140P2026R0028_Site_Visit_Questions_NPS_Response_0002.pdf
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- Solicitation number
- 140P2026R0028
About this file
This document is a Questions and Answers record from a virtual site visit for federal contract opportunity SARA 257238 Tour Stop 7 Drainage Repair, held on February 5, 2026. The Q&A addresses clarifications requested by prospective bidders regarding the solicitation requirements. Two substantive questions were submitted and answered: the first pertained to the missing specification section 01 57 19.12 Noise and Acoustics Management, which the National Park Service (NPS) confirmed would be provided as Addendum 01; the second clarified that the bid does not require a bid guarantee, only payment and performance bonds.
The document also includes the complete text of Specification Section 01 57 19.12 – Noise and Acoustics Management, issued as Addendum 01 effective February 10, 2026. This specification establishes requirements for noise control during construction operations, including definitions of key terms such as daytime (7 A.M. to 9 P.M. weekdays; 9 A.M. to 9 P.M. weekends/holidays) and nighttime hours. Construction operations must minimize noise, with repetitive or intermittent high-level noise restricted to daytime only. Noise limitations at 50 feet include 70 dB(A) for more than 12 minutes per hour and 80 dB(A) for more than 3 minutes per hour. The specification provides maximum permissible noise levels for various earthmoving and materials handling equipment. Ambient noise thresholds are established at the property line: 65 dB(A) daytime and 45 dB(A) nighttime for residential areas; 67 dB(A) daytime and 65 dB(A) nighttime for commercial/industrial areas, with adjustments permitted where existing ambient noise exceeds these levels. Field quality control requires ambient noise measurement and monitoring in accordance with ASTM E1686 and ASTM E1780 standards.
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140P2026R0028 – SARA 257238 Tour Stop 7 Drainage Repair Site Visit Questions
The following questions were submitted via email as a result of the virtual site visit for SARA 257238 held 5 February 2026.
1. Question: The specs do not appear to include the section 01 57 19.12 Noise and Acoustics Management, please provide.
NPS Answer: See attached specification Section 01 57 19.12 Noise and Acoustics Management as part of Addendum 01.
2. Question: Confirming that there is not a bid guarantee for the subject bid. Only payment and performance bonds
NPS Answer: Correct.
SARA 257238 01 57 19.12 - 1
012721 NOISE AND ACOUSTICS MANAGEMENT
SECTION 01 57 19.12 – NOISE AND ACCOUSTICS MANAGEMENT
PART 1 - GENERAL
1.1 SUMMARY
A. Section includes:
1. Special requirements for noise and acoustics management during construction operations.
1.2 DEFINITIONS
A. Ambient noise level: The total noise associated with a given environment, being usually a composite of normal or existing sounds from all sources near and far, excluding the noise source at issue.
B. Daytime: The hours from 7 A.M. to 9 P.M. on weekdays and 9 A.M. to 9 P.M. on weekends and holidays.
C. Nighttime: All non-daytime hours.
D. Property line: The real or imaginary line along the ground surface and its vertical extension, which separates real property owned or controlled by one person from contiguous real property owned or controlled by another person or from any public right-of-way or from any public space.
E. Receiving noise area: Any real property where people live or work and where noise is heard, excluding the project or source area.
PART 2 - PRODUCTS (Not Used)
PART 3 - EXECUTION
3.1 NOISE MANGEMENT
A. Noise Control: Perform construction operations to minimize noise. Perform noise-producing work in less sensitive hours of the day or week as directed by the Contracting Officer CO).
B. Repetitive and/or intermittent, high-level noise: Permitted only during Daytime.
1. Do not exceed the following dB(A) limitations at 50 feet:
Sound Level in dB(A) Time Duration of Impact Noise 70 More than 12 minutes in any hour 80 More than 3 minutes in any hour
2. Maximum permissible construction equipment noise levels at 50 feet:
Julie Skierski Typewritten Text Addendum 01: 2/10/2026
SARA 257238 01 57 19.12 - 2
EARTHMOVING dB(A) MATERIALS HANDLING dB(A) Front Loaders 75 Concrete Mixers 75 Backhoes 75 Concrete Pumps 75 Dozers 75 Cranes 75 Tractors 75 Derricks Impact 75 Scrapers 80 Pile Drivers 95 Graders 75 Jack Hammers 75 Trucks 75 Rock Drills 80 Pavers, Stationary 80 Pneumatic Tools 80 Pumps 75 Saws 75 Generators 75 Vibrators 75 Compressors 75
C. Ambient Noise:
1. Maximum noise levels (dB (decibel)) for receiving noise area at property line shall be as follows:
a. Residential receiving area Daytime: 65 dB
Nighttime: 45 dB
b. Commercial/Industrial receiving area Daytime: 67 dB
Nighttime: 65 dB
c. In the event the existing local ambient noise level exceeds the maximum allowable receiving noise level (dB), the receiving noise level maximum for construction operations shall be adjusted as follows:
d. Residential receiving area: Maximum 3 additional dB above the local ambient as measured at property line.
e. Commercial/Industrial receiving area: Maximum 5 additional dB above the local ambient as measured at the property line.
3.2 FIELD QUALITY CONTROL
A. Assess potential effects of construction noise on visitors and wildlife in accordance with ASTM E1686 and as follows:
1. Ambient noise measurement: Measure at property line at a height of at least four (4) feet above the immediate surrounding surface. Average the ambient noise level over a period of at least 15 minutes.
2. Ambient noise measurement at urban sites: Conduct during morning peak traffic hour between 7 A.M. and 9 A.M. and afternoon peak traffic hour between 4 P.M. and 6 P.M. In addition, conduct a 24-hour measurement at the proposed project site to document the noise pattern throughout the day. Adjust and weight for seasonal and climatic variations.
B. Monitor noise produced from construction operations in accordance with ASTM E1780.
SARA 257238 01 57 19.12 - 3
END OF SECTION 01 57 19.12
| 015719-12-NoiseAndAcousticsManagement-1-27-21-508.pdf |
| PART 1 - GENERAL |
| 1.1 SUMMARY |
| A. Section includes: |
| 1. Special requirements for noise and acoustics management during construction operations. |
| 1.2 DEFINITIONS |
| A. Ambient noise level: The total noise associated with a given environment, being usually a composite of normal or existing sounds from all sources near and far, excluding the noise source at issue. |
| B. Daytime: The hours from 7 A.M. to 9 P.M. on weekdays and 9 A.M. to 9 P.M. on weekends and holidays. |
| C. Nighttime: All non-daytime hours. |
| D. Property line: The real or imaginary line along the ground surface and its vertical extension, which separates real property owned or controlled by one person from contiguous real property owned or controlled by another person or from any public ri... |
| E. Receiving noise area: Any real property where people live or work and where noise is heard, excluding the project or source area. |
| PART 2 - PRODUCTS (Not Used) |
| PART 3 - EXECUTION |
| 3.1 NOISE MANGEMENT |
| A. Noise Control: Perform construction operations to minimize noise. Perform noise-producing work in less sensitive hours of the day or week as directed by the Contracting Officer CO). |
| B. Repetitive and/or intermittent, high-level noise: Permitted only during Daytime. |
| 1. Do not exceed the following dB(A) limitations at 50 feet: |
| 2. Maximum permissible construction equipment noise levels at 50 feet: |
| C. Ambient Noise: |
| 1. Maximum noise levels (dB (decibel)) for receiving noise area at property line shall be as follows: |
| a. Residential receiving area Daytime: 65 dB |
| b. Commercial/Industrial receiving area Daytime: 67 dB |
| c. In the event the existing local ambient noise level exceeds the maximum allowable receiving noise level (dB), the receiving noise level maximum for construction operations shall be adjusted as follows: |
| d. Residential receiving area: Maximum 3 additional dB above the local ambient as measured at property line. |
| e. Commercial/Industrial receiving area: Maximum 5 additional dB above the local ambient as measured at the property line. |
| 3.2 FIELD QUALITY CONTROL |
| A. Assess potential effects of construction noise on visitors and wildlife in accordance with ASTM E1686 and as follows: |
| 1. Ambient noise measurement: Measure at property line at a height of at least four (4) feet above the immediate surrounding surface. Average the ambient noise level over a period of at least 15 minutes. |
| 2. Ambient noise measurement at urban sites: Conduct during morning peak traffic hour between 7 A.M. and 9 A.M. and afternoon peak traffic hour between 4 P.M. and 6 P.M. In addition, conduct a 24-hour measurement at the proposed project site to docum... |
B. Monitor noise produced from construction operations in accordance with ASTM E1780.
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