eCFR Reference Browser

---

title: "40 CFR §1065.630"

source: "https://www.ecfr.gov/current/title-40/section-1065.630"

title_number: "40"

volume_number: "37"

chapter_number: "Unknown"

subchapter_code: "U"

subchapter_subject: "AIR POLLUTION CONTROLS"

part_code: "1065"

part_subject: "ENGINE-TESTING PROCEDURES"

subpart_code: "G"

subpart_subject: "Calculations and Data Requirements"

section_number: "1065.630"

section_subject: "Local acceleration of gravity."

cfr_reference: "40 CFR 1065.630"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Part 1060 to End"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

(a)The acceleration of Earth's gravity, a

g, varies depending on the test location. Determine a

g at your location by entering latitude, longitude, and elevation data into the U.S. National Oceanographic and Atmospheric Administration's surface gravity prediction Web site at http://www.ngs.noaa.gov/cgi-bin/grav_pdx.prl.

(b)If the Web site specified in paragraph (a) of this section is unavailable, you may calculate a

g for your latitude as follows:

§1065.630 - Local acceleration of gravity.