Question Answer Comments Action needed/Taken Are deliveries of chemicals Establish a policy that an authorized person, and other supplies made in designated by the water system, must the presence of PWS accompany all deliveries. Verify the credentials personnel? of all drivers. This prevents unauthorized personnel from having access to the water system. Have you discussed with Verify that your suppliers take precautions to your supplier(s) ensure that their products are not procedures to ensure the contaminated. Chain of custody procedures for security of their products? delivery of chemicals should be reviewed. You should inspect chemicals and other supplies at the time of delivery to verify they are sealed and in unopened containers. Match all delivered goods with purchase orders to ensure that they were, in fact, ordered by your water system. You should keep a log or journal of deliveries. It should include the driver’s name (taken from the driver’s photo I.D.), date, time, material delivered, and the supplier’s name. Are chemicals, particularly All chemicals should be stored in an area those that are potentially designated for their storage only, and the area hazardous or flammable, should be secure and access to the area properly stored in a secure restricted. Access to chemical storage should be area? available only to authorized employees. You should have tools and equipment on site (such as a fire extinguisher, drysweep, etc.) to take immediate actions when responding to an emergency. Do you monitor raw and Monitoring of raw and treated water can treated water so that you establish a baseline that may allow you to know can detect changes in water if there has been a contamination incident. quality? Some parameters for raw water include pH, turbidity, total and fecal coliform, total organic carbon, specific conductivity, ultraviolet adsorption, color, and odor. Routine parameters for finished water and distribution systems include free and total chlorine residual, heterotrophic plate count (HPC), total and fecal coliform, pH, specific conductivity, color, taste, odor, and system pressure. Chlorine demand patterns can help you identify potential problems with your water. A sudden change in demand may be a good indicator of contamination in your system. For those systems that use chlorine, absence of a chlorine residual may indicate possible contamination. Chlorine residuals provide protection against bacterial and viral contamination that may enter the water supply.
Question Answer Comments Action needed/Taken Are deliveries of chemicals and other supplies made in the presence of PWS personnel? Establish a policy that an authorized person, designated by the water system, must accompany all deliveries. Verify the credentials of all drivers. This prevents unauthorized personnel from having access to the water system. Have you discussed with your supplier(s) procedures to ensure the security of their products? Verify that your suppliers take precautions to ensure that their products are not contaminated. Chain of custody procedures for delivery of chemicals should be reviewed. You should inspect chemicals and other supplies at the time of delivery to verify they are sealed and in unopened containers. Match all delivered goods with purchase orders to ensure that they were, in fact, ordered by your water system. You should keep a log or journal of deliveries. It should include the driver’s name (taken from the driver’s photo I.D.), date, time, material delivered, and the supplier’s name. Are chemicals, particularly those that are potentially hazardous or flammable, properly stored in a secure area? All chemicals should be stored in an area designated for their storage only, and the area should be secure and access to the area restricted. Access to chemical storage should be available only to authorized employees. You should have tools and equipment on site (such as a fire extinguisher, drysweep, etc.) to take immediate actions when responding to an emergency. Do you monitor raw and treated water so that you can detect changes in water quality? Monitoring of raw and treated water can establish a baseline that may allow you to know if there has been a contamination incident. Some parameters for raw water include pH, turbidity, total and fecal coliform, total organic carbon, specific conductivity, ultraviolet adsorption, color, and odor. Routine parameters for finished water and distribution systems include free and total chlorine residual, heterotrophic plate count (HPC), total and fecal coliform, pH, specific conductivity, color, taste, odor, and system pressure. Chlorine demand patterns can help you identify potential problems with your water. A sudden change in demand may be a good indicator of contamination in your system. For those systems that use chlorine, absence of a chlorine residual may indicate possible contamination. Chlorine residuals provide protection against bacterial and viral contamination that may enter the water supply.
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