AMND0001_EAWWTP.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04 EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

THIS AMENDMENT EXTENDS THE PROPOSAL DUE DATE UNTIL 23 JULY 2013; 2:00 PM

The cutoff date for all Requests for Information (RFIs) has passed. Any RFI received after that date may not be addressed.

(Continued)

1. CONTRACT ID CODE PAGE OF PAGES

J 1

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA 15C. DATE SIGNED 15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer) (Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912BU-13-R-0035

X 9B. DATED (SEE ITEM 11)

14-Jun-2013

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required) Edgewood Area Wastewater Treatment Plant Enhanced Nutrient Removal (ENR) Upgrade, Aberdeen Proving Ground, Aberdeen, Maryland

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

11-Jul-2013

CODE

US ARMY ENGINEER DISTRICT, PHILADELPHIA

CONTRACTING DIVISION

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODE CODE

EMAIL: TEL:

Amendment No. 0001 RFP No.: W912BU-13-R-0035

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14. DESCRIPTION OF AMENDMENT (CONTINUED):

a. General Note – The following pages include specification sections and drawings that have been amended. All pages have been annotated with “Amendment No. 0001” in the header.

b. CHANGES:

(1) SECTION 00815 – WAGE RATES – Please delete this section in its entirety and substitute revised Section 00815, annotated as “Amendment No. 0001,” and attached hereto.

(2) SPECIFICATIONS – Please make revisions/changes/additions to the Specifications as detailed in pages 5 through 17 of this attachment.

(3) DRAWINGS – Please make revisions/changes/additions to the Drawings as detailed beginning on page 17 through 24 of this attachment.

c. PLEASE INDICATE RECEIPT OF THIS AMENDMENT ON STANDARD FORM 1442 (SOLICITATION, OFFER, AND AWARD) AS AMENDMENT NO. 0001. FAILURE TO ACKNOWLEDGE ALL

AMENDMENTS MAY BE CAUSE FOR REJECTION OF THE OFFER.

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SPECIFICATIONS:

1. Section 01 05 00:

a. Paragraph 1.3.2: Add the following to the end of the paragraph: “Also attached at the end of this

Section are the following: “Environmental Subsurface Investigation Memorandum,” “Environmental groundwater Sampling Memorandum,” and “Environmental Component of WWTP Upgrade Construction.”

b. Add the following Attachments at the end of this Section:

1) “Environmental Groundwater Sampling.”

2) “Environmental Component of WWTP Upgrade Construction”

c. Paragraph 1.6.2:

1) First Sentence, Replace: “on post” with: “approved staging and stockpile area.”

2) Replace Second Sentence with: “The material shall be segregated by topsoil, clean non-organic and potentially contaminated (requires analytical).”

3) Replace Third Sentence with: “Soils determined to be contaminated shall be segregated, stored on, and covered with poly sheeting. Contractor shall coordinate disposal of contaminated soil with APG DPW Hazardous Waste Division.”

2. Section 01 56 10:

a. Paragraph 1.5.1.2; Third Sentence: Delete: “sanitary sewers” and Replace with: “EA WWTP”

b. Paragraph 1.10.6: Replace: “The contractor shall not deposit, spread or dispose of any excavated soils removed from APG contaminated site(s) unless specifically authorized by the government in writing to dispose of such soils at a APG or commercial site” and Replace with: “The contractor shall stage and stockpile all excavated soil materials from the site in the approved designated staging stockpile area, located 2-3 miles away, south of Bush River Road and just east of Building E-2100. This site is permitted for 14,000 cubic yards. If additional area for soil staging is necessary, the contractor shall coordinate with APG to establish a MDE approved and government owned site within a haul distance of 10 miles.”

3. Section 01 57 23; Paragraph 1.3.1, First sentence, Replace: “sanitary sewers” with: “EA WWTP”

4. Section 02 01 00: paragraph 1.1, Delete the sentence that reads: “This continues in 24 inch increments until the required construction depth is reached.” and Replace it with the following: “This continues in 24 inch increments until either the required construction depth is reached or a depth of 10 feet below grade is reached. No UXO sweeps will be required below 10 feet deep.”

5. Section 03 20 00.00 10:

a. Page 1, paragraph 1.1: Delete: ASTM A767/A767M, ASTM 775/A775M, ASTM A1035/A1035M, and ASTM A934/A934M

b. Page 2, paragraph 2.3: Delete sentence which reads: “In highly corrosive environments or when directed by the Contracting Officer, reinforcing steel shall conform to ASTM A767/A767M, ASTM A775/A775M, ASTM A1035/A1035M or ASTM A934/A934M as appropriate.”

6. Section 03 30 00, paragraph 3.1.3: Revise the first sentence which reads “Provide vapor barrier beneath the interior on-grade concrete floor slabs” so that it reads “Provide vapor barrier beneath all on-grade concrete floor slabs.”

7. Section 05 12 00, paragraph 1.4: Delete this paragraph in its entirety.

8. Section 26 29 23:

a. Page 8, paragraph 2.1.9.M: Delete in its entirety and Replace with the following: “Provide control monitoring interface as shown on the contract drawings.”

b. Page 8, paragraph 2.1.9.N: Delete in its entirety.

c. Page 8, paragraph 2.1.9.P: Delete in its entirety and Replace with the following: “See specification Section 43 11 00, for temperature control module details.”

d. Page 8, paragraph 2.1.9.Q: Delete in its entirety.

e. Page 10, paragraph 2.1.9.U: Delete in its entirety.

9. Section 31 00 00, Page 8, Part 3.2 General Excavation:

a. Insert as second sentence: “Soil materials from the excavation areas shall require special management practices. Copies of the existing APG EA WWTP Environmental Sampling Technical Memorandum shall be made available to the Contractor. The Contractor is responsible for reviewing and becoming familiar with contaminants of concern identified in APG EA WWTP Environmental Sampling Technical Memorandum. Contractors who will be in direct contact with soil and groundwater materials will be required to wear personal protective equipment to prevent dermal exposure. Personal protective equipment will consist of level D protection under OSHA 29 CFR Part 1910 (hard hat, safety glasses steel-toed boots, disposable coveralls and chemical resistant gloves). Disposable personal protective equipment will need to be containerized onsite, appropriately labeled, and disposed of in a designated APG dumpster (in accordance with APG SOP 042, Part 3.4.2). Dust control measures shall be used by the contractor during all soil disturbing activities to eliminate air bourn contaminant exposure to contractors.”

b. In original line 5 Insert the following: “Excavated soil shall be screened for organic vapors using an

Organic Vapor Analyzer (OVA [i.e. PID, FID or other]) meter. The Contracting Officer shall be notified immediately if any change in site conditions or previously undiscovered contamination is encountered during excavation activities (i.e. staining, odors, sheens).”

In original Line 8, delete the following: “Dispose surplus satisfactory excavated material not required for fill or embankment in areas approved for surplus material storage or designated waste areas.

Dispose surplus and unsatisfactory excavated material in designated waste or spoil areas” and replace with: “Dispose surplus satisfactory excavated material not required for fill or embankment in the designated and approved staging and stockpile area separately from unsatisfactory surplus material and material demonstrating vapor concentration equal to or greater than 5 ppm.”

Stockpiled soil materials that registered less than 5 ppm on the OVA meter may be reused as backfill onsite. Stockpiles containing soils that registered at concentrations equal to 5 ppm or greater on the OVA meter require one composite sample per 5,000 cubic yards for volatile organic compounds (VOCs- EPA Test Method 8260), semi-volatile organic compounds (SVOCs EPA Test Method 8070), Priority Pollutant Metals (EPA Test Method 6010/7000), and Pesticides/PCBs (EPA Test Method 8082). Samples shall be collected from each stockpile and tested for contaminants of concern by an MDE approved/certified laboratory. The contractor shall provide the contracting officer with copies of analytical results to determine disposal or reuse as backfill. Lab tested soil material that is reported at concentrations below than the EPA Maximum Concentration Limits for Industrial Soil (MCLs) and within APG Benchmark Levels may be reused at the EA WWTP site or stabilized and stored at the staging and stockpiling area for future reuse as backfill. Soil material that is reported at concentrations above the EPA MCLs and APG Benchmark Levels will need to be segregated, stored on, and covered with poly sheeting for disposal. The contractor shall coordinate disposal of contaminated soil materials with the APG Department of Public Works (DPW) Hazardous Waste Division.

All soil materials excavated from the site will be staged and stockpiled in the approved designated staging stockpile area, located 2-3 miles away, south of Bush River Road and just east of Building E- 2100. The approved stockpile and staging area will not require UXO clearance as long as the existing surface is not disturbed. The contractor will be required to make minor improvements to the site such as installing or repairing existing super-silt fencing, enclosing the area with a gated entrance and a stone ingress and egress at the site entrance to reduce the amount of mud, dirt and rocks transported offsite by vehicles and equipment. A contractor provided bulldozer shall be used to stockpile the soil.

This site is permitted for 14,000 cubic yards. If additional area for soil staging is necessary, the contractor shall coordinate with APG to establish a MDE approved and government owned site within a haul distance of 10 miles. All excavated soil material should be stockpiled in accordance with 2011 Maryland Standards and Specification for Soil Erosion and Sediment Control: (Section B-4-8) Standards and Specifications for Stockpile Area. The approved stockpiling and staging areas shall be isolated from other materials and managed so that runoff from areas is diverted and not allowed to enter the stockpile area. The contractor must submit an erosion and sediment control plan for approval to Mr. Steven Aust (410-306-1120) with the APG Department of Public Works (DPW) prior to staging and stockpiling activities.

c. Page 9, Part 3.2.4 Dewatering: Insert the following before the first sentence: “Copies of the existing APG EA WWTP Environmental Groundwater Sampling Technical Memorandum shall be made available to the Contractor. The Contractor is responsible for reviewing and becoming familiar with contaminants of concern identified in APG EA WWTP Environmental Groundwater Sampling Technical Memorandum.

Contractors who will be in direct contact with groundwater and/or groundwater dewatering equipment will be required to wear personal protective equipment to prevent dermal exposure. Personal protective equipment will consist of level D protection under OSHA 29 CFR Part 1910 (hard hat, safety glasses steel-toed boots, disposable coveralls and chemical resistant gloves). Disposable personal protective equipment will need to be containerized onsite, appropriately labeled, and disposed of in a designated APG dumpster (in accordance with APG SOP 042, Part 3.4.2).

A groundwater dewatering plan, including shop drawings and design data shall be submitted to Mr.

Richard Wiggins, Water Program Manager, with the APG DPW prior to dewatering and discharge into the existing EA WWTP. The groundwater dewatering plan should include the following items:

• Type of dewatering system

• System components (design, location, depths)

• Description of equipment and instrumentation to be used with installation, and operation and maintenance procedures

• Filters sediment decanting and treatment specifications: (type and size of filters applicable to identified contaminant metals: iron and manganese)

• Containment strategy (i.e. frac/baker tanks)

• Disposal methods of collected water (if applicable)

• Water quality monitoring methods

• Method for establishing and monitoring groundwater levels for construction site

• Design calculations demonstrating capability of proposed system and equipment

Groundwater generated during construction dewatering shall be contained upon extraction (i.e.

frac/baker tank). Contained water shall be secured to prevent unintended discharge. The contractor is responsible for maintaining all associated equipment and compliance with the approved dewatering plan. No groundwater may be discharged at any location other than the existing EA WWTP.

Disposal of containerized groundwater may be necessary in the event that groundwater does not meet the discharge requirements after treatment.”

d. Page 15, Part 3.13.1 Earth Embankments: Insert the following as the second sentence: “Excavated soil may be considered as satisfactory material and reused as to construct earth embankments, unless soil OVA readings indicate readings of 5ppm or greater.”

10. Section 33 11 00:

a. Page 6 Paragraph 2.1: Add the following: “All water distribution main material and installation requirements apply to both potable and non-potable water systems.”

b. Page 6 Paragraph 2.1.1.1B: Add the following item #5:

“5. Couplings All connections from existing to new pipes shall be made with couplings as required to accommodate difference in pipe materials and diameters. All Couplings shall meet AWWA C219 with castings being ductile iron meeting or exceeding ASTM A536. All coupling gaskets shall be SBR compounded for water and sewer service in accordance with ASTM D2000 MBA 710. All bolts and nuts shall be High Strength alloy steel trackhead bolts meeting AWWA C111. All couplings shall have shop coat applied finish with a pressure rating of 260 psi.”

c. Page 8, Paragraph 2.1.2.5: Add the following: “All restraint systems shall be specifically designed for the type of pipe (i.e. PVC or DIP) being installed.”

11. Section 33 34 00:

a. Page 2 Paragraph 2.1: Add the following: “All pressure drains and bypass lines shall meet the requirements of specification section 33 44 00.”

b. Page 3 Paragraph 2.3.3: Add the following paragraph:

“2.3.3 Couplings All connections between existing to new pipelines shall be made with couplings as specified in section 33 11 00”

c. Page 4, Paragraph 3.1.8 Add the following: “All force main piping and joints shall be restrained. All pressure drains and bypass lines shall be restrained within 20’ of any valve, horizontal or vertical bend/fitting, or wall casting.”

d. Page 5, Paragraph 3.2.1: Replace: “The pipeline shall be subjected to a test pressure of 100 psi or 150 percent” with the following: “The following is a schedule of hydrostatic test pressures for wastewater piping:

• 24” Bypass at MBBR: 20 psi

• All Pressure Drains: 30 psi

• All forcemains: 150 psi

12. Section 40 95 00: Add the following paragraph:

“2.3.6.3 GAS DETECTION EQUIPMENT

Toxic gas sensors shall be provided in the Screening Facility. The system shall be set up for toxic gas detection as described herein. All gas detection equipment shall be listed and intrinsically safe.

Sensors for methane in Class I, Division 1, Groups C & D locations shall be the infrared type, with a minimum useful life of one year. Sensors shall have provisions for mounting to a flat surface remote from monitoring device. Provide sensor extension kit as necessary for remote installation. Range for toxic gas sensors shall be 0-100 percent of Lower Explosive Limit (LEL) at full scale represented by a proportional 4-20 mA signal. Repeatability shall be ±2 percent of LEL. Sensor shall be suitable for outside 24VDC.

Sensors for hydrogen sulfide and oxygen in Class I, Division 1, Groups C & D locations shall be of an encapsulated, plug-in electronics and sensor design with non-intrusive span adjustment. The sensor shall be capable of detecting hydrogen sulfide in concentrations of 0-10 to 0-200 ppm and oxygen in concentrations of 0-10 percent to 0-25 percent ambient air deficiency, represented by a proportional 4-20 mA signal. Response times shall be less than 12 seconds for hydrogen sulfide and less than 12 seconds for oxygen. Temperature operating range shall be -4 to +122 deg. F for hydrogen sulfide, and -4 to +122 deg. F for oxygen. Sensors shall be suitable for non-intrusive calibration. The sensor shall have repeatability of ±1 percent of full scale. The sensor shall be loop powered suitable for 24 VDC.

Sensors shall be furnished and installed with shield/calibration adaptor and permanent calibration tubing.

All associated appurtenances shall be properly anchored in accordance with manufacturers’ recommendations.

The gas detection sensor enclosures shall be of the following classifications:

LOCATION GAS SENSOR ENCLOSURE RATING

Screen Room CH4,H2S,O2 Class I, Division I, Groups C&D

As a minimum, UL approved spare parts for the system shall be provided as follows:

1. All primary AC components including connectors 2 One (1) extra sensor of each type.

The toxic gas sensors shall be supplied with test kits approved for calibration tests.

Gas detection system shall be furnished with 4-channel controller to power and monitor up to 4 channels of gas detection. The controller shall have a minimum of 3 alarm relays per channel plus a common fault relay. The controller shall provide local and remote alarm annunciations via strobe light and buzzer. The controller shall have a latched alarm resent button, discrete LED value display for gas name, type and value and 4-20mA outputs. The controller enclosure shall be NEMA 4X and UL Listed.

13. Section 43 11 00: Paragraph 1.3.2, Add the following to the end of the paragraph: “All references in this section to 'off-gas' shall be recognized as referring to atmospheric air.”

14. Section 43 11 33:

a. Paragraph 2.17.1, Add at the end of the paragraph “The motors shall be inverter-duty rated for continuous VFD operation.”

b. Paragraph 2.20, Add at the end of the paragraph: “Overall noise level from the assembled/enclosed equipment shall not exceed 80 db(A) (free-field) at 1.5 meter from the equipment enclosure.”

c. Paragraph 3.6.4 - Noise Suppression, Replace entire paragraph with “Sound levels to be recorded during field testing.”

15. Section 46 41 11;

a. Paragraph 1.3.1, Delete the paragraph entirely and replace with the following:

“RAPID MIX, FLOCCULATION AND POST AERATION MIXERS:

Equipment manufacturer shall have a minimum of 10 years experience manufacturing equipment similar to that specified. The equipment manufacturer shall provide a list of at least ten (10) U.S.

installations where equipment identical to that proposed to be furnished has been in successful operation. Submit list of installations with information as described below.

MBBR MIXERS:

MBBR Supplier shall provide documentation to demonstrate the selected top-mounted mixer manufacturer has been used successfully in full-scale MBBR applications without damaging the media. Submit composite list of installations with information as described below.

The term "installation" shall mean individual projects/contracts. Multiple equipment units for a project shall be considered as one (1) installation toward meeting the experience requirements. Each installation information shall include, but not be limited to, the following:

a. Name and location of the installation

b. Name of person in direct responsible charge for the equipment.

c. Address and phone number of person in direct responsible charge.

d. Month and year the equipment was placed in operation.

e. Capacity of Equipment.”

b. Paragraph 1.3.3: Add the following paragraph:

‘1.3.3 MBBR MIXER SUPPORT AND ACCESS PLATFORM

The design of the MBBR mixer supports, walkway, and access platform shall be designed by the MBBR mixer supplier and shall bear the stamp of a Maryland PE.’

c. Paragraph 2.1.1 Design Requirements Add subparagraphs:

d. All MBBR mixers are to be furnished by the MBBR Supplier per Specification Section 46 53 33

MOVING BED BIOREACTORS.

e. All MBBR mixers shall operate at a range of agitator speeds through VFD’s.

d. Paragraph 2.1.1.c: Replace 3rd and 4th Tables with the following:

MBBR Mixers (Oxic Zones)

Number of Mixers per Tank 1

Tank Dimensions (LxWxD) 26 x 20 x 18 feet

Liquid Level Approx 13 feet

Volume 50,000 gallons

Minimum Motor Nameplate Power 5 hp

Maximum Nominal Motor Speed 1800 RPM

Material of Wetted Parts 316 Stainless Steel

Impeller Type 3 Blade, Down Pumping, Rag

Resistant Wide Blade Hyperfoil

Maximum Output Speed 30 RPM

Minimum Impeller Diameter 105 inches

Minimum Impeller Primary Pumping Capacity 63,000 gal/min

Impeller Off Bottom Spacing 100 inches

Minimum Shaft Diameter 3 inches

MBBR Mixers (Anoxic Zones)

Number of Mixers per Tank 1

Tank Dimensions (LxWxD) 13 x 20 x 18 feet

Liquid Level Approx 13 feet

Volume 25,000 gallons

Minimum Motor Nameplate Power 5 hp

Maximum Nominal Motor Speed 1800 RPM

Material of Wetted Parts 316 Stainless Steel

Impeller Type 3 Blade, Down Pumping, Rag

Resistant Wide Blade Hyperfoil

Maximum Output Speed 30 RPM

Minimum Impeller Diameter 105 inches

Minimum Impeller Primary Pumping Capacity 63,000 gal/min

Impeller Off Bottom Spacing 100 inches

Minimum Shaft Diameter 3 inches

e. Paragraph 2.1.7.1, Add the following to the end of the paragraph:

“A heat sensor thermostat and overload shall be attached to and imbedded in the winding and be connected in series to stop the motor if winding temperature exceeds manufacturer recommended temperature. The overload shall indicate an alarm to the process control system. The thermostat shall automatically reset when motor cools to safe operating temperature.”

f. Paragraph 2.2.e, Add the following as paragraph 2.2.e: “Top mounted mixers located in the MBBR shall have submerged support columns for the mixer walkway/access platform constructed of reinforced concrete that are designed by the mixer manufacturer and stamped by a Maryland Professional Engineer.”

g. Paragraph 2.3.b, Add the following to the paragraph: “This information is to be part of the data required to be submitted per paragraph 1.2. “capacity performance data.”

h. Paragraph 2.3.d, Motors, Add subparagraph:

(8) MBBR mixer motors shall be inverter duty rated.

i. Add Paragraph:

2.3.h ACCESS BRIDGE AND PLATFORM

1. Where indicated on the Contract Drawings provide access bridge and platform as indicated.

2. Provide a bridge of wide flange beam or pony truss construction extending from the tank wall to the stationary drive base.

3. Provide a bridge extension to provide access to the far side of the drive mechanism.

4. Bridge shall be designed for the dead load and a live load of 50 lbs/sq. ft., with a deflection not exceeding 1/360 of the span.

5. Provide a 3'-0” wide walkway of 1-1/4" x 3/16" aluminum grating extending over the entire bridge length.

6. Provide a 2-rail handrail consisting of 1-1/2" diameter, Sch. 40 welded aluminum pipe for rails and posts.

7. Provide a 4" high aluminum toe plate along both sides of bridge and bridge extension.’

16. Section 46 53 33:

a. Paragraph 1.2.1.a.(5), Change: “integrated fixed firm actavated” to “integrated fixed film activated”.

b. PART 1, Add the following paragraph:

“1.5 MANUFACTURER/SYSTEM SUPPLIER'S PERFORMANCE BOND

a. The MBBR System Supplier shall provide a performance bond for the MBBR system and equipment parts in the amount of 100% of the cost of the proposed system/equipment and services. The bond from the MBBR System Supplier shall be submitted by the Contractor to the Government at the time of startup of the MBBR System Supplier and must be in a form and from a bonding company satisfactory to the Government. The performance bond shall extend for a period of one (1) year after the end of successful startup of the MBBR system. Successful startup is defined as evidenced by the Government’s acceptance of the Manufacturer's Certificate as described herein.

b. The performance bond shall include all direct costs, including labor, arising from any required remedy, including replacement of the equipment, due to failure of the MBBR system to perform as specified. Failure to perform as specified is defined as failure to meet the performance requirements established in this section during the “Inspection and System Startup” and “Process Performance Testing” periods specified herein.”

c. Paragraph 2.1.1.a:

1) After the first sentence; Add the following heading before the table: “MBBR INFLUENT

CRITERIA”. Below the same table, Add the following: “*Includes in-plant recycle flows.”

2) Delete: “Total Air Requirement (Max Month) SCFM <1,300” and Replace with: “Total Air Requirement (Max Month) SCFM 1,300”

d. Paragraph 2.2.d: Revise the heading to read: '”WALL AND FLAT SCREEN ASSEMBLIES”

e. Paragraph 2.2.d.(1): Revise the sentence to read: “The MBBR System Supplier shall furnish all wall screens, flat screens, and all other media retention devices in the MBBR basins, including the bypass pipe and the overflow area from zone to zone, as shown and specified, and as needed to keep the media in the intended zone.”

f. Paragraph 2.2.d (9): Add the following as paragraph (9) at the end of the paragraph:

(9) Sparger Air Scour Piping: 1-inch diameter 304/304L stainless steel air scour piping shall be provided for each wall (flat) screen as shown on the Contract Drawings. The air scour piping shall be tapped from the main air line.

(a) Sparger piping shall be rated for continuous operation.

(b) Airflow shall be at least 1 CFM per square foot of screen area.

g. Paragraph 2.2.f: Revise the heading to read: “MODULATING AND ON/OFF CONTROL VALVES”

h. Paragraph 2.2.f: Add the following as Paragraph (4):

The following valves shall be provided:

a. Qty: 6

b. Equipment No. EMBBR-BFV-07 through EMBBR-BFV-12

c. Size: 2"

d. Valve Type: Butterfly

e. Valve Style: Lug

f. Operation: On/off

g. Actuator Type: Electric

h. Material: Cast iron body, aluminum bronze disc, 316SS stem

i. Seat: Viton

i. Paragraph 2.1.2 under “MBBR EFFLUENT QUALITY REQUIREMENT”, Change: “BOD5 (filtered)” to “Soluble CBOD5”, and Delete the second row in its entirety: “TKN (filtered) < 2 mg/L 30 day average*”.

j. Paragraph 3.5.2.c.(3), Delete paragraphs (a)-(d), and Replace with the following:

(a) Proper air scouring at the screens and no excessive hydraulic headlosses across the screens.

(b) Even air distribution in the aerated basins. The aforementioned air flow test shall be conducted.

(c) Satisfactory mixer operation.

(d) Satisfactory operation and control of the process air blower system, control valves, and instrumentation.

k. Paragraph 3.5.2.d, Add paragraph (4) as follows:

(4) During the startup/acclimation period, observe satisfactory operation of all equipment, aeration, mixing, instrumentation and process controls similar to the Clean Water Testing. In addition, verify proper media mixing in the aerated basins and the anoxic (mixed only) basins, without excessive media migration towards the media retaining screens or floating to the basin surface. If headloss exceeds 3-inches, media migration will be considered excessive.

l. Paragraph 3.6.2, Delete paragraph “c” in its entirety and Replace with the following:

c. If the performance test commences during the warm months, or the wastewater temperature is above the design minimum temperature listed in the MBBR Influent Criteria for “Phase I Maximum Month” during the testing period, the Contracting Officer may elect to conduct additional testing and wastewater sampling during the colder months when the wastewater temperature is lowest to verify the process performance at no cost to the Contractor or the MBBR Supplier. Should the process system not perform as expected the Contracting Officer may call upon the Contractor/MBBR Supplier under the warranty provisions and the Manufacturer’s Field Services as specified herein.”

m. Paragraph 3.7.a, Delete paragraph (4) in its entirety.

n. Paragraph 3.7.c, in the first sentence, Delete the word: “filter”.

17. Section 46 53 43:

a. SECTION 46 53 43 – DEEP BED DENITRIFICATION FILTERS – DELETE Line 2.1.2.b (5) stating

“DO < 4mg/l,” and REPLACE with “DO < 5 mg/l when filter influent nitrate concentration is than or equal to 10 mg/l, and DO < 4 mg/l when filter influent nitrate concentration is between 10 and 15 mg/l.”

b. Paragraph 2.2: Add:

“h. Grating shall be heavy duty aluminum plank and made from 6” wide extruded sections with interlocking sides, banded to form standard panel widths. Surface shall be diagonal punched with 15 percent open area, OGI upsets for slip resistance and mill finished. Loading shall be 100 lbs. per square foot over the required clear span with deflection not to exceed ¼ inch. Fabrication and tolerances shall be in accordance with the NAAMM Metal Bar Grating Manual. Anchorage and support shall be in accordance with the manufacturer’s recommendations.”

c. Paragraph 2.3.e: Delete Analyzer feature table and Replace with the following:

FUNCTIONS AND OUTPUTS

Measurement Principle High Resolution, Ultraviolet Absorbance

Number of Wavelengths 256 Spectral Range 200 - 450 nm Calibration Technique Pattern Recognition of Spectral Data Number of Parameters 4 max. (Opt)

Parameter Options Primary Or Secondary Absorbance(See Table 1 or 2)

Data Communications 4 - 2OmA (8 outputs max.), RS-232

Data Log 1000 Values Time/Date Stamped, 24 Calibration Spectra

Auto Zeroing YES (Std)

Auto Cleaning YES (Std)

Analyzer Pump YES (Std), Zeroing, Cleaning, Internal Sample Flow Only

Sample Conditioning YES (Opt), Direct Injection Number of Sample Lines 1 to 2 thru Internal Manifold

PERFORMANCE SPECIFICATIONS

Reading Interval 3 - 9999 minutes Response Time Parameter Dependent (3 - 5 min. typ.)

Range Parameter/Site Dependent Accuracy Parameter/Site Dependent Typ. 2% to 5% of Range Precision Parameter/Site Dependent Typ. 2% of Range Zero Drift Parameter Dependent Minimized with Auto Zero

SAMPLE PARAMETERS

Sample Pressure Pressurized Sample Lines must be regulated to 10 psi maximum, with max. lift 5 ft. and max.

run 20 ft. to sample location or line connection

Sample Flow 0.5 to 5 l/min.. (1.5 1 flush/sampling)

Filtration Requirement NONE, Optional ultrafilter available for high solids or turbidity

Strainer Requirement Mesh Opening of 2.0 mm Max.

Sample Temperature 1 degC – 60 degC (Std) Sample Turbidity 0 - 60 NTU (Std) Sample Suspended Solids 0 - 150 mg/l (Max)

MAINTENANCE

Light Source Replacement Every 5 years Internal Battery Replacement Every 2 years Zero/Clean Solution Refill As Required (2-4 weeks typ.)

Reagent Refill As Required (2-4 weeks typ.)

INSTRUMENT SPECIFICATIONS

Size 40 x 20 x 10 in.

Weight 130 lbs.

Mounting Wall (Std) or Stand (Opt)

Finish Coating Baked Enamel on Steel (Std) or Stainless Steel (Opt)

Power 120/240 VAC ±10%, 50-60 Hz, 10 Amps max.

Power Connection Hard Wired (Std) or Plug (Opt)

Power Condition Dedicated Branch Circuit Free From:

surges/dips > 10%, RF and Switching Noise

Operator Interface 2 x 20 LCD and 4 x 4 Keypad

Sample Cell Material Polymer Body with Quartz Windows

Sample Connection ¼" FNPT Fitting

Waste Connection ¼" FNPT Fitting (Open Drain Required)

OPERATING ENVIRONMENT

Enclosure Ratings NEMA 4 (Main Enclosure)

NEMA 3R (Optrode Enclosure)

Ambient Temperature 5° - 35°C (Std)

Relative Humidity 0 - 100% (Non-Condensing)

d. Paragraph 2.1.e: after “nitrate”, Add “,nitrite, ammonia”.

e. Paragraph 3.2.1.c, (2),: Delete paragraph “(e)” in its entirety and Replace with the following:

“(e) If the performance test commences during the warm months, or the wastewater temperature is above the design minimum temperature listed in the Filter Feed Influent criteria during the testing period, the Contracting Officer may elect to conduct additional testing and wastewater sampling during the colder months when the wastewater temperature is lowest to verify the process performance at no cost to the Contractor or the filter manufacturer/supplier. Should the process system not perform as expected the Contracting Officer may call upon the Contractor/filter manufacturer under the warranty provisions and the Manufacturer’s Field Services as specified herein.”

f. Paragraph 3.2.1.c, (2),: Add paragraph “(g)” as follows:

“(g) Generally, the influent wastewater characteristics, and flow and load variations are typical of that of municipal domestic wastewater. It is not expected that biologically toxic materials in the filter influent, if any, are in amounts detrimental to the treatment process.”

g. Paragraph 3.2.1.c, (3), paragraph (b): Delete the second sentence and Replace with:

“24-hour composite samples shall be collected at the filter influent and effluent using the portable automatic wastewater sampling units furnished by the Contractor as specified in Section 46 53 33 –

MBBR.”

h. Paragraph 3.2.3.a,: Add the following: “ The filter manufacturer shall include two (2) additional days in one (1) trip for follow-up within six (6) months after successful completion.”

18. Section 46 23 00:

a. Paragraph 2.2.a: Add the following:

“Sequence of Operation

Grit Collector Modes of Operation:

Hand: Grit Collector shall run Continuously Auto: Grit Collector shall cycle on for 10 minutes every 15 minutes. A 24 hour time clock set at 15 minute intervals shall start timing cycle. Grit collector shall start after a 10 minute time delay.

All cycle timers shall be adjustable by the operator.

Blower Modes of Operation:

ON: Blower shall run continuously.

OFF: Blower shall not run and be locked from operating.

E-Stop: System (Collector and Blower) shall stop if emergency stop button is pushed/activated.

Emergency stop shall be resettable.

Alarms:

Collector drive unit: High current/thermal overload. Alarm indication light provided at panel.

Blower drive unit: High current/thermal overload. Alarm indication light provided at panel.

Provide reset buttons for all alarms. ”

b. Paragraph 3.2.3: Delete entire paragraph and replace with the following:

“When the grit removal equipment and controls with all related piping have been installed, the Contractor shall conduct a field test of the Grit Removal Equipment in the presence of the Contracting Officer’s Agent. The tests shall be sufficiently complete to demonstrate that the equipment is operating in a satisfactory manner, in accordance with the requirements of these specifications. Submit written proof of test procedure and satisfactory completion of field test.”

c. Paragraph 3.2.2.1.a: Delete entire paragraph.

d. Paragraph 2.2.b.19: Delete “and NEMA 7”

e. Paragraph 3.2.2.1.b: Delete the second and third sentences in their entirety and Replace with the following: “Air shall then be diffused through the diffusers at the rated capacity of the blower and the uniformity of the diffusion shall be observed.”

DRAWINGS:

19. Sheet No. CD-107 (15 of 309) Replace in its entirety with new attached Sheet CD-107.

20. Sheet No. C-111 (19 of 309) Replace in its entirety with new attached Sheet C-111.

21. Sheet No. C-112 (20 of 309) Replace in its entirety with new attached Sheet C-112.

22. Sheet No C-113 (21 of 309) Replace in its entirety with new attached Sheet C-113.

23. Sheet No C-113/C-114 (21 & 22 of 309) Utility Plan A/B- 24: For utility going from Building E-3959 on

Sheet C-113 to new SMH-11 on sheet C-114: Change references for this utility from “24-inch FM” to “24-inch PD.”

24. Sheet No. C-117 (25 of 309) Replace in its entirety with new attached Sheet C-117.

25. Sheet No. C-120 (28 of 309) Replace in its entirety with new attached Sheet C-120.

26. Sheet No C-121 (29 of 309) Utility Profiles :

a. 16” Sewer from Influent Box to Secondary Influent Pumping Station: Change “4’ MH” to “5’ MH for sanitary manholes SMH 5 and SMH 6.

b. 16” FM From Secondary Influent Pumping Station to Ex. 16” FM: Change Inv. at Sta. 1+87 from

“3.57” to “2.47”

27. Sheet No C-122 (30 of 309) Utility Profiles:

a. 24” FM from Aeration Tank (E-3959) to Ex. Manhole: Change title to “24” PD from Aeration Tank

(E-3959) to new Manhole.”

b. Change all references from “24-inch FM” to “24-inch PD”

28. Sheet No C-202 (33 of 309): Add detail for horizontal buttress as indicated on the attached Sketch SK-9 dated 7/8/2013. Buttress shall be installed as required by construction note 1 on sheet C-113.

29. Sheet No. L-101 (43 of 309): Replace in its entirety with new attached Sheet L-101.

30. Sheet No. S-SCRN-101 (54 of 309) ECRN-Screening Facility-Ground Level Plan: Add the following as Sheet Note 9: COORDINATE ATTACHMENT OF HVACE UNITS HUNG FROM PRECAST PLANKS

WITH MANUFACTURER.

31. Sheet No. S-SCRN-300 (56 of 309) ESCRN-Screening Facility-Sections:

a. Add the following note with leader pointing to underside of slab: SHEET WATERPROOFING AT

UNDERSIDE OF LIQUID CONTAINING CONCRETE SLAB.

b. Section 1: Change the top of slab elevation from: “-5.00” to “+5.00.”

32. Sheet No. S-3953-101 (62 of 309): Add the following to the GENERAL SHEET NOTES: “7. Refer to

PHOTO PLANS for visual examples of existing conditions.”

33. Sheet No. S-3956-300 (66 of 309) Building E3956-Secondary Influent Pump Station Sections: Add the following note with leader pointing to underside of slab: SHEET WATERPROOFING AT UNDERSIDE

CONCRETE TANK.

34. Sheet No. S-BLCT-101 (73 of 309) EBLCT-Blower Control Room-Roof Framing Plan:

a. Add the following to Sheet Note 1 under concentrated service loads: FROM AHU-3: VERTICAL

LIVE LOAD HUNG FROM UNDERSIDE OF PLANK = 800 LBS LOCATED PER M-BLCT-100

b. Add the following as Sheet Note 7: COORDINATE ATTACHMENT OF HVACE UNITS HUNG

FROM PRECAST PLANKS WITH MANUFACTURER.

35. Sheet No. S-MBBR-300 (77 of 309)

a. EMBBR-Sections: Add the following note with leader pointing to underside of slab: SHEET

WATERPROOFING AT UNDERSIDE CONCRETE TANK.

b. Sections 2, 3, & 4: Change Scales from: 3/4” = 1’-0” to 1/4” = 1’-0”

36. Sheet No. S-3958-101 (79 of 309): Add the following to the GENERAL SHEET NOTES: “7. Refer to PHOTO PLANS for visual examples of existing conditions.”

37. Sheet No. S-DNFF-101 (84 of 309): Delete notes above filters which reads: “GRATING AND SUPPORT BY MANUFACTURER (TYPICAL)” and note above influent channel which reads: “FRP GRATING (TYPICAL)” with a note that reads: “GRATING AND SUPPORT BY FILTER MANUFACTURER, SEE

PROCESS DRAWINGS (TYPICAL)”

38. Sheet No. S-3963-301 (91 of 309): Change: “GALVANIZED” steel plate to “STAINLESS” steel plate in

Section D and Detail 1.

39. Sheet No. A-602 (115 of 309): Door Types: Delete: “B HALF GLASS” and Add; “C HALF GLASS”

40. Sheet No. P-BLCT-101 (127 of 309): Remove: Floor drains in the Electrical Room as shown on SK-M3.

41. Sheet No. PD-3857-101 (130 of 309): Remove: Floor drains in the Electrical Room as shown on SK-M4.

42. Sheet No. P-3857-101 (131 of 309): Remove: Floor drains in the Electrical Room as shown on SK-M5.

43. Sheet No. P-601 (133 of 309): Remove: Floor drains in the Electrical Room as shown on SK-M6.

44. Sheet No. P-602 (134 of 309): Remove: Floor drains in the Electrical Room as shown on SK-M7.

45. Sheet No. D-002 (136 of 309):

a. Under the heading ‘EFFLUENT DISINFECTION’ Change the units for ‘UV DOSE’ from ‘mj/cm’ to

‘mJ/cm2’

b. On the pipeline between the ‘DNF Pumping Station’ and the ‘Denitrification Filters’ Add a FM (flowmeter) symbol upstream of the methanol injection.

46. Sheet No. D-003 (137 of 309): In the Post Aeration Tank Add a check valve symbol to the downstream side of the interior wall, and Add a water surface elevation symbol with an average design flow elevation of

1.85 ft and a peak hour elevation of 10.63 ft.

47. Sheet No. D-503 (141 of 309): Delete: Detail 2/D-503 - Rupture Disc Detail in its entirety.

48. Sheet No. D-601 (142 of 309): Change: “MAX STATIC 0.0 FT” to read “MIN STATIC 0.0 FT”.

49. Sheet No. D-602 (143 of 309): PUMP SCHEDULE, EFFL-EP-01 and EFFL-EP-02, SPEED, Delete:

“1800” and Replace with: “1200”.

50. Sheet No. D-3968-101 (151 OF 309): Move grit control panel: “E3968-GCP-01” to the North side of the blower enclosure.

51. Sheet No. D-SCRN-601 (153 of 309): NON-POTABLE WATER SCHEMATIC - Change: The three water supply points to the right of the schematic to read “MECHANICAL SCREEN NO. 2”, “SCREEN WASHING COMPACTOR NO. 2”, and “SCREEN WASHING COMPACTOR NO. 2”.

52. Sheet No. DD-3953-101 (153 of 309): In upper right hand corner - Change: “CONSTRUCTION NOTES” to read “DEMOLITION NOTES”

53. Sheet No. D-3956-101 (156 of 309): Plan 2:

a. Change the location of the 4 inch gravity backwash drain line from the East Wet Well wall to the

North Dry Well wall, as indicated on the Civil Drawings. Pass pipe though the Dry Well into the Wet Well.

b. Add Construction note “2. Field verify all clearance, dimensions and pipe routing.”

c. Add Construction note “3. For the pipe penetration through the exterior Dry Well wall: Find suitable location away from construction joints and water stop, core hole, provide 2 mechanical segmented seals, fill void between seals with non-shrink grout. Wall penetration shall be made water tight. Do not core hole within 18-inches of the existing 18 inch sewer.”

d. Add Construction note “4. Provide supports for the 4 inch gravity backwash drain line inside the Dry Well. Interior pipe shall be Class 53, Flanged Ductile Iron Pipe, Double Cement Lined, and shall be continuously sloped toward the Wet Well.”

e. Add Construction note “5. For the pipe penetration from the exterior Dry Well wall into the Wet Well:

Find suitable location away from construction joints and water stop, core hole, provide 2 mechanical segmented seals, fill void between seals with non-shrink grout. Wall penetration shall be made water tight and provide duckbill check valve.“

f. Add Construction note “6. All hardware for the mechanical segmented seals shall be stainless steel.”

g. Add Construction note “7. Pipe routing inside the existing structure not shown, field coordinate and provide additional fittings as necessary. Pipe routing shall not obstruct existing equipment and it shall not block off access to existing equipment.”

54. Sheet No D-3956-102 (157 of 309), Section A: Change the following items:

a. The centerline elevation of the 16” discharge header from “4.06” to “3.06”

b. The centerline elevation of the 14” discharge from “4.16” to “3.16”

c. Add general note “3. The elevations provided for the 16 inch discharge header and 14 inch discharge are based on available information. Contractor shall test pit the existing 6” force main, see civil drawings for location, and adjust the elevation of the 16 inch discharge header and 14 inch discharge accordingly to miss the existing 6” force main pipe.”

55. Sheet No. D-3960-101 (161 of 309): Section A, Delete reference to: "8" Emergency Overflow", and

Replace with: “12" Emergency Overflow"

56. Sheet No. D-3856-101: Section A, Delete reference to: "8" Emergency Overflow", and Replace with: “12" Emergency Overflow”

57. Sheet No. DD-3962-101 (166 of 309):

a. BID OPTION 4 SECTION Change: Section bubble “A/D-3962-101” to read “A/DD-3962-101”\

b. Add the following Demolition Note “3. REMOVE EX. WEIR GATE OPERATOR ON FORWARD

FLOW WEIR GATE”

58. Sheet No. D-3962-101 (167 of 309): Change the following Note: “EX. GATE OPERATING CRANK” to read “NEW GATE OPERATING CRANK, REPLACE IN-KIND”

59. Sheet No. D-BLCT-101 (170 of 309): In the ‘Blower Building – Plan’, Add two (2) 12-inch manually actuated butterfly valves in the main aeration header, one located between Blowers 1 and 2, and one between Blowers 2 and 3.

60. Sheet No. D-BLCT-601 (171 of 309):

a. In the ‘Aeration Schematic’, Add two (2) 12-inch manually actuated butterfly valves in the main aeration header.

b. Add a: 4-inch manual butterfly valve to each of the two (2) ANX/DEOX zone aeration headers just downstream of the reducer.

c. Revise the main aeration header pipe diameter for each train from 6" to 8". Downstream of the reducer shown in oxic zone 2, the size remains as 6"

61. Sheet No. D-MBBR-101 (174 of 309):

a. EMBRR- MBBR Plan: Add the following general Notes 3: “3. All joints within 20’ of wall castings or bends shall be restrained mechanical joints.”

b. Add a call out note to the drawing at the 24-inch bypass line at the influent end: ‘FLAT SCREEN

OVER PIPE’

c. Add Note: ‘4. PROVIDE FLAT SCREEN OF SIMILAR CONSTRUCTION TO THAT USED IN

THE ANOXIC ZONE TO COVER THE BYPASS PIPELINE INLET.’

d. Add callout directed to the four circles in each Train 1, Oxic Zone 2, and Train 1, Anx/Deox near the agitator system stating ‘ Mixer Access Platform Support Columns

62. Sheet No. DD-3958-101 (176 of 309): In upper right hand corner Change “CONSTRUCTION NOTES” to read “DEMOLITION NOTES”.

63. Sheet No. D-DNFF-101 (179 of 309): Change the following Note: “4” BACKWASH PIPING (BELOW GRADE)” to read “6” BACKWASH PIPING (BELOW GRADE)”

64. Sheet No. D-DNFF-101 (180 of 309): Change the following Note: “4” BACKWASH PIPING (BELOW GRADE)” to read “6” BACKWASH PIPING (BELOW GRADE)”

65. Sheet No. D-DNFF-301 (182 of 309): Change the backwash piping CL. EL. “2.83” to read “3.83”.

66. Sheet No.D-EFFL-301 (191 OF 309): Add equipment identification tag “EFFL-LS-05” next to Lag Pump Start EL. 5.00.

67. Sheet No. M-3956-101 (202 of 309):

a. Change: Location of 12x6 duct slightly to allow clearance for monorail crane as shown on SK-M2.

b. Add Specific Note 6 as follows: “MOUNT AIR HANDLING UNIT AHU-2 AS HIGH AS POSSIBLE

WHILE MAINTAINING CLEARANCE FOR PROPER SPRING ISOLATOR OPERATION.

SUPPLY DUCTWORK IS DESIGNED TO RUN ABOVE THE EXISTING MONORAIL CRANE.

BRANCH SHALL BE ROUTED TO MAINTAIN CLEARANCE TO THE MONORAIL AND NOT

PROVIDE INTERFERENCE WITH ITS OPERATION.”

68. Sheet No. M-BLCT-101 (203 of 309): Add Specific Note 3 as follows: “MOUNT AIR HANDLING UNIT

AHU-3 AS HIGH AS POSSIBLE WHILE MAINTAINING CLEARANCE FOR PROPER SPRING

ISOLATOR OPERATION.”

69. Sheet No. M-DNFP-101 (204 of 309):

a. Add: Floor drain to Analyzer Room as shown on SK-M1.

b. Add: AHU-4 in Electrical Room and CU-4 at grade as shown on SK-M1.

c. Add: Specific Note 1 as follows: “PROVIDE FLOOR DRAIN PIPED BELOW THE SLAB AND

DISCHARGE TO THE WET WELL BELOW. BOTTOM OF PIPING BELOW SLAB SHALL BE

ROUTED AT AN INVERT ELEVATION OF 10' TO BOTTOM OF PIPE. SEE PLUMBING

DRAWINGS AND SPECIFICATIONS FOR PIPING AND DRAIN SCHEDULE.”

d. Add: Specific Note 2 as follows: “MOUNT AIR HANDLING UNIT AHU-4 AS HIGH AS

POSSIBLE WHILE MAINTAINING CLEARANCE FOR PROPER SPRING ISOLATOR

OPERATION.”

70. Sheet No. M-601 (212 of 309): Add: AHU-4 and CU-4 as shown on SK-M8.

71. Sheet No. ESD-101 (217 of 309): Replace in its entirety with new attached Sheet ESD-101.

72. Sheet No. ESD-102 (218 of 309): Replace in its entirety with new attached Sheet ESD-102.

73. Sheet No. ES-101 (219 of 309): Replace in its entirety with new attached Sheet ES-101.

74. Sheet No. ES-102 (220 of 309): Replace in its entirety with new attached Sheet ES-102

75. Sheet No E-SCRN-201 (224 of 309): Indicated on attached Sketch SK-E-4:

a. Changed: All Type X1 light fixtures in the Screen Room to Type X2.

b. Moved Type X1 light fixture from north wall of the Screen Room to door on the east wall of the

Screen Room.

c. Changed the 4 way light switch on the west wall of the Screen Room to a 3 way light switch.

d. Deleted 3 way light switch on north wall of Screen Room.

e. Added 4 way switch adjacent to the door on the east wall of the Screen Room.

f. Changed: Type B light fixture in the Dumpster Room to Type B1.

76. Sheet No. E-3968-101 (226 OF 309): Move grit control panel: “E3968-GCP-01” to the North side of the

77. Sheet No E-3956-101 (229 of 309): Indicated on attached Drawing E-3956-101 dated 07/03/13: Delete Sheet Key Note 4.

78. Sheet No. E-DNFP-101 (242 od 309): Indicated on new attached Drawing E-DNFP-101:

a. Added: AHU-4 and CU-4

b. Added: Sheet Key Note 6

79. Sheet ED-3853-101 (250 of 309): Indicated on attached Drawing E-3853-101…