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Response to ENG comments 1.pdfLove ll-Sauerland and Associates, Inc. I� U 19217 36th Avenue West, Suite 106 — Lynnwood, Washington 98036 Memorandum Dater February 12, 2016 To: Jennifer Lambert, Engineering Technician City of Edmonds Engineering Division Phone: 425-775-1591 LSAEngineering.com File No. 5325 From: John Yuen Subject: Application #: BLD20151252 & BLDF20151536 (pool) Project: Ronquillo Project Address: 810 9th AVE S. This memo addresses the review comments made by the City of Edmonds Engineering Division staff for the Ronquillo single family residence. The following list summarizes the comments with the corresponding changes made to the application and plans. Additional fees, bonds, plans and insurance will be provided as needed at a later date. BLD20151536 - Pool by Jennifer Lambert Show a cross section of the pool equipment and sewer line to verify utility separation and coverage. Sewer line has been moved to north of the patio with pool equipment. Invert elevations have been added on sheet C4. SITE PLAN by Jennifer Lambert Site plan changes will be implemented by the project architect to be consistent with the current Civil plan sheets. GENERAL COMMENTS FOR THE CIVIL PLAN SHEET by Jennifer Lambert 1. As changes are made to other plan sheets, please revise this sheet as needed. Noted 2. The impervious surface calculations do not match the Site Plan. Please revise to be consistent. The impervious area calculations have been updated in the current Civil plan set, The project architect will update the impervious surfaces as shown on the Architectural plan set to be consistent with the Civil plan sets. Lovell-Sauerland and Associates Correction Response Memo LSA No. 5325 LAW. [1] Ronquillo February, 2016 3. The plans are not consistent with the Site Plan (i.e. the grassl7andscape area near the pool is shown as a patio on the Civils, sewer location, stairs, patio location, etc.). Please revise accordingly. The project architect will update the Site Plan to be consistent with the Civil plan set„ 4. Please hatch the concrete areas or landscape areas, such that it is clear which areas are permeable and which are impervious. Proposed concrete paving and permeable paving are hatched on sheets C2-C4. See sheet C2 for impervious area callouts. Other impervious areas not hatched include the house (with associated porches), garage, pool, and the patio adjacent to the pool. Everything else is landscaping. 5. Show the easements on all plan sheets. Easements have been added on all plan sheets. Easement labels are limited to sheet C1 for readability. 6. Remove the reference to the City subdivision file #, since this site is not part of a subdivision. Reference to city subdivision number has been removed and replaced with the permit application number BLD20151252. Cover and Existing Site Conditions C1 of 4 by Jennifer Lambert 1) Notes: Remove 6 and 8 Notes 6 and 8 have been removed. Notes 7 and 9 have been renumbered. 2) Please show the existing striping (parking, centerline etc.) Existing centerline and parking striping have been added. 3) Please add gas (PSE) to the utility purveyor information Gas service has been added to the utility purveyor information. Lovell-Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325^ [2] Site Development and SWPPP Plan C2 of 4 by Jennifer Lambert 4) Plan Notes. a. Remove note 1. Note 1 has been removed. b. The water meter cannot be reused for the new single family residence. Revise note 4 to say that the existing water meter will be used to provide water to the site during construction. Note 4 has been revised. Plan notes have been renumbered. 5) Add a note that the filter socks will be added to catch basins downstream from the site per Edmonds standard Detail E1.3 as needed. Note has been added, see plan note 6 on C2. 6) Show all trees and the drip lines of the trees, both onsite and adjacent to the site, that are to remain. The three trees located on the project site are proposed to be removed due to their proximity to the new structure. Per conversation, the plan can remain as is. 7) Please show protection fencing at the drip line of the trees. The three trees located on the project site are proposed to be removed due to their proximity to the new structure. Protection fencing is not required. 8) Provide a copy of the sewer easement. A copy of the existing sewer easement (A.F. #8312220095) has been attached for your reference. Also attached are the cities side sewer card, easement map and the plat map from the adjacent subdivision through which the easement runs. a. The rockery will need to be relocated unless the easement for the rockery to remain within the easement. The existing rockery within the sanitary easement will be removed. b. The proposed landscape wall appears to be located within the easement. The wall will need to be located outside of the easement unless the easement allow for it. The proposed landscaping wall is outside of the easement Lovell-Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 �^ [3] 9) The proposed driveway cut is adjacent to an existing driveway approach serving the property to the south of the subject site. There must be a minimum of 17' (TYP. 2-6' wings with a 5' landing between the wings) separation from the throat of the existing driveway to the new driveway approach. Please keep in mind that if the ADA slope requirement (8.394o) cannot be met with a 6' wing, the wing must be extended to meet the slope requirement, not to exceed 15'. Per the conversation of December 2015 you had with Kirk Myklestad, the existing driveway apron to the south of the project does not need to be redone. A revised location of the new driveway entrance per City's standard detail E2.26, with 5 foot landing separation from the throat of the existing driveway to the new driveway entrance is proposed. ADA slope requirement has been met (see plan for spot elevations). a. Please show the existing driveway approach (south driveway of the subject lot) on the plans. The existing driveway approach (south driveway of the subject lot) has been added. b. Show the separation between the two driveway approaches needed to meet the minimum 17' separation and the ADA slope requirement. See response to Review Comment #9 above. c. The proposed driveway approach shown is not consistent with Edmonds Standard Details E2.26. Please revise accordingly. The driveway approach has been revised to be consistent with E2.26. 10) Show all concrete and paving restoration within the City right-of-way (i. e. utility patch restoration, curb replacement, 2' asphalt patch for the areas where the curb will be replaced, etc.). All concrete and paving restoration within the City right-of-way have been hatched. 11) Please add the following note to the plans, "Contractor to complete final restoration on a// trench patches and any sidewalk and curb/gutter removed for utilities installed with this development." Note has been added, see plan note 6. 12) Show the proposed striping and areas where striping will need to be replaced. The existing parking striping adjacent to the lot will be relocated 5 feet north of the new driveway apron. See plan for new location. 13) Please add a note that if the sidewalk does not meet ADA standard slopes and/or is damaged it will need to be brought into compliance with this permit. Note has been added, see plan note 7. Lovell-Saueriand and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 L.IB^ [4] Storm Drainage Plan and Details C3 of 4 by Jennifer Lambert 1. Drainage construction notes: a. Note 1 does not appear to be feasible. If the footing drains cannot connect to the discharge line, please show where the footing drains will discharge to and revise the note accordingly. Footing drains have now been shown connecting to an onsite 6'x6'x6' drywell. Note 1 has been revised to reflect this, b. Revise note 3 to state that if the slope of the pipe exceeds 20%, the pipe will need to be anchored. Note 3 has been revised to include the above statement. 2. The City will not permit a force line to directly connect to the City storm system or be located within the City right-of-way. a. Please show the force line connecting to a catch basin located on private property and then gravity discharge to the City system. Comment has been addressed. 3. It appears that some of the surface water runoff from the driveway leading up to the motorcourt may discharge into the landscape areas. Please show how all surface water runoff from the driveway will discharge to the onsite stormwater management system (i.e. directional flow arrows, curbing, etc.) Additional catch basin and flow arrows have been added to better illustrate the collection and conveyance of the stormwater in the driveway and motorcourt. 4. Due to the size of impervious area being collect in the motorcourt, a type I catch basin is required. A type I catch basin has now been provided in the motorcourt. 5. Note on the plans that all catch basins located in the driveway and patio area to have a herring bone grade. All catch basins located in landscape areas to have a solid lid. Drainage Construction Note #8 has been added. 6. The area drains rim to invert exceeds 5'. Therefore, a type 11 catch basin is required. Either show a type 11 to be installed or revise such that the rim to invert does not exceed 5' Area drains, yard drains and catch basins shall maintain a rim to invert elevation of less than 5'. If rim to invert exceeds 5', a type II catch basin will be used. Lovell-Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 UBER [5] Drainage Report by Jerry Shuster The project is a Category 2 Small site project per Figure 8 in the #E72 Handout. It is also within a "Creek" drainage basin, therefore it is subject to the flow control standards of 0. 07, 0.14, and 0.33 cfs/acre impervious for the 2 -yr, 10 -yr, and 100 -yr recurrence events per Section 5.7 of the Edmonds Stormwater Code Supplement. The 0.1 cfs threshold is only for site classification and is not an applicable flow control standard. The pump system must be designed meet the applicable flow control standards. Enclosed is a recent Category 2 pump system example approved by the City within the same drainage basin. Pending. Water and Sanitary Sewer Plan and Details (C4 of 4) by Jennifer Lambert WATER 1. It appears that a 1 " meter is required due to the fixture count. The connection fee will be $7,574 (1" connecting is $12,624 minus the credit of %" which is $5,050) and $2,970 for the meter. a. Please add a note that a 1" meter is to be installed. Callouts have been modified to indicate removal of the existing water meter and replacement with a new 1" meter. b. Show the water meter located in the right-of-way, such that the back of the meter is on the property line. A new 1" water meter has been shown with its back on the property line. c. Please show a 1-1/2" line to be installed from the back of the meter to the house (as required for a combination fire and domestic service line). A 1-1/2" water line is called out from the back of the water meter to the house. d. Please label the pipe material and note tracer wire to be installed on the water service line. Pipe material has been added and tracer wire has been called out on the new water service line. 2. Show that there is a minimum of 10' of separation between the water and the sewer lines. The water and the sewer lines are separated by more than 10' as shown on plan. Lovell-Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 LAMME [6] 3. Show that there is a minimum of 3' of separation between the water and dry utilities (i.e. power, phone gas, cable etc.). More than 3' of separation has been shown between the water and dry utilities. A callout has also been added emphasizing this requirement. SEWER 1. The proposed plans show the sewer connecting to a private sewer line. a. Please provide a copy of the easement that allows for the sewer to connect to the existing sewer line. There may be more than one easement. There should be an easement(s) that addresses the connection to the private line as well as allowance for the line to run through the private properties until the line connects to the City owned sewer line. A copy of the existing sewer easement (A.F. #8312220095) has been attached for your reference. Also attached are the cities side sewer card, easement map and the plat map from the adjacent subdivision through which the easement runs. b. If the easement does not allow for the connection and an easement cannot be obtained, please show the sewer connection on 9rl' Ave S. Label the sewer connection as a romac inserta tee. The easement granted the right to jointly use the existing six—inch sewer line. c. If a pump is required, you may want to consider a pump system located within the structure. If you choose to install a pump outside the home the pump will need to be engineered and pre -design report will be required as outlines in handout E#62. Not required. 2. Show a sewer cleanout at the edge of easement. A cleanout has been added at the edge of existing easement. a. If the sewer connects to 9th Ave, show the 6" cleanout at the edge of easement and note that it will have a 12" cast iron lamphole cover with %" hexbolts Not applicable. The sewer will connect to the existing six-inch sewer line. 3. Show a cleanout located within 2' of the house, at any 90° bend, when there is less than 3' between two 45° bends, and when there is more than 100' between cleanouts. Cleanouts have been added, Lovell-Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 [7]. . 4. Show the invert elevations at the connection to the sewer line and the house so that slope and coverage can be verified. If the slope of the pipe exceeds 20% the pipe will need to be anchored. Invert elevations have been added at the connection to the sewer line and at all proposed cleanouts. The maximum slope of the pipe is 18%. 5. If the sewer will connect at 9`h Ave S, show a cleanout near the pool for future drainage of the pool. No direct connection from the pool to the sewer is permitted. See handout 875 for more information. A connection extending from the proposed 4" sewer line and a cleanout near the pool have been added for future drainage of the pool. 6. Please label the pipe material and size. The sewer lateral must be 6". Once on outside of the easement the sewer may reduce to 4" Pipe material and size have been added. Dry Utilities by Jennifer Lambert 1. Please show all proposed dry utilities (gas, phone, cable, etc.) on the plans so that utility separation can be verified. Minimum of 3' horizontal separation between the dry utilities and water, sewer, storm. All proposed dry utilities have been added on the plan. See Sheet C4. Thanks for your time and effort in reviewing this material. If you have any questions or need additional information, please do not hesitate to call. John Yuen Lovell- Sauerland and Associates Ronquillo Correction Response Memo February, 2016 LSA No. 5325 [81