therefore, Mason County requires that a geological assessment be prepared in accordance with the Critical Areas Ordinance. 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 15 percent (8.5 degrees) and 40 percent (21.8 degrees) will require a Geological Assessment, and may further require a Geotechnical Report upon the findings of the assessment. 10011 Blomberg Street SW, Olympia,WA 98512 5 Phone#: (360)754-4612 Fax#: (360)754-4848 G EOTECHNICAL TESTING LABORATORY SITE CONDITIONS At the project site, exploration was conducted on September 21, 2008 by Vijay Chaudhary. The purpose of the site inspection was to physically observe the property and adjacent properties to identify geologic and geographic conditions. Photographs and field observations were documented. Site-specific features were mapped, and vegetation noted. The site is well vegetated with plants common to Northwest except in the cleared areas where grass and shrubs are present. The site consists of a residential building. The site is well vegetated except for the cleared portion where the proposed garage and the existing house are located. The site has a predominant southeastern exposure and is well vegetated. Site elevations range from approximately 280 to 320 feet. The drainage is dominated by a stream channel trending roughly east-west across the center of the property which discharges to the west. The site plan is included as Figure 2 at the end of this report. No evidence of active surface erosion was observed. No surface water flow was observed onsite outside of the stream. No ponding of water was observed throughout the site. Slumping and sloughing was not observed throughout the site. No evidence of deep-seated slope instability was observed onsite. No seeps or springs were observed onsite. Onsite trees were observed to be straight and vertical. The closest mapped wetland is located approximately 1500 feet southeast of the subject site. The closest upland water body specified as Type F seasonal stream by Mason County located north of the proposed structure. The structure will be constructed with a 165 feet setback from the Type F stream. None of the water bodies will impact the construction and the construction,with adequate protection measures, such as silt fences,will not affect the streams. The site is very well vegetated with species common to northwest. a — --� . Picture showing existing building and the vegetation 10011 Blomberg Street SW, Olympia, WA 98512 6 Phone#: (360) 754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY GEOLOGIC CONDITIONS The Geologic Map of Shelton 1:100,000 Quadrangle, Washington (2003) by Robert L. Logan has mapped the geology as Proglacial and Recessional Outwash, Late Wisconsinan (Pleistocene) (Qgo) of continental glacial origin. The report reads: Proglacial and recessional outwash, late Wisconsinan (Pleistocene)— Typically poorly to moderately sorted, rounded gravel and sand with localized coarser- and finer-grained constituents; lithologically varied mixture of mostly northern provenance clasts, especially containing granitic and metamorphic rocks that identify the unit as being deposited by the Puget lobe of the Cordilleran glacier; also contains varying amounts of locally derived Crescent Formation basalt, and in the Mox Chehalis Creek valley, central Cascade Range— derived andesitic clasts; typically shades of gray where fresh or brown where stained especially in proglacial and morainal areas; buff staining near the ground surface;fine sand, silt, and clay constitute local overbank sediments having relatively poor permeability or deltaic foreset bedding along north sides of valleys with higher permeability, porous and permeable enough to yield small to moderate quantities of groundwater; very poorly consolidated to loose; moderately to well-rounded clasts; mostly unweathered with rare weathered reworked clasts; thickness varies and is not well known; most commonly occupies outwash channels scoured into or through till. Geologic Map of Washington— Southwest Quadrant (1987) by Walsh et al has mapped the site geology to be Qgo, (Undifferentiated glacial drift) of continental glacial origin. The description reads, Undifferentiated glacial drift---Clay, silt, sand, and gravel; contains moraines and mixtures of till and outwash not separately mappable. Consists of part of the Vashon Drift The site appears to be in the boundary region of Qgt and Qgo in the printed literatures as referenced above. SITE SOILS The Soil Survey of Mason County, Washington, USDA Soil Conservation Service (1960) has mapped the site soils as Lystair sandy loam with slopes from 0 to 5 percent (Ld) and Lystair sandy loam with slopes from 5 to 15 percent(Le). The Lystair sandy loam with slopes from 0 to 5 percent(Ld) is described as follows: This is the most extensive Lystair soil; it occupies gentle slopes in association with other Lystair soils. In forested areas a I- to 2-inch layer of loose, partly decomposed needles, leaves, twigs, roots, cones, and moss is on the surface. The mineral surface soil is very friable, single-grained, brown (dark reddish-brown when moist) sandy loam, 4 to 5 inches thick. It contains firm or slightly hard, irregularly shaped aggregates that are stained by iron, and, in addition, there are a very few shot. The next 12 inches of soil has the same texture but is very friable, massive to single-grained, and slightly lighter in color. The subsoil, between 16 and 27 inches, is very friable, single-grained, reddish yellow (reddish-brown when moist) loamy sand containing no shot. Below the subsoil is the substratum, which, to a depth of 36 inches, is massive, light 10011 Blomberg Street SW,Olympia, WA 98512 7 Phone#:(360)754-4612 Fax#: (360)754-4848 GEOTECHNICAL TESTING LABORATORY yellowish-brown sand that is firm in place but breaks easily into single grains. It contains much gray and dark-gray sand. Below a depth of 36 inches, the substratum is variegated light olive- brown and grayish-brown sand It is massive in place but readily crumbles to loose, single- grained material Faint yellow and reddish-brown mottles occur irregularly. A few pebbles are in the profile, especially where this soil merges with the Grove or Shelton soils. The soil is medium to slightly acid and is less acid with depth. The Lystair sandy loam with slopes from 5 to 15 percent(Le)is described as follows: The surface layer of this soil is brown to light brown, and it is slightly more variable, in depth than Lystair sandy loam, 0 to S percent slopes. There is slightly more runoff because of stronger slopes. All layers of the soil are porous. GROUNDWATER CONDITIONS Groundwater seepage was not observed at or near the proposed building location. Wetland vegetation was not observed at or near the proposed building location. Research of the local wells indicates that depth to static groundwater is relatively shallow and ranged from 10 feet to 14 feet below ground surface for well logs reporting the static water level. DEPTH TO COMPETENT SOIL The building location is upon a site where the Lystair sandy loam has been removed to the underlying Qgo. This material is liable to be loose and unsuitable for construction unless adequately watered and compacted. PAST SLOPE INSTABILITY Surrounding the subject site,trees were observed to be straight and vertical. No indication of past instability was discerned at the site. At the site the slopes are between 10 and 33 percent and no signs of instability were observed. HISTORY OF LANDSLIDE ACTIVITY No historical landsliding was observed during our site investigation onsite or near the subject parcel. At the proposed building location,the slope is compact and dense. Onsite trees are straight and vertical. POTENTIAL FOR LANDSLIDE ACTIVITY This site has no indication or record of old or recent landslide activity. Even though natural slopes approach near 33 percent,the potential for landslide activity is not a concern for the proposed development. 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 to D. Site class C is a very stiff soil or soft rock and site class D is a stiff soil. 10011 Blomberg Street SW,Olympia, WA 98512 g Phone#:(360) 754-4612 Fax#: (360) 754-4848 G EOTECHNICAL TESTING LABORATORY 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. 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. We recommend verification of site compaction before the footing is placed to assure the soil is suitable for construction. 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 assessment may not be fully applicable. 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 Code 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 Rachel Williams and her authorized agents for the proposed lot short subdivision 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. 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. 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 project. 10011 Blomberg Street SW, Olympia,WA 98512 9 Phone#: (360)754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY WELL LOGS FIN Onpl a st c nd Firm! with WATER WELL REPORT 5'm"�-� o pad Ss5 Dament nt of Ecology Second hra copy-oer•s copy STATE OF WASHINGTON AliThird COPY-Driller'.Copy water Right Parfait No. L O (1) OWNER: Nnme AddrNs CL 4) f ..f�.(L+r..R�_ Y (2) LOCATION OF WELL. county__.�_$na'► � �_wl.i� L—fctat' 9ae� 7.u.A _ W.M. (2a) STREET ADDORESS OF WELL(Or neareel add—) A., 5 Gl (3) PROPOSED USE: omeatic industrial ZI Municipal❑ (10) WELL LOG or ABANDONMENT PROCEDURE DESCRIPTION ❑ Irrigation y ❑ DeWater Test WOW D Other ❑ For,oatfon. Describe by color. character, sae or natarNl and shualra. and arrow ttYomnaa a.quitters and the kind end nature of the material U each stratvn penetrated. ram.' (4) TYPE OF WORK:Owner's lumbar or wits wait atN entry r'ast one y for each cha•.of info ultwn. (If.tore than ore) MATrAVAL ►Rost TO Abandoned❑ New well 1Y'Method: Dug ❑ Bond ❑ - O Deepened ❑ Cable G7� DrWen El C Reconditioned❑ Rotary❑ Jetted ❑ O aw.t (5) DIMENSIONS: Diameter of wali G IneMs. coDrWted—1 A feet. Depth of completed wall- R. E L (6) CONSTRUCTION DETAILS: p — — � Caablp InetaMed: • Dl.m.fton - WMded Dian.erom ft.fo ft. Liner inststled Threaded ONn.hwn fit.to h. a1 L Peffdfatl0tq: VN17T No 1p- O Type of perforator used a SIZE of perforations In.by N. cc cc perforations lrota III.to fl. patloratbss fromm h.to fl. F+ � perforetk'ns from fl.to ft. St:rNne: Yes No d lrenW.W.rir'a N.ms -- a�.r Type Model No Jr- Mount Slot —from—ft-fro n.to fit. n � DNn. Slat sae >4 Gravel Packed: Yes NO alx:s W prwN L 2 tQ Gnaw{placed fro'n ft.to ft surfaces Al; Y6821 No[] To what /dapm7 ^ Material used In N•I /3 tel�s�m •G �� ' z Didsnystretaconlsnm,usabNweterr Yp❑ No R Type of walarr Depth of strata Ql Method of•eelkq strata off a (7) PUMP: Manufacturara Name - -- Type.. H.P 0 (8) WATER LEVELS: Laed-tiurf.c.aleystbn .bow mean see Nw1 n. O Static Iew1_ � ft.below top of well Dale - (� ARaaian pressure lbs.per,*qua.Inch Data _. .. �.1 Artesian water N costrollsd by ...fw..'c. 1 RA O Work staged � tee C Mad (9) WELL TESTS: Drnwdown Is amp 1-star Nwl N lowered below static Nwl •"r wean pomp hiet made?Yam❑ No u If Van,by whom? r_ WELL CONSTRUCTOR CERTIFICATION: Ye W: psis min-with It.drawdotin after hre. _ _, I rsonatructad and/or accept responsibility for construction of this well, and Its compliance with all Washington well construction standards. k.+ .. Materials used and the information reported above era true to my beat tQ Recovery,data(time taken me zero when pump turned oM)(water Iewl seasared knowledge and belief. CL Mom wll top to waiter IMM) f 4) Te'w water:«.' T'n'm water Le.M Tka. Water Le..1 NAME rr` 11& HON.♦WM,arh cON•ONATION7iriwiv OR Mum � Address Oateof test /�/ (Signed) license No.J�32aL_ Bailer tea'�.�p.I.rmin.with 12 ft.dre down after lure. (WE Contractor's Airtent pal,rmkt With atom OM at ft.for M. Artesian now g_pm Date � N n Dete Tamperatera of-star_WuacMmialsnalyels madeT Vp❑ No ifs (USE ADDITIONAL SHEETS IF NECESSARY) EGYOWI-" (10147) -1a d]MW1 10011 Blomberg Street SW, Olympia, WA 98512 10 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY Stan Card No&4222X/_ � y°p'with WATER WELL REPORT UNOUE WELL I.D.y� second Copy—Owners Copy STATE OF WASHINGTON i Third Copy—Driller's Copy Weld R1gM Psmtill Na.. (1) OWNER: Name — t L I (2) LOCATION OF WELL: County1la IV��va Sec` T_�N.,R M (?a) STREET ADDRESS OF WELL fans eat ) I i (3) PROPOSED USE: �r"�4C lndustnat O Municipal O (10) WELL LOG or ABANDONMENT PROCEDURE DESCRIPTION Irrigation TesF Wa O Other Formation:Deserae by color.drarader•size of marereal and stn chins.and starve thickness d agaisrs I [_] DBWe[er I and the king and nature d ar0 material N each erratum penetrelad,with at heats one entry for each Owner's number of well charge OfMfomratioti (4) TYPE OF WORK: itt more than one) IMATF111AL F1[DM TO i Abandoned New well IN' Msifrod:Dug O Bored❑ psepaned r_y`,r'�Bt DrkronC Reconditioned❑ Rotary Jetted❑ I (5) DIMEN'J0Zia 1�4j: Diameter d well_ ems• Ikided feet. Depth 04 COmpbled well— -- R. i (6) CONSTRUCTION DETAILS:I casing insap Win.�^_lT ,�-tht..tro Diann.from RR Threaded ❑ _ Dlam.from Par orations: Yee❑ No Type ol perlcrabr used i SIZE of perforations in.try in. perforations from k to k perforations from ft.to R. L'SOurces Pro ram perforations from R.to R. Y 1 Scresns: Yss o❑ Mara) or's Name i Type Model No. .. . Dig "Slot sae Diam.__slot size from-----#.b k i Gravel pecked: Yes❑ No❑ Size of gravel Gravel planed from k b fl. Surfaos feel: Yea No❑ Torwhat dspth? ft. Material used in seal — �l .. Did any prate contain unusable water? Yes❑ Nod Type of water? _ Depth of strata— - I Method at seating strafe oe -- I i (7) PUMP: MatrufaCWrer's Name -- . 1Type: (9) WATER LEVELS: Late-auMove a ale on Work Snarled — 19 con eyed 0 t 9 ab mean tee butt �. Aunt level pressure ro� _ff ft..beer«top re w Date WELL CONSTRUCTOR CERTIFICATION: 54 Artesian preasu .per squareurch eh Dale Artesian water Is controled by _ I constructed and/or accept responsibWry for construction of*its wed. and its i (cap,vEw.OWT compliance with eel W&Shingbn well conslrudion standards.Materials used and (9) the informations reported above are true to my best knowledge and belief. WELL TESTS. Drawdown Is anana+t water level is Ivwered Debw petio Ievet I Was a pump test made?Yes❑ No L] n yes,by whom? NAME.?/Y/ `� l _r/ r Yield: gel.rmin-with _",drawdown after M. lPEetSw Fear.on CKNIPURATPM Add / � •• ,• » » License No. Recovery data(time taken as zoo when pump turned all(water level measured from well (sgrteafiw� � roP fo water Neel) Time Water Level Tine Water Level Time Well Level Contractor's i-3c-9g No h.. '��Date ,19_ (USE ADDITIONAL SHEETS IF NECESSARY) D d BOW teat �/con.`� �wonrn�has Ecology is an E Opportunity un and Affirmative Action employer.For spe- Airteat gal./min.with stem set at _ _R.for n.in b9Y dei accommodation needs,contact the Water Resources Program at(206) Artesian now p-0.m. Date 407-6600.The TDD number is(206)407-6006. Tepersh t of water Was a chemical analysis roads? Yes❑ N m a ECY OW 1.20(M3)"f 10011 Blomberg Street SW, Olympia, WA 98512 11 Phone#: (360) 754-4612 Fax#: (360) 754-4848 GEOTECHNICAL TESTING LABORATORY V_ICINITY IVAP.,..--. N47"145'- i L 110 0/ 7 9 If >47-14- 4 + + ache N -i l";-Iffis.; ropertv jP A A� .3 L IN �N47 ale 2 N47'114,5=' A6 71- 14' 1Y -7-Z. 10011 Blomberg Street SW,Olympia, WA 98512 12 Phone#: (360)754-4612 Fax#: (360)754-4848 CONTOURS ARE BASED ON SITE RECONNAISSANCE • USES FA RIC MATERIALNG WIDE ROLLS AND MASON COUNTY OIS WEBSITE. FABRIC TOLWIREES OR WIRE RING 70 ATTACH Geotechnlcal FX2-X14 GAUGE WIRE FABRIC OR EQUIVALENT 2 Testing Sd FACE /A\ Laboratory 7d N 27(4-WOOD POSTS,STANDARD OR BURY BOTTOM OF FILTER BETTER OR EQUAL ALTERNATE. MATERIAL IN S'X12-TRENCH \ STEEL FENCE POSTS ` �112' FILTER FABRIC C ��-- FABRIC OR EQUIVALENT 2'.T GROUND SURFACE F-W )� �\ SEASONAL STREAM C.L. any ELBACKFI LINTRENCH Qgo AND ON OF BOTH SIDES FILTER \ FENCE FABRIC ON THE SURFACE \` R�O uV I :xr WOOD POSTS P067S ALTI STEEL FENCE POSTS Geotechnical Services FILTER FABRIC FENCE NOTES: !�, I ( `\ 1.FILTER FABRIC SMALL BE PURCHASED IN A CONTINUOUS ROLL CUTTO QA/QC Services THE LENGTH OFTHE BARRIER TO AVOID USE OF JOINTS.WHEN JOINTS Testing Services ARE NECESSARY.FILTER CLOTH SHALL BE SPLICED TOGETHER ONLY AT `\ MINIMUM&INCH OVERLAP AND SECURELY 10 A SUPPORT POST WITH A! FASTENEDATBOTH ENDSTOTHEPOST. 32O' (//O M6 2 POSTS SHALL BE SPACED A MAXIMUM OF S FEET APART AND DRIVEN v \/ W SECURELY INTO THE GROUND(MINIMUM O 30INCHES). co 3.A TRENCH SHALL BEEXCAVATEDAPPROXIMATELY$INCHES WIDE AND 12 10011 Blomberg St,SW z;^ t INCHES DEEP ALONG THE LINE Of POSTS AND UPSLOPE FROM THE BARRIER. Olympia,WA 98512 o 4.WHEN STANDARD STRENGTH FILTER FABRIC IS USED,A WIRE MESH co Phone:(360)754-4612 SUPPORT FENCE SHALL BE FASTENED SECURELY TO THE UPSLOPE SIDE LO O THE POSTS USING HEAW4)UTY WIRE STAPLES AT LEAST I INCH Fax:(360)7544848 LONG,TIE WIRES OR HOG t / INTO THE TRENCH A MIN MUM OF 4IN INCHES AND SHALL N THE WIRE OT EXTEND EXTEND MORE THAN 3e INCHES ABOVE THE ORIGINAL GROUND SURFACE. 300' _ - SCALE: 1"=100 FEET // 5.THE STANDARD STRENGTH FILTER FABRIC SHALL BE STAPLED CRIMPED Date: 10/09/08 TO/ Qry O :NTT T FENCE ANDNCH.20 THE FABRIC O FABRIC N T ALLEXTEND N EXTENDED ,y INTO TXE TRENCH.ORIGINAL FABRIC SHALL NOT EXTEND MORE THAN 3e Designed by:VJ INCHES ABOVE THE ORIGINAL GROUND SURFACE.FILTER FABRIC SMALL 0 50 �00 200 NOT BE STAPLED TO THE EXISTING TREES. Drawn by: VJ Qg0 /' 9.WHENEXTRASTRENGTH FILTER FABRIC AND CLOSER POST SPACING IS Checked by: CDC USED TO9 ,THE WIRE MESH SUPPORT FENCE MAP BE ELIMINATED,IN SUCH C.I. 1 OI DW #: 10-09-08-054 A CASE,THE FILTER FABRIC IS STAPLED OR WIRED DIRECTLY THE i POSTS WITH ALL OTHER PROVISIONS OR ABOVE NOTES APPLYING. 7.FILTER FABRIC FENCES SHALL NOT BE REMOVED BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY STABILIZED. S FILTER FABRIC FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH _ REQUIRED RAINFALL RE AIRS ASTSHALL DAILY MADE IMMEDIATELY. EDIATELY. RAINFALL.ANY -� REQUIRED REPAIRS 9MNLL BE IMDE IMMEDIATELY. / n\ OENlML EROSION CONTROL NOTES: 1. EROSION CONTROL MEASURES SHALL BE IN PLACE PRIOR TO THE BEGINNING OF CONSTRUCTION.THE PROJECT ENGINEER AND THE COUNTY -` \ SHALL INSPECT AND APPROVE THE INSTALLATION O EROSION CONTROL MEASURES PRIOR TO BEGINNING CONSTRUCTION. EASONAL STREAM C.L. >'S _ 165 SETBACK, P F STREAM ( 2 EROSION CONTROL MEASURES ARE NOT LIMITED TO THE ITEMS ON THIS PLAN.THE CONTRACTOR IS RESPONSIBLE FOR THE g INSTALLATION AND MAINTAINANCE OFB ALL EROSION CONTROL MEASURES. PROJECT NAME- SHALL ALLOWED EXISTING CARE SHALL BEOTAEKEN TO I PREVENT MNAGE FACILITIES IGRAnON 0 / OF SILTS TO OFF SITE PROPERTIES. WILLIAMS SITE r 3.THE CONTRACTOR SHALL MAKE DAILY SURVEILLANCE Of ALL EROSION 7854 W SHELTON-MATLOCK CONTROL MEASURES AND MAKE ANY NECESSARY REPAIRS OR ADDITIONS ROAD / TO THE EROSION CONTROL MEASURES.THE CONTRACTOR SHALL PROVIDE / ADDITIONAL EROSION CONTROL MEASURES AS DETERMINED NECESSARY / BY THE COUNTY INSPECTOR ANDOR THE PROJECT ENGINEER.FAILURE ROL SHELTON,WASHINGTON PROPOS GARAGE TOCOMPLYY.TTMALL RESULT IN O PE ALnES BEING LE �� SILT F NICE E REQUIREMENTS MAY RESULT N/OCIVIL PENALTIES BEING LEVIED PARCEL 420181290081 _ � AGAINST THE CONTRACTOR AND/OR PROJECT 01MIER. /\ 4.DURING THE WET SEASON(NOVEMBER TO MARCH)ALL DISTURBED SOILS 1 go 11 r SHALL BE STABILIZED WITHIN N HOURS AFTER STOP OF WORK EROSION p1�I y�M, \ �K`J' CONTROL MEASURES SHALL INCLUDE,BUT NOT BE LIMITED TO. RG'ISNI IS• COVERING THE EFFECTED AREA INCLUDING SPOL PILES WITH ' / ) PLASTI OR HOOD HIPS'.SSEED SEEDING OF THE DISTURBED AREAS SHAL STRAW MATTING,JUTE MATTING, L'TAKE" EXISTING BLDG.1, ) PLACE AS WEATHER PERMITS. I I i` I 5,ALL SEEDED E BOOTED AREAS SHALL BE CHECKED AREAS SFI 1 ( TO MAKE.RE VEGETATIVE AND COVERAGE IS COMLETE AREAS SMALL BE VA / REPAIRED.RESEEDED.AND FERTILIZED AS REQUIRED. 1\ / e.TRACKING O SOIL OFFSITEILL NOT BE ALLOWED. ANY SOIL IS \ / TRACKED ONTO A COUNTYTY STREET IT SHALL BE REMOVED BY I THE ENO OFOFW \ / THAT WORKING DAY.ANY FURTHER TRACKING MUD WILL THEN \ / eE PREVENTED BY A OR WASHING OF THE EMCEES TIRES \ / BEFORE DRIVING ONN COUNT A COUNTY STREET. EXISTING / 7 NO MORE THAN 500 LF OF TRENCH ON A DOWNSLOPE O MORE THAN 5 I / PERCENT SHALL BE OPENED AT ONE TIME. I DRAIN FIEL / / // 9.EXCAVATED MATERIAL SMALL BE PLACED ON THE UPHILL SIDE O TRENCHES. / B.TRENCH ADVERSELY AFFECT DEVICES SMALL BE DISCHARGED IN A MANNER THAT WILL NOTADEROPERTI FECT FLOWING STREAMS.DRAINAGE SYSTEMS DR OFSITE PROPERTIES. SCALE:finch=100 feet 10.ALL STORM SEWER INLETS RECEIVING FROM THE PROJECT DURING So THAT / CONSTRUCTION SMALL BE PROTECTED SO THAT SEDIMENTALADEN WATER WILL BE FILTERED BEFORE ENTERING THE CONVEYANCE SYSTEM. / 11.ALL OFSME CATCH BASINS IMMEDIATELY ADJACENT TO THE SITE 300$ SHALL DI T PROTECTED FROM SILTATION I G U R E 2 / 12.ALL DISTURBED AREAS SHALL BE SEEDED OR SODDED UPON COMPLETION j OF WORK.THE COVERAGE F THE SHALL BE RESPONSIBLE TO ENSURE THAT / COMPLETE COVERAGE OF THE dSTUgBED AREAS 19 PROVIDED S THAT % GROWTH O THE VEGETATION IS ESTABLISHED. 13.CATCH BASINS SHALL TRAP SEDIMENT OR FILTER FABRIC MUST BE SITE PLAN PLACED UNDER GRATE UNTIL VEGETATION IS ESTABLISHED. 280'