Source testers must be able to access ports that meet Method 1 criteria in order to perform required measurements. Safe access to these ports is guaranteed by federal and local laws. Safe access can come in various forms.
Not all means of access will be allowed, applicable, or necessary for a source or even a type of test. To decide whether or not proposed access means will work in a given scenario, consider 1) will the proposed means of access create unnecessary risk for sampling or site personnel and 2) will the proposed means of access allow the test team to conduct measurements that meet the criteria of applicable methods.
Permanent platforms are usually installed on elevated exhausts with regular test requirements. Fixed ladders with appropriate rest platforms and cages are used to access the platforms. Consult a test firm during the design phase of new sources with platforms to determine whether the platform will be large enough for the required testing.
Mobile personnel lifts are a means of access for elevated locations without permanent platforms that require a low to moderate amount of sampling equipment. For large lifts (80 ft+), check for power in the basket prior to rental. Prior to use, ensure that the lift will be operated on firm ground. Identify sensitive equipment in the area, and utilize a spotter when moving.
While extremely versatile, scaffold is best utilized for low-elevation locations that require extensive equipment or are configured such access is impossible with a personnel lift. Scaffolding can be set up almost anywhere and can be configured to specific needs of a test. Ensure the scaffold is by a competent person prior to use to ensure safe and timely testing.
Basic ladders (a-frame, etc.) are the least versatile access method for sampling. Only non-isokinetic methods requiring limited equipment should be performed from a ladder.
Timeliness of the solution may influence how access is provided. Baring cost, it is quicker to pull a personnel lift onto site than have scaffold erected for last minute work.
Cost is another consideration. It is possible that a more expensive access solution will guarantee access, while a less expensive solution only carries a 50% chance of success. In this case, decide whether or not the cost savings will justify the risk of not completing a scheduled test. A test team that mobilizes to a site and is unable to complete a test due to access will still incur (and invoice) costs equal to test preparation, mobilization, and onsite work.
The site and test firm must agree on what is considered safe. Test personnel will use Stop Work Authority if hazards are not mitigated. Project managers and area managers will stand with their teams. Set it up right. Set it up once. Succeed.
