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' 30 January 2015 AGE Project No. 14-3154 ' Page 3 of 6 2.2. GRAB GROUNDWATER SAMPLE COLLECTION Grab groundwater samples were collected from borings ABI, AB2, AB3, AB6, AB7, ABB, AB10, AB12, and AB16 at depths between 15 and 20 feet bsg utilizing a four-foot long, 0.5-inch diameter PVC screen (0.010 Slot size) and schedule 40 PVC blank casing. Groundwater samples were extracted from each boring into non preserved 40- ml glass vials, one-liter amber glass containers and 250-ml plastic containers. Each sample was collected by using inertial action and lowering single-use disposable '%-inch Teflon tubing with a sampling check-valve through the hollow center of the PVC casing. ' 2.3. LABORATORY ANALYSIS ' Following soil and groundwater sample collection, each preserved sample sleeve or groundwater sampling container was labeled with the boring location, depth, time, date, ' and sampler's initials. Appropriately sealed and labeled samples were placed in a chilled container and transported under chain of custody to Cal Tech Environmental Laboratories (CTEL), a California Department of Public Health (CDPH)-Certified ' laboratory and were analyzed selectively for the following chemical constituents: Total petroleum hydrocarbons quantified as gasoline, diesel and oil range compounds (TPH-g/d/o) in accordance with EPA Method 8015 Modified; and • Volatile organic compounds (VOCs), including chlorinated VOCs and "BTEX" compounds and fuel additives/fuel oxygenates (methyl tertiary butyl ether ' [MTBE], tertiary butyl alcohol [TBA], di-isopropyl ether [DIPE], ethyl tertiary butyl ether [ETBE], tertiary amyl methyl ether [TAME] and lead scavengers 1,2- dichloroethane [1,2-DCA] and 1,2-dibromomethane [EDB]) in accordance with ' EPA Method 826013; • Polychlorinated bi-phenols (PCBs) in accordance with EPA Method 8082. ' . Polynuclear aromatic hydrocarbons (PNA), polycyclic aromatic hydrocarbons (PAH) or semi-volatile organic compounds (SVOCs) in accordance with EPA Method 8270. • California Assessment Metals (CAM 17) CAM 17 Metals Total Threshold Limit Concentration (minimally: lead, cadmium, chromium, nickel and zinc) by EPA Method 6010B/7471. ' 2.4. BORING ABANDONMENT Following sample collection, each soil boring was permanently sealed to prevent vertical ' migration of potential contaminants. Soil borings were destroyed by backfilling with Advanced CeoEnvironmental Inc.