20161103-Bid_Addendum_summary.docx

Summary of Bid Addendum November 4, 2016 Solicitation GS-03-P-17-AZ-C-0001 Environmental Remediation Services at the former Belle Mead Army Depot in Belle Mead, NJ Schedule A Bid Item 10 Site Grading quantity was reduced from 235 acres to 210 acres to reflect removal of repetitive site grading activities in the Consolidation Area and the Construction Support Zone.

Bid item 11 Top Soil and Seed quantity was reduced from 235 acres to 191 acres to reflect removal of Consolidation Area, Construction Support Zone, and Wetland/Riparian Areas which are not paid in this bid item.

Bid Item 16 Wetland and Riparian Zone Restoration and Plantings was rounded to 19 acres from the previous 19.081 acre estimate.

Bid Item 21-01 Rail Ties was updated to reflect an estimated quantity, measured in tons, for rail tie disposal.

Above changes were reflected in the Unit Price allowance with a 15% allowance on revised quantities.

Clarification of Tree/Shrub Plantings The Tree Mitigation plan used an incorrect value for the wetland and riparian zone restoration and will be modified to reflect the value below. The upland tree and shrub estimates of 8,000 and 3,000 trees will remain in Bid Item 15 and are inclusive of the plantings shown on the DRCC buffer zone restoration (1222 trees and 407 shrubs) and the 50-foot landscape buffer (___trees and ___ shrubs).

Wetland restoration, transition area restoration, and riparian zone restoration across 19 acres of the site (reflected in Bid item 16) include 9,078 trees, 2,505 shrubs, and 345 other (wetland sedges and rushes) plantings.

The following table details the numbers of plantings in each area of the site and under which bid item the plantings would be covered. Note that planting table on LP-1-16 is for the 50-foot landscape buffer which is part of the Eastern Area. This drawing has been updated to change “total project” to “50-foot landscape buffer”. Planting details have been prepared for Wetland Restoration, Wetland Transition Areas, Riparian Zones, and the DRCC Buffer Zones (see LP-1-01 through LP-1-10). Upland tree details are provided only for the 50-foot landscaped buffer on the eastern side of the site (see LP-1-11 through LP-1-16). Remaining upland tree plantings are discussed in the Tree Preservation/Mitigation Plan provided in the Bid Package. The trees/shrubs included in the Tree Preservation/Mitigation Plan are inclusive of the DRCC Buffer Zones and the 50-foot landscaped buffer.

SPECIFCATIONS

01 22 00 Unit Prices Bid Item 15 Upland Tree Mitigation, part a.i. updated to remove reference to landscaped buffer and to the planting specification (32 90 00). Clarified that the Upland Tree Mitigation Plan includes trees and shrubs in the Drawing inclusive of the DRCC buffer zone restoration and those proposed in the Tree Mitigation Plan (which includes the landscaped buffer). This does not include wetland restoration, transition area restoration, or riparian zone restoration.

Bid Item 21-01 Rail Ties updated to be paid on tons disposed.

01 30 00 ePM § 1.04.B.6 modified to state "Contractor shall upload all quality control reports, inspections and data as specified in other Sections of the Specifications.

01 57 19 Temporary Environmental Control § 1.05.B.2 modified to indicate the use of "SoilWorks SoilTac® or other approved dust control agent".

§ 1.05.D modified to reflect that onsite potable water source is not available and no water service is present at the site. Contractor shall secure a water source to fulfill all needs for water onsite.

§1.05 F modified to be consistent with the AMP: work will stop if visible dust is migrating offsite.

02 11 60 Site Demolition Modified to include buildings. “Pump house" deleted. Buildings include the former pump house and former maintenance garage. The pump house was observed during the site walk. The maintenance garage is a slab on grade with masonry block wall structure with asphalt roof that has collapsed. No testing has been conducted on building materials. It is recommended that the Contractor assess the building prior to demolition. Asbestos Containing Material or other regulated material is not anticipated and should be assumed that these materials will not be found.

02 51 00 Decontamination §3.04 "Management of Decontamination Residuals" modified to require collection and offsite disposal of decontamination residuals from the Burn Pit excavation and the pistol range remediation. Decontamination in other areas of the site shall be conducted at designated areas to be approved by construction manager. Decontamination residuals in those areas may be allowed to percolate into the surrounding ground surface as long as no overland flow is allowed and that decontamination is not conducted in or directly adjacent to areas that have been remediated.

02 82 00 Fencing Specification added.

31 05 19 Geosynthetics §3.01.C updated to clarify Seaming procedure. Seeming is preferred method with six inch overlap. Eighteen inch overlap will be required for unseamed joints as approved by CM.

31 22 00 Backfill and Grading §3.02.F.3 updated to reference see mixtures in Turfs and Grasses specification.

31 23 00 Excavation § 1.09.B modified such that no more than three non-contiguous 10-acrea areas of disturbed (un-stabilized) land is being worked at any given time.

32 90 00 Planting Planting tables removed from specification and references to Drawings, Permits, and Tree Mitigation Plan added.

Updated to clarify that contractor shall assume that live stakes are 1-2-inches in diameter and 2-6-feet long. Species shall be at least three of the following: Cephalanthus occidentalis (Buttonbush), Cornus amomum (Silky Dogwood), Cornus sericea/C. stolonifera (Red Osier Dogwood), Salix discolor (Pussy Willow), Viburnum dentatum (Arrow Wood), and Viburnum lentago (Nannyberry). For survivability, material should be planted during dormant season (November 1 - April 30th).

32 92 00 Turf and Grasses Wildflower seed mix added to be utilized in railyard and consolidation area.

DRCC seed mix added to be used in the DRCC buffer zone.

Include lime application rates (per 1,000 square feet) as follows: for pH 4.5 - 5 = 150 lbs; for pH 5 - 5.5 = 100 lbs; for ph 5.5 - 6 = 50 lbs; for pH 6 - 6.8 = 25 lbs; for pH greater than 6.8 no lime will be applied. No Lime will be used in wetland restoration areas.

Drawings Revision #3 of the Drawings include updates to the Soil Erosion and Sediment Controls for the site. An updated Soil Erosion and Sediment Control Plan reflecting these changes will be provided after its submission to the Somerset-Union Soil Conservation District.

Existing conditions Provided Autocad file of existing conditions to facilitate consistent measurements and estimation of quantities for the bid.