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f� � � conform with the requirsments of AoS,T�rfe "Specifications for Concr Masonry Units for C�nstruction of Catch Basins and Manholes", SerialtDesig- natinn C-139-39. The blocks sha11 be radial bloeks, Wa11 thickness and man- � hole diameters shall be .�s stated in the "Special Provisions", or as shown on' the plans� � � ;� � � ' � L: _ I 24002o14C Manhole Brick: Brick specified for manholes sha11 conform to the requirements of the Standard Specifica_tions for c.7.ay sewer brick, AeS�T�M, Aesignation C-32- 37T� Unless �therwise specified the grade required sha11 be NA. 24002,15 Concrete Materials: Concrete for monolithic �oncrete manholes and all manhole bases shall consist of St3ndard Portland Ceme�it Type I, clean washed sand and�_ crushed rock and gravel free from deleterious materialse Portland cemenk shall conf orm to A.SoT,M< Specifications, Portland Cement Type I, Standard Serial Designation C-150-47n Gradation shall be subject to the approval of the Engineer 24002.16 Mortar Materials: Mortar used for laying up concrete block or bri�k manholes or used for plastering up interior of manholes shall consist of Standard Portland Cement Type I, hydrated lime and clean, sharp, well graded sand, free from deleterious materials, Portland cement shall conform to AoS,T,M. Specifications, Portland Cement Type I, Standard Serial Designation C-150-47s Lime shall conform '�� to specifications far normal finishing hydrat�d lime, A,SaT.Mo Seri.31 Designatiop, C-6-44 or specifications for hydraulic hydrat�d iim� for structural purposes, _�', A.S.ToM. Serial Designation C-141-42, Natural cement shall conform to the ;`�. requirements for natural cement A,SoT�M� Serial Desigr�ation C-10-37� Gradation a�� shall be subject to the approval of the Engineere - 24050, CONSTRUCTION REQUIREMENTS; t� 24051, INSPECTION: t,`'` 24051.1 Of Materials at Fac*ary: Al1 materials whether furnished by the Owner or by F the Contracto� axe subject, at the discre*.ion of the Owner, to inspection and approval at the plant of the manufacturer� 24051.2 Of Materials at Delivery Point: During the process of unloading, all pipe and accessories shall be inspected by the Contractor fr� loss or damage in transite No shipment of material shall be accepted by the Contractor until or unless notai-ion of any lost or damaged material shall have been made on the bill of lading by the agent of the carrier. 24051e3 Fie�d Inspection: All pipe and accessories shall be laid, jointed, tested for defects and for infiltration in the manner herein specified as directed by the Engineer and subject to his approval, � 24051e4 Disposition of Defecti.ve Material: Al1 material found during the progress of the �aork to havP cracks, f.laws, or other defects wiil be rejected by the Engineer, and the Contractor sha.11 prompt�y remove from the site of the work such defective material, ' 24052e CONTRA.CTOR'S RESPOI�SIBILITY FOR MATERIAL: 24052_1 Responsibility for Marerial Fu.rnished by Contractor: The Contractor shall be responsible for all material furnis'�ed by him and he shall replace at his own � e�cpense all such mat�rial rhat is fo�nd to be defective in manufacture or that has become damaged in handling after delivery by tt-.e manufa.cturer, ' 24052�.2 Responsibi_lity f�r MateYial Furnished by Oc,mer: The Contractor's responsibility for material fu�-ciished by the Owner sha.11 begin at the point of delivery by the 24000 - 3