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� OMEGA 2707 Wetmore Avenue <br /> Everett, WA 98201 <br /> ENGINEERING, INC. t 425_3s�_3s2o <br /> f 425_259_1958 <br /> July 20th, 2015 <br /> Sabrina Fandler <br /> Engineering/Public Services Department <br /> Public Works <br /> City of Everett <br /> RE: First Plan Review Comments <br /> Permit Application #: PW1506-024 <br /> Dear Sabrina, <br /> This letter is intended to summarize the changes made to the engineering package reviewed during the <br /> initial permit review for this project. This letter addresses comments from you and other City employees <br /> which were provided in a letter dated July 1, 2015. <br /> 1. The existing driveway cut is located in the sidewalk and is now shown correctly on the plans. <br /> 2. Per our phone conversation and the information you provided, all available survey/as-built <br /> information for the existing catch basin adjacent to the curb cut is shown on the plans. See sheet <br /> 2 of the drainage plans. <br /> 3. A catch basin is proposed to connect the proposed stormwater facilities to the 8" drainage stub at <br /> the northeast corner of the property. Rim and invert elevations have been called out. See sheet <br /> 2 of the drainage plans. <br /> 4. Catch basin types have been called out on the plans. A note has been added to the plans, as <br /> well as a discussion in the report for each proposed catch basin to provide a minimum of 2 foot <br /> deep sump for pretreatment of pavement runoff. See sheet 2 of the drainage plans and section 8 <br /> of the drainage report. The depth below the perforated pipe for the proposed infiltration trenches <br /> has been adjusted to 2 feet. See the infiltration details on sheet 2 of the drainage plans. <br /> 5. Runoff from the PGIS will be pretreated with a 2 foot deep sump at the bottom of each catch <br /> basin before entered the infiltration trenches. <br /> �i 6. The infiltration trenches have been separated and designed to each serve less than 5,000 sf of <br /> ,,(��� �� impervious surfaces. This will allow only 1 feet of required separation from the bottom of the <br /> 1�' � washed reck of the infiltration trench to the seasonal ground water elevation. See sheet 2 of the <br /> � � ��`e�� drainage plans. <br /> � � �� � �,�7. Downspout connections have been called out on the plans with a note added that all downspouts <br /> �� ���J` ,���� will discharge to the infiltration trenches. See sheet 2 of the drainage plans. <br /> '�e� �� ���� 8. All comments made on plans have been revised as necessary. <br /> � <br /> �`� � �� 9. All notes made in the drainage report have been revised as necessary. <br /> �' 10. This project has been revised to meet applicable flow control standards. <br /> .� <br /> �(d � Thank you for taking the time to review the revised plans for this project. Please feel free to contact me <br /> ��" ,/with any questions you may have. <br /> 1� ,r����� ti� Ir�eorr��c,¢- Dri��u.� ��E Shazan. <br /> rJ 2- Sincerely, � <br /> �� �GG�G�G�J�,�-,� � au�' Co� S-� �wg �8 <br /> Rachel A. Jacobs �a Sh� d���F� ►"Fi1/��7►'L <br /> Omega Engineering, Inc. p,U/ r�d� �, m� <br /> � <br /> —CC�'s�( DW Jc �o� i f' �.,,� <br /> � w� �2a�� Gvo�^k.��.��z> <br />