This note can still be found on the Fiberglass Tank and Pipe Institute's website: www.fiberglasstankandpipe. com

Standards by Others:
The following Recommended Practices are subject to the Notices and Disclaimers at the end of each printed document. Users should read the Notices and Disclaimers before use of any portion of the Recommended Practice.

RP 2007-1 Recommended Practice for the In-service Inspections of Aboveground Atmospheric Fiberglass Reinforced Plastic (FRP) Tanks and Vessels.

The website goes on to say to explain that they have transfered ownership:

This Recommended Practice was developed for the Fiberglass Tank & Pipe Institute by Curran Consulting Ltd. beginning in 2003 to respond to requests from aboveground fiberglass tank & vessel owners, operators, engineering companies, and governmental bodies for in-service fiberglass atmospheric pressure tanks and vessels. As part of the development process, a Recommended Practice Peer Review Group was formed that included representatives from the U.S. Environmental Protection Agency’s Office of Solid Waste and Emergency Response; N.Y. State Dept. of Environmental Conservation’s Spill Response & Bulk Storage Tank Section, Lyondell Chemical, Inc., two fiberglass inspection companies, three fiberglass consultants, engineering companies, and both Institute and non-Institute aboveground fiberglass tank manufacturers. Members of the Recommended Practice Peer Review Group shared their fabrication, operation and maintenance expertise on aboveground fiberglass tanks in corrosion-resistant applications.

In 2007, the Recommended Practice was approved by the Recommended Practice Peer Review Group after rounds of public and stakeholders comment and responses to those comments. The Recommended Practice subsequently was approved by the Fiberglass Tank & Pipe Institute.

It also has this footnote to explain the name change:

Footnote: FT&V RP 2007-1 was formally known as FTPI RP 2007-1 where the “P” included, but the RP did not address, “piping.” FT&V is for the inspection of atmospheric pressure FRP tanks and vessels, not piping. Piping may be inspected by following API 570 “Piping Inspection Code: In-service Inspection, Rating, Repair and Alteration of Piping Systems (steel & FRP).”

FT&V RP 2007-1: The Recommended Practice includes recommended inspector qualifications, periodic preventive maintenance inspections, trained personnel integrity inspections, external inspections, internal inspections, and alternate non-intrusive inspection methods. The document also includes report forms for monthly, annual and periodic preventive maintenance inspections that are required to be performed by a trained inspector, and a section on aboveground fiberglass tank fabrication information.

And finally, thier website gives a thouough description of the recommended practice.

The purpose of this Recommended Practice is to provide procedures for conducting periodic preventive maintenance (PM) inspections and Trained Inspections of fiberglass reinforced plastic (FRP) atmospheric tanks and vessels in corrosive industrial and commercial service after a set period of time and when there is a change of service.  The procedures are intended to:

Minimize maintenance costs,
Ensure compliance with environmental and safety requirements,
Minimize system failures, and
Ensure that proper engineering, construction and maintenance practices are in place.

Just in case they have changed thier website, here is a picture of it as of March 29, 2018: