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6. D <br /> ,�:._. E�XH1B� <br /> ��. ,. <br /> � �:� �''�.1�1 � <br /> L:�Y�r i`°?errin�'I�z;: ; 4lt;.�7tI�:3.W�CtO't's:�� <br /> I��g:.�arr7lc;n�:;C,�tuicw�?r 5td,94''�fa5�3� f'•;a�: <br /> (Zili:;r?3�t�:,�.?'1:��? b'�tC�t�h'it•r?dlfi,v,:'Jf''i� <br /> oa-o229� <br /> April 6, 2449 <br /> Mr.Javier Sierra <br /> C�}►of Redwood City <br /> 1Q17 Middlefield Road -. <br /> Redwood City,CA 94�64 <br /> SUBJECT: 8-Inch and 16-lnch Diameter Seaport Boulevard Pipelines, Redwood City,CA <br /> Proposa!for Corrosion Engineering Services <br /> Dear Javier, <br /> V&A is pleased to submi�this proposal to provide a ca#hodic protection design for the 8-inch diameter <br /> and 16-inch diameter Seaport Boulevard Pipelines. Based on our understanding,the 8-inch diameter <br /> pipeline cansists of a�proximately 9,000 feet of dipped s#eel pipe installed in 1937 and the 1fi-inch <br /> pipeline consists of approximatefy 9,04Q feet of sieel pipe installed in '�978. The pipelines extend <br /> between the Bayshore Freeway and the Seaport Center and are adjacent to the sait evaporatian <br /> ponds on the east side of Seaport Boulevard. <br /> The record drawirtgs forthe 16-inch pipeline indicate that an impressed current cathodic protection <br /> system with iwo rectifiers was installed with the pipeiine. �ne of the rect�ers, loca#ed at the pump <br /> statbn on Seaport Court,was recently identifted. The rect�er is on and is discharging current but the <br /> e#fectiveness of the rect�er has not yet been determined. <br /> The project scope o#work below is based on designing and installing repfacement cathodic protection <br /> systems on the 8-inch and 16-inch meta(lic pipelines. Cathodic protection is recommended for tF�e <br /> pipelines due to the proximity of the salt evaporation ponds and the prior use of the proper#y along the <br /> pipeline alignmen#. <br /> The scope of work is divided into two phases in order to accomplish t�►e goal of installing cathodic <br /> protection on the pipelines. Phase I will evaluate the existing cond�tion o##he cathodic protection and <br /> corrosion rnanitor�ng systems for the pipelines,locate existing test stations,perform initia�tests for <br /> electrical continuity and electrical isolation and provide locations for excavation and installation of test <br /> stations on the pipe[ines. <br /> As discussed,V&A will retain the services of an underground contractor to expose the pipeline at 1 Q <br /> locations. Based on recent praject experience,the excavations are estimated at approximately <br /> $8,000 each. VNe wili contact three contractors to obtain bids fior the exca�ation,bacS�fiill,traffic contro( <br /> tlA#CLAWb I t�l(�i,1Sft)!kt <br />