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Cleanup in Vulnerable Communities'Initiative Discovery Project Reference:Favorite Cleaners and Enforcement Discovery Investigation Work Plan Project Number:60688620 • Team members and their responsibilities; • Time of Subject Property arrival/entry on-site and time of Subject Property departure; • Other personnel on-site; • Weather conditions including air temperature, precipitation,or high wind conditions; • A summary of any on-site meetings; • Deviations from sampling plans or site safety plans; • Changes in personnel and responsibilities as well as reasons for the changes; • Levels of safety protection; and • Calibration readings for any equipment used and equipment model and serial number. At a minimum,the following information will be recorded during the collection of each sample as applicable: • Sample identification number; • Sample location and description; • Subject Property sketch showing sample location and measured distances to physical reference points; • Sampler name(s); • Date and time of sample collection; • Designation of sample as composite or grab; • Type of sample(i.e., matrix); • Type of preservation; • Type of sampling equipment used; • Lot numbers of vendor-supplied sample containers or specialty-grade water; • Field observations and details important to analysis or integrity of samples(e.g., heavy rains, odors, colors); • Instrument readings(e.g., PID); • Chain-of-custody form numbers; • Shipping arrangements(by overnight courier delivery company including air bill number, or laboratory pickup including name of personnel and time of departure); and • Recipient laboratory(ies). 3.2.9.2 Chain-of-Custody Records Chain-of-custody records are used to document sample collection and shipment to the laboratory for analysis.A chain-of-custody record will accompany each sample shipment in order to identify the contents of each shipment and maintain the custodial integrity of the samples.A sample is considered to be in someone's custody if it is either in someone's physical possession, in someone's view, locked up, or kept in a secured area that is restricted to authorized personnel. Until receipt by the laboratory,the custody of the samples will be the responsibility of the sample collector or courier. After placement of each sample in its protective plastic bag,the bag will be sealed with tape placed about the end of the bag.The shipping containers in which samples are stored(usually a sturdy picnic cooler or ice chest)will also be sealed with evidence tape any time the containers are not in someone's possession or view and during shipment to the laboratory.These seals will be signed and dated. Samples will be shipped to Eurofins Air Toxics, Inc. in Folsom, California,for analysis. Prepared for: California Department of Toxic Substances Control AECOM 23