Toxic Gas Purchase Questionnaire

 

Purpose and Instructions

Purpose: The purpose of this questionnaire is to provide EH&S with information on control measures in place for toxic gases prior to purchase and to ensure compliance with the Santa Clara County Toxic Gas Ordinance (TGO). Instructions: 1.    Complete this questionnaire prior to each purchase of a toxic gas. 2.    EH&S will review the questionnaire and contact you to approve the purchase or obtain more information. If you have any questions, please send an email to toxicgases@lists.stanford.edu or contact the Laboratory Safety program at 723-0448. Information on the TGO, including a toxic gas table, is available at https://ehs.stanford.edu/topic/hazardous-materials/toxic-gas

 
 

Purchaser Information

 
 

Stanford SUNet email only, no email alias

 
 
 

Stanford SUNet email only, no email alias

 
 
 
 
 

Toxic Gas to be Purchased

 
 

Provide each gas (abbreviation okay) and percentage in the mixture, including diluent

 
 

Lbs and/or cubic feet at normal temperature and pressure

 
 
 

Standard Operating Procedure (SOP) for Toxic Gas Use

 

An SOP template for toxic gases is available at https://ehs.stanford.edu/wp-content/uploads/sops/SOP-template-toxic-gases.docx. If an SOP has not previously been submitted to EH&S, use this form (https://app.smartsheet.com/b/form/6af14bd85ac64e2b90ddd7f16ee91fdb ) to submit one. An SOP is required for work with Toxic Gases.

 

Confirm users of the toxic gas(es) associated with this order will complete or have completed compressed gas safety training (EHS-2200 or 4875) and all other safety training listed in the SOP prior to working with the toxic gas.

 
 

Inventory

 

Is this the first time this gas is being used for this procedure/experiment?

 

Will the cylinder being ordered increase your current inventory of this gas? EH&S must determine if the quantity of gas being purchased will exceed control area limits.

 

This is a good practice so as to minimize the quantity of hazardous materials in the lab

 

Is the gas being purchased in the lowest concentration possible for the intended use?

 
 

Control Measures

 

Will the gas be purchased with a restrictive flow orifice (RFO) installed in cylinder? Per the TGO, all cylinders of Class I toxic gases, except lecture bottles and materials having a vapor pressure that does not exceed 29 psia, must be equipped with an RFO, if available. This includes cylinders of exempt quantities. If an RFO is not available, the cylinder must be used with a flow-limiting device. RFOs are recommended by EH&S for all toxic gas use. More information on RFOs is available at: • http://www.mathesongas.com/pdfs/products/Restrictive-Flow-Orifices.pdf • http://www.airproducts.com/company/Sustainability/environment-health-and-safety/~/media/Files/PDF/company/safetygram-46.pdf

 

Are the piping, fittings, and equipment compatible with the gas and able to withstand the temperatures and pressures of the procedure?

 

Are there anchored racks or other measures in place for securing cylinders?

 

Are the gas cylinder, piping, and equipment using the gas all located within a laboratory fume hood? This is requested for informational purposes. This control measure is appropriate for some uses.

 
 

Hazardous Waste Minimization

 

Is the gas being purchased in a returnable cylinder? Check with the vendor.