2400 33RD ST CONTRACT AGREEMENT 2016-01-01 MF Import

ATTACHAAENT A TO SECTION 01900 REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONS Parking Lot Site Improvement The sequence of work within ihe parking lot shall generally be as (ollows: 1. Excavate lot to design grade, saving top material if suitable as directed by the Resident Engineer. These are shaded areas on the drawings. 2. Proof roll newly excavated areas, excavate and backfill as described below. Structural fill shall coiisist of gravel borrow in accordance with Section 9•03.14(1) of ihe Standard Specifications, cornpacted in ac;:urdance with Section 2-03.3(14)C. Unsuitable material is defined as any material ihat does not meet the requirements for gravel borrow or crushed surfacing base course in accordance with Section 9-03.14(1) and 9-03.9(3). Roadway and site excavation shall include excavation, removal, hauling, placing and compacting existing suitable material to design grade �ocations, and disposal of all surplus material. Any excavation or embankment beyond the limits indicated in the Plans, unless ordered by the Resident Engineer, will not be paid tor. All work and material required to return these areas to iheir original condition, as dir�cted by the Resident Engineer, shall be provided by the Contractor at no additional cost to the Owner. All areas shall be excavated, filled, and/or backtilled as necessary lo comply with the grades shown in the Plans. In filled and backfilled areas, fine grading shall begin within Ihe tinal 6" of fill. Final grading shall produce a sur(ace ihat is smooth and even, without abrupt changes in grade. The Contracior shall provide temporary drainage to keep the grade tree from standing water. The subgrade shall be free from rocks or cemented lumps larger than 2Yz' in greatest dimension, in ihe top 6". Excavatioi tor curbs and gutters shall be accomplished by cutting accurately to the cross-sections, �rades, and elevations shown. Care shall be taken not to excavate below tiie specitied grades. The Coniractor shall maintain all excavations free from detrimental quantities of leaves, brush, sticks, trash, and o�her debris until tinal acceptance oi ihe work. When the existing temporary detention pond is no longer needed, it shall be drained, backiilled with gravel borrow, and the ience removed. Alternatively, the bottom of the detention pond may be backfilled with unsuitable onsite soils as detined in ihe supplement to Section 2-03.3 of the Standard Speci(ications up to 24 inche� below the subgrade elevation, and compacted at ihe direction o( the Resident Engineer. Ii unsuitable onsite soils are used to backfill the pond, construction geotextile for soil stabilization shall be placed between the unsuitable soils and the overlying gravel backtill, in accordance with Table 3 0( Section 9-33.2(1) of the Standard Speci!icatior.s. The excavations for precast concrete storm tilter vault and pre-ire .,nent vault shall be over- excavated 78 inches and backfilled with compacted crushed sur(acing base course in accordance with Section 9-03.9(3) placed and compacted in accordance with Section 4-04.3(4) and 4-04.3(5). Excavation Below Grade Section 2-03.3(3) is supplemented with ihe tollowing: Excavated onsite ma�erial which meets Ihe requirements fer gravel borrow or crushed suriacing base course as defined in Sections 9-03.14�1) and 9-03.9(3) shall be reused tor onsite backfill as directed by ihe Resident Engineer. Capital Projecis Commuter Rail Attachment A to Section 01900 - 9 IFB No. RTA/CP 21-06 � Everett Station Phase 2REVISION� TO THE STANDARD PLANS AND SPECIFICATIONSAddendum No.4