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Cleanup in Vulnerable Communities'Initiative Discovery Project Reference:Favorite Cleaners and Enforcement Discovery Investigation Work Plan Project Number:60688620 • Sample containers will be placed in clear, plastic, leak-resistant bags prior to placement in the ice chest. Sample sleeve liner caps or container screw caps will be checked for tightness and sealed prior to placing the sample in the bag.A self-adhesive custody seal will be placed about the end of each plastic bag.All custody seals will be signed and dated. • Samples to be shipped will be placed in a sturdy cooler lined with a large plastic trash bag prior to placing samples therein. The bottom of the cooler will be lined with bubble wrap. Glass sample containers will be wrapped in bubble wrap. Empty space in the cooler will be filled with bubble wrap or Styrofoam peanuts to prevent movement and breakage of samples during shipment. • Ice or"Blue Ice"packs will be placed in double leak-resistant plastic bags and included in the coolers to keep samples at a chilled temperature of 4 degrees Celsius(°C)plus or minus 2°C during transport to the analytical laboratory.When ice is used,the drain plug of the cooler will be secured with glass fiber tape to prevent melting ice from leaking out of the cooler. • The chain-of-custody form will be placed in a water-resistant plastic bag and taped on the inside of the lid of the cooler. • Strapping and/or DTSC evidence tape(or equivalent)will be placed around each cooler to secure the lid prior to transport to the laboratory. • A self-adhesive custody seal will be placed across the front closure of the cooler any time it is not in someone's possession or view before shipping. Just prior to shipping, custody seals will be affixed to the front, right, and back of the cooler.All custody seals will be signed and dated. To check the potential effects of sample transportation and handling on data quality, a temperature blank will be enclosed in each sample-shipping container when samples requiring preservation by chilling are transported.The temperature blank will be composed of a 40-milliliter vial filled with distilled or potable tap water and clearly marked to indicate its purpose to the laboratory. The temperature blank will be placed next to the investigation samples during packaging. The temperature of the water in the temperature blanks will be recorded upon arrival at the laboratory. The target sample temperature is 4°C plus or minus 2°C. Every effort will be made to transport the samples to the analytical laboratory at the end of each sampling day. However,for sampling days that continue after operating hours of the laboratory,the samples will be stored overnight in a secured location(e.g., in a locked office) under appropriate chain-of-custody procedures, and the samples will be shipped to the laboratory during the next day. Prior to overnight storage,the cooler(s)will be restocked with new ice or Blue Ice to maintain the groundwater samples in a chilled state of 4°C plus or minus 2°C.The sample collector will check the temperature blank inside of each cooler at the beginning of the evening and in the morning, and the temperature readings will be recorded in the field logbook.Alternately, samples may be shipped to the laboratory by overnight courier under the chain-of-custody requirements specified herein. 3.2.9 Sample Documentation Sample documentation include field forms, chain-of-custody records, and photographs, as described in the sections below. 3.2.9.1 Field Forms Field forms will document where,when, how, and from whom any vital project information was obtained. Documentation will be complete and accurate enough to permit reconstruction of field activities. Documentation will be legible,written in black ink, and signed by the individual making the entries. Language will be factual,objective, and free of personal opinions or other terminology, which might prove inappropriate. If an error is made, corrections will be made by crossing a line through the error and entering the correct information. Corrections will be dated and initialed. No entries will be obliterated or rendered unreadable. Field form information will include at a minimum the following for each day: • Subject Property name and address; • Recorder's name; Prepared for: California Department of Toxic Substances Control AECOM 22