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15 May 2019 <br />AGE Project No. 14-3002 <br />Page 4 of 17 <br />soil boring location, depth, time, date and sampler's initials and then placed in a container <br />with sufficient ice. <br /> <br />Additionally, selected samples were collected using EnCore sampling devices, an EPA- <br />compliant method for sampling under EPA method 5035. After each EnCore sampling <br />device was used, the device was placed in an EnCore sealable bag, labeled and stored <br />in a container with sufficient ice. <br /> <br />Soil sample duplicates were extruded into plastic bags and field-screened for the <br />presence of organic vapors using an organic vapor meter (OVM), equipped with a photo- <br />ionization detector (PID). Additionally, the soil was visually classified in accordance with <br />the Unified Soil Classification System (USCS). PID readings and soil classifications were <br />recorded on boring logs, provided in Appendix D. <br /> <br /> <br />3.2. GRAB GROUNDWATER SAMPLE COLLECTION <br /> <br />Grab groundwater samples were collected from borings B1, B6, B13, B16, B18, B23, B28, <br />B31, B35 and B40; AGE assisted CVRWQCB staff with collecting the groundwater <br />sample from boring B18. Groundwater samples were collected between 10 and 15 feet <br />bsg in B1, B6, B13, B16 and B18; between 13 and 18 feet bsg in B28, B31, B35 and B40; <br />and between 15 and 20 feet bsg in B23. Groundwater samples were collected utilizing a <br />five-foot long, pre-cleaned, one-inch diameter, 0.020-slotted temporary well screen <br />inserted into the borings. Each groundwater sample was extracted using a peristaltic <br />pump and disposable ¼-inch Teflon tubing through the temporary well screen. <br /> <br />Sufficient sample was collected to fill four 40-ml EPA-approved volatile organic analysis <br />(VOA) vials with sample preservative, two 1-liter amber glass containers without <br />preservative, one 1-liter high-density polyethylene (HDPE) container without <br />preservative, one 125-milliliter (ml) HDPE container with preservative, one 250-ml amber <br />glass container with preservative and one 125-ml and 500-ml HDPE containers without <br />preservative. Additionally, groundwater samples from borings B13, B16, and B35 were <br />collected into one additional 1-liter amber glass sample container. Groundwater sample <br />containers were labeled with soil boring designation, date, time and samplers initials and <br />then placed in a container with sufficient ice. <br /> <br /> <br />3.3 LABORATORY ANALYSIS <br /> <br />Soil, waste and groundwater samples were transported under chain-of-custody to Alpha <br />Scientific Corporation (ASC) and McCampbell Analytical, Inc. (MAI; groundwater samples <br />only), both are California Environmental Laboratory Accreditation Program (ELAP)- <br />certified laboratories. Selected soil, waste and groundwater samples were analyzed for <br />the following selected constituents: <br />