Any information on chalk mountain services

No....CM serves at the pleasure of a sole company, to wit, EOG. EOG doesn't even poke their own holes. They don't haul their own salt water or oil either. Flow back operators are contractors and the leases for the most part are maintained by Renegade and other contractors.

 

They will protect you, but by the time your H2s monitor goes off (or the plant sirens go off) more than likely you'll already have a lung full and be on your way to the grave. It is a very heavy gas and most wear their expensive active monitors on their hats or shirt pockets where they are safe from accidental damage but useless in warning the wearer.

• 20 ppm is the acceptable ceiling concentration established by OSHA.
• 50 ppm is the acceptable maximum peak above the ceiling concentration for an 8 hour shift, with a maximum duration of 10 minutes.
• 50–100 ppm leads to eye damage.
• At 100–150 ppm the olfactory nerve is paralyzed after a few inhalations, and the sense of smell disappears, often together with awareness of danger.
• 320–530 ppm leads to pulmonary edema with the possibility of death
• 530–1000 ppm causes strong stimulation of the central nervous system and rapid breathing, leading to loss of breathing.
• 800 ppm is the lethal concentration for 50% of humans for 5 minutes exposure (LC50).
• Concentrations over 1000 ppm cause immediate collapse with loss of breathing, even after inhalation of a single breath. Cortical pseudolaminar necrosis, degeneration of the basal ganglia and cerebral edema have also been shown.

 

A Cartridge Respiratory is meant to protect the wearer from Respirable Hazards (silica dust, benzene, methanol, etc..). Supplied Air Respirators are meant to protect the user from Inhalation Hazards (gaseous toxins such as H2S/SO2 are in that category).
No, one can not get a good seal with either type with facial hair.
H2S monitors (typically 2 or or 4 gas) SHOULD be worn as close to the breathing zone as possible. Early warning is key to rapid evacuation in an emergency situation.
EOG does not own Chaulk Mountain and they don't only work exclusively for EOG.
Poke their own holes? Pray tell which Operator short of PNR "pokes their own holes"? Every operator out there uses drilling contractors.