### Worker Exposure During Production **of 9**  **- Octadecen**  **- 1**  **- amine,hy** **drochloride (1:1), (9Z) -** 

**CAS No.:41130 -** **29 -** **4 (aka Oley** **l amine HCL)** 

Components of the production process.

**As phalt:**  A mixture of asphalt and other bituminous substances, warmed and fed into the colloidal mill **Stabilizer:** Inert additives such as calcium chloride used as a bulking agent. **Ac id:**  For the production of the new chemical hydrochloric acid is used as an acidify ing agent. **Emulsifier:** The starting amine precursor for the production of the new chemical. **Water Inlet:** Wa ter is the used as the diluent for the production of the new chemical, producing an aqueous solution of the new chemical

. **Batch Soap Tank** : Stabiliz er, a cid, and e mulsifier are mixed with water. The precursor amine is acidified to produce and aqueous solution of the new chemical to serve in the emulsification of asphalt. **Colloidal Mill:** The warmed asphalt formulation is chopped and blended with the aqueous emulsifying agent to produce a homogeneous suspension of asphalt/emulsifier particles in water. **Emulsion:** The final product a stable asphalt emulsion used in the paving industry for “chip sealing” Position #1 **Batch Soap Tank**  Position # 2 Emulsion Tank**Position #1 (**  **batch soap tank on the above**  **diagram )** 

Activity : ‘ Control on addition of the reactants into the mixing tank, s ampling and t esting of the aqueous emulsifier solution containing the PMN chemical involves one worker Form and % : ‘aqueous solution of acidified amine (the new chemical) concentration 0.05

- 0.50% w/w , the pH is adjusted to between pH: 2

- 4

. Wa ter and reactants are piped into the mix tank, pH of the mixture is monitored to determine that the required acidity has been reached both to aid in the complete dissolution of the precursor amines and to convert neutral amines to their respective amine salt. Samples are periodically withdrawn from the mix tank via a valve on the side of the tank. A one gallon container is positioned below the valve, the valve is opened allowing a controlled stream of the mixture to clear the valve . As the valve has cleared a one half cup sample is taken from the stream then the valve is closed. Sample are taken to the lab for analysis. Once the pH reach es the required pH sampling is discontinued

. As needed, t he emulsifier solution is pumped directly to the colloidal mill using a closed system of piping

. The worker at this position is the only one having exposure to the solution containing the new chemical. The precautions and PPE used at thi s exposure point are appropriate to protect the worker from the acidity of hydrochloric acid in the emulsifier solution (pH 2). The worker exposure is limited to the sampling taken to monitor the production process which are of limited duration and freque ncy / production batch. Once the pH of the solution is adjusted to the required pH the solution is piped to the colloidal mill , at which point the new chemical will be incorporated into the asphalt, resulting in no further exposure to the solution of th e emulsifying agent salt

. The amine precursors and their salts are known to be moderately irritating. At the concentration of the amine and its salt the potential for irritation will largely be exposure to the acid aqueous solution pH 2

- 4. PPE

– ‘Rubber gloves, safety glasses, long sleeves and cuffs’ is adequate protection for worker exposure. Frequency and duration of exposure: 4 batches / month, time to produce each batch 2.5

– 3 hours. Wi th current equipment, and production process, the maximum numb er of batches that can be produced / 8 hour work day is 3 batches. Based upon the closed system of piping from the batch mi xing tank to the colloidal mill , where the PMN chemical is incorporated into the asphalt, there is no exposure of workers to the PMN chemical. T

he colloidal milling of the asphalt with the emulsifier solution effectively removes the PMN chemical from the aqueous phase, there is no chan ce of workers being exposed to the PMN chemical by handling the completed emulsion. The following points and activities are added only to complete the description of the worksite in control of the submitter

.**Position # 2**  **( emulsion tank on**  **the above diagram**  **)**

a. Activity: Samplin g and t esting of the f inal e mulsion involves one worker P PE: Rubber gloves, safety glasses, long sleeves and cuffs’ Form and % : Aq ueous a sphalt emulsion containing the emulsifier incorporated @ 0.02

- 0.20% w/w. Emulsion sampling **:** A small cup sample of emulsion is pulled from a port just after the mill for visual and basic evaluation at the start of a production run and if any changes are made, such as a residue change based on viscosity, etc. A gallon sample of emulsion is then pulled from the finished tank for QC/QA evaluation at the end of the run. The sampling procedure includes flushing out the valve into the bucket and then collecting a sample in the container procedure for visual inspection. The emulsion may also be resampled and visual inspected and/or tested later, depending on how long the material remains in the tank. Samples are generally not taken at load out. Excess samples taken for QC/QA purposes are recycled back into the emulsion tank . There is no waste or disposal of the completed emulsion at the production site. ).

b. Activ ity:

- shipment of finished e mulsion involves one worker

. P PE : Rubber gloves, safety glasses, long sleeves and cuffs Form and %: Aqueous a sphalt emulsion containing the emulsifie r inco rporated @ 0.02

- 0.20% w/w. .