The URL can be used to link to this page

Home My WebLink AboutEX12_HydrogeologicAssessment15365 NE 90th Street, Suite 100 • Redmond, WA 98052 • (425) 449-4704 3130 Varney Lane, Suite 105 • Pasco, WA 99301 • (509) 905-0275 esnw.com Earth Solutions NW LLC Geotechnical Engineering, Construction Observation/Testing and Environmental Services February 6, 2024 ES-9674 KKDM, LLC P.O. Box 1121 Bellevue, Washington 98009 Attention: Tony Hosn Subject: Hydrogeologic Assessment Rainier Dog Resort & Spa 900 South Grady Way Renton, Washington Greetings: In accordance with your request, Earth Solutions NW, LLC (ESNW) has prepared this letter summarizing our hydrogeologic assessment performed for the subject property. Project Description Based on review of the referenced plans provided to us, site modifications will be limited to minor landscaping elements. Specifically, areas along the site border will be converted from either gravel surface or asphaltic pavement to landscaping to provide a visual screen. At this time and to the best of our knowledge, no additional structural or grading modifications are planned. Surface The subject site is located in the northern corner of the intersection between Williams Avenue South and South Grady Way in Renton, Washington. Topography across the site is essentially level. The site is occupied by a one-story building, asphalt pavement and areas of gravel surfacing. A concrete sidewalk is present along the site frontage areas. Geologic Setting The site is underlain predominately by younger alluvial deposits consisting of relatively permeable sand, silt and gravel with occasional peat beds. Using the referenced Washington Geologic Information database, we identified a series of borings completed several blocks to the west around 1999. These borings confirm the presence of younger alluvial deposits and a relatively shallow groundwater table. EXHIBIT 12 RECEIVED PLANNING DIVISION 03/12/2024 AVanGordon DocuSign Envelope ID: 53E579AF-21BE-47B4-9BC7-CC82CA1C6943 KKDM, LLC ES-9674 February 6, 2024 Page 2 Earth Solutions NW, LLC Hydrologic Assessment ESNW visited the site in January 2024 to observe current surface conditions. We understand no grading or modifications to site soils are planned for this project. The project scope is limited to converting some hardscape areas to landscape. No significant change in use is planned. In this respect, no increased risk of adverse impacts to the local groundwater quality will result from the proposed project. Based on review of the referenced Aquifer Protection Areas (APA) map maintained by the city of Renton, the site is located within a Zone 2 protection area. A copy of the APA map illustrating the approximate site location is attached. Section 4-3-050 provides prohibited activities for various wellhead protection zones. Based on our understanding of the project scope, no prohibited activities listed for Zone 2 will occur on this site. Opinion and Recommendations Based on the information we have been able to review, and our understanding of the project scope, no adverse impacts to the local groundwater table will result from the project. Prohibited activities detailed in Zone 2 Wellhead Protection Areas code should apply to this project. We recommend the site be managed and protected using typical best management practices (BMPs) such as keeping the surface areas clean and disposing of litter and waste in accordance with applicable code requirements. In our opinion, provided applicable BMPs are incorporated into the project scope and business management practices, no adverse impacts to the local groundwater will occur. Based on the limited scope of the project and no significant change in use, in our opinion, no additional prohibitions or requirements will be required above those outlined in the Zone 2 code section. Limitations The recommendations and conclusions provided in this assessment are professional opinions consistent with the level of care and skill that is typical of other members in the profession currently practicing under similar conditions in this area. A warranty is not expressed or implied. DocuSign Envelope ID: 53E579AF-21BE-47B4-9BC7-CC82CA1C6943 KKDM, LLC ES-9674 February 6, 2024 Page 3 Earth Solutions NW, LLC We trust this assessment meets your current needs. Should you have questions, or if additional information is required, please call. Sincerely, EARTH SOLUTIONS NW, LLC Scott S. Riegel, L.G., L.E.G. Associate Principal Geologist Attachment: Partial APA Map cc: Lance Mueller & Associates Attention: Owen Keeper References: Site Plan, prepared by Lance Mueller & Associates, dated December 22, 2023 City of Renton Aquifer Protection Areas map Renton Municipal Code Section 4-3-050 – Wellhead Protection Areas Washington Geologic Information database 02/06/2024 DocuSign Envelope ID: 53E579AF-21BE-47B4-9BC7-CC82CA1C6943 Approximate Site Partial APA Map DocuSign Envelope ID: 53E579AF-21BE-47B4-9BC7-CC82CA1C6943