Procedure 1. Analyze each test so- lution at regular intervals to provide a minimum of six measurements with the extent of hydrolysis between 20 to 70 percent. Rates should be rapid enough so that 60 to 70 percent of the chemical is hydrolyzed in 672 hours.
Procedure 1. I. Police Related Employment
a. Temporary (city property)
i. Xxxxx be coordinated through the designee of the Police Chief.
ii. Responsibilities of the designee of the Police Chief are to:
1. Provide names of volunteers for each event based upon the order of request to participate.
2. Provide for wages and working conditions consistent with the law enforcement function.
3. Provide for notification of the Communication Center when officers report for their tour of duty.
b. Temporary (non-city property)
i. May be coordinated by the individual member involved.
ii. Responsibilities of the coordinator are to:
1. Provide for wages and working conditions consistent with the law enforcement function.
2. Notify the Communications Center with reporting for duty as to the location, length of tour of duty and number of the vehicle being used.
Procedure 1. Experiments will be performed in a lab-washing machine, based on the international standard ISO 105-C06:1994 for determining color fastness in commercial and industrial laundering followed by a rinsing cycle (GyroWash, from Xxxxx Xxxx). This method aims at studying the transference of color from the fabric to an adjacent fabric. In our case, we will not include a reference textile because the goal is to evaluate the release of nanomaterials to the water compartment. The standard describes a series of possible tests, and initial conditions will be established according to the literature (e.g. 40˚C for 30 min). The experiments are commonly conducted in stainless steel bottles in which approximately 8 g of fabric are introduced together with 120 mL of detergent solution (ECE Color Fastness Test Detergent, 4 g/L) prepared in distilled water type II (electrical conductivity ≤1μS/cm @ 25°C). In this test, 10 stainless steel balls are as well included. In proof of concept tests it has been confirmed by ICP-MS that no release of Ti and Ag from both the containers and the balls occur during the experiments. Different washing cycles will be applied to the textiles and the presence and concentration of released nanoparticles into the washing solution will be determined, and compare to that fraction remaining on the surface of the fabrics. From this data, the source term of the process releasing nanoparticles is made available, which is essential for exposure modelling among others.
Figure 1: GyroWash machine used to perform the lab-washing experiments in procedure 1.
