A system for guiding collection of a hazardous contaminant sample from a test surface, comprising: a template to be placed on the test surface, the template including a substrate having an outer perimeter and an inner perimeter with edges of the inner perimeter defining an open area configured to demarcate a test area on the test surface for the collection of the hazardous contaminant sample, wherein the open area permits collection of the hazardous contaminant sample from the test surface through the open area, a sample acquisition pad (805A, 805B, 805C) positioned along one of the edges of the inner perimeter and configured to wick liquid applied to the test area toward the outer perimeter of the substrate, and an indicator portion (820A, 820B, 820C) positioned to receive the liquid from the sample acquisition pad (805A, 805B, 805C), the indicator portion (820A, 820B, 820C) configured to undergo optically-detectable change in appearance responsive to a condition of the liquid; and a reader device including an imaging device, at least one computer-readable memory having stored thereon executable instructions, and one or more processors in communication with the at least one computer-readable memory and configured to execute the instructions to cause the reader device to cause the imaging device to capture image data representing the indicator portion, determine the change in appearance based on analyzing the image data, determine the condition of the liquid based on the change in appearance, and display a test result indicating the presence or concentration of the hazardous contaminant based on the determined condition of the liquid. a template to be placed on the test surface, the template including a substrate having an outer perimeter and an inner perimeter with edges of the inner perimeter defining an open area configured to demarcate a test area on the test surface for the collection of the hazardous contaminant sample, wherein the open area permits collection of the hazardous contaminant sample from the test surface through the open area, a sample acquisition pad (805A, 805B, 805C) positioned along one of the edges of the inner perimeter and configured to wick liquid applied to the test area toward the outer perimeter of the substrate, and an indicator portion (820A, 820B, 820C) positioned to receive the liquid from the sample acquisition pad (805A, 805B, 805C), the indicator portion (820A, 820B, 820C) configured to undergo optically-detectable change in appearance responsive to a condition of the liquid; and a substrate having an outer perimeter and an inner perimeter with edges of the inner perimeter defining an open area configured to demarcate a test area on the test surface for the collection of the hazardous contaminant sample, wherein the open area permits collection of the hazardous contaminant sample from the test surface through the open area, a sample acquisition pad (805A, 805B, 805C) positioned along one of the edges of the inner perimeter and configured to wick liquid applied to the test area toward the outer perimeter of the substrate, and an indicator portion (820A, 820B, 820C) positioned to receive the liquid from the sample acquisition pad (805A, 805B, 805C), the indicator portion (820A, 820B, 820C) configured to undergo optically-detectable change in appearance responsive to a condition of the liquid; and a reader device including an imaging device, at least one computer-readable memory having stored thereon executable instructions, and one or more processors in communication with the at least one computer-readable memory and configured to execute the instructions to cause the reader device to cause the imaging device to capture image data representing the indicator portion, determine the change in appearance based on analyzing the image data, determine the condition of the liquid based on the change in appearance, and display a test result indicating the presence or concentration of the hazardous contaminant based on the determined condition of the liquid. an imaging device, at least one computer-readable memory having stored thereon executable instructions, and one or more processors in communication with the at least one computer-readable memory and configured to execute the instructions to cause the reader device to cause the imaging device to capture image data representing the indicator portion, determine the change in appearance based on analyzing the image data, determine the condition of the liquid based on the change in appearance, and display a test result indicating the presence or concentration of the hazardous contaminant based on the determined condition of the liquid. cause the imaging device to capture image data representing the indicator portion, determine the change in appearance based on analyzing the image data, determine the condition of the liquid based on the change in appearance, and display a test result indicating the presence or concentration of the hazardous contaminant based on the determined condition of the liquid.