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Thanks rbalex for your comments. If the iPad/Otterbox/Drycase were subjected to (and met)by internal Engineering the requirements for PEP2 in ISA-RP12.12.03, in your opinion would this meet requirements for due diligence? Or should this be performed by an outside independent organization.

Safety is a primary focus for me, and I err on the side of safety from a personnel as well as company liability perspective. If it is generally accepted that only Intrinsically Safe devices should be allowed in Cl I Dv 2 locations, then I believe placing an iPad (even encased) without...

Expansion of potential proposed solution: Drycase (drycase.com)

Preface: I'm not an Engineer, but a Quality professional asking the 'stupid' questions to ensure that the decision/direction my group takes is informed. 1. What are/where can I find the regulatory requirements for North America for electronic equipment for use in Class I Division 2 locations...

@BigH If you are correct on the comment of 'excavation', would I still have the expectations that the earthen pit should have: 1. Engineered retention/shoring for vertical walls OR 2. Sloped walls chosen with respect to the soil type/classification ?

@PEInc The pit is lined to prevent brine loss to the surrounding landscape during drilling or flow testing of new geothermal wells. Typical liner is 30 mil PVC. Please review the pictures, as they may better tell the story. The pits are "spec'd" by a Civ Eng, but I'm not sure all...

@MSQUARED48 It is a lined pit, depth ~20 feet, ~130 x 130 ft dimensions. It is in the cut portion of a wellpad.

@MSQUARED48 Assuming soil classification A or B (per 29CFR1929), can the walls be shear/near vertical? Do all walls have to be sloped?

Looking for regulatory restrictions regarding the maximum sloping of earthen pit walls. Industry: Oil/Gas/Geothermal Application: Drilling "reserve" pit, or Geothermal flow "test" pit Concerned about functional AND safety requirements/regulations.