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. • <br /> PUBL/C WORKS <br /> � <br /> MEMORANDUM <br /> �I'O: Rachel Jacobs, Omega Engineering, Inc. <br /> � ���.5� ►��u�-�n <br /> FROM: Sabrina Fandler, �ngiileering/Public Scrvices Department ��� �� <br /> � <br /> D�TF,: July l, 2015 � `� ��n9 <br /> r�j U <br /> SUBJECT: Ylan Review Comments �r l 'r � �s <br /> � <br /> PROPOSAL: Construction of new duplex with all required utilities. � ��� P�a�s. <br /> LOCA"1'ION: 310 Wcst Casino Rd �� �"1�`S <br /> PERMIT NUMBER: PW 1506-024 <br /> A review of this project by the Engineering/Public Services Department indicates that the following <br /> revisions should be made and/or the following conditions must be met: <br /> 1. The driveway cut shall be shown in the sidewalk, per COE standard drawing 308. <br /> Q� <br /> P� 2. Please provide survey/as-built information for the existing CB adjacent to the curb cut, including <br /> inverts. ���`'��C�-ti'�I � ��U�(-1- _���1.,g� �2--�\ C.CV'1C, _ '���' <br /> i <br /> ., . . , ,, �E �- 5`at .4�, � Z" Ccw�c �i �'. �'l.k>_C�-� ►'1 c� �, <br /> � Assuming the CBs have open geates, the SDCO needs to be changed to a catch basin wrth i•im and <br /> invert information called out. <br /> � Please specify CE3 types and specify a 2' deep sump for pretreatmcnt of pavement runoff for each <br /> CB shown. The calculations you have provided assume a riser height of 2', however it appears that <br /> there is only 0.5' of infiltration trench depth below the perforated pipe, which essentially functions <br /> as thc riser for this system unless an overflow riser is installed in the last catch basin. <br /> 5. Runoff from PGIS may not be discharged to undcrground infiltration systems without being <br /> pretreated first. ���� 4 . -� �Z' �:�) `�I�IV)� <br /> ✓6. The requirement for systems serving S,OOOsf or more of impervious area and for systems treating <br /> runoff from PGIS is 3' from the bottom of the washed rock of the infiltration trench to the seasonal <br /> high ground water elevation. (�� <br /> ✓7. Please label the downspouts and please state that all downspouts will discharg�e to the infiltration <br /> trench. <br /> 8. Please see all cominents �nade on the plans and revise as necessary. <br /> 9. Please see all notes made in the draina�e repoi-t and revise as necessary. <br /> 10. Please see attached "Common misconceptions regardii�g flow control for small projects in the City <br /> of[;verett". <br /> C1TY OF EVERETT� 3200 Cedar Street � I?verett, WA 98201 � www.ci.everelt.wa.us <br />