Laserfiche WebLink
24 December 2014 <br />AGE Project No. 14-3154 <br />Page 3 of 7 <br /> <br />Advanced GeoEnvironmental Inc. <br /> <br />2.2. GRAB GROUNDWATER SAMPLE COLLECTION <br /> <br />Grab groundwater samples were collected from borings AB1, AB2, AB3, AB6, AB7, <br />AB8, AB10, AB12, AB16 and B4 at depths between 6 and 10 feet bsg and at depths <br />between 15 and 20 feet bsg from boring B5 utilizing a four-foot long, 0.5-inch diameter <br />PVC screen (0.010 Slot size) and schedule 40 PVC blank casing. Groundwater samples <br />were extracted from each boring into non preserved 40-ml glass vials and 250-ml plastic <br />containers. Each sample was collected by using inertial action and lowering single-use <br />disposable ¼-inch Teflon tubing with a sampling check-valve through the hollow center <br />of the PVC casing. <br /> <br /> <br />2.3. LABORATORY ANALYSIS <br /> <br />Following soil and groundwater sample collection, each preserved sample sleeve was <br />labeled with the boring location, depth, time, date, and sampler’s initials. Appropriately <br />sealed and labeled samples were placed in a chilled container and transported under <br />chain of custody to Cal Tech Environmental Laboratories (CTEL), a California <br />Department of Public Health (CDPH)-Certified laboratory and were analyzed for the <br />following chemical constituents: <br /> <br /> Total petroleum hydrocarbons quantified as diesel and oil range compounds <br />(TPH-d/o) in accordance with EPA Method 8015 Modified; and <br /> Volatile organic compounds (VOCs), including chlorinated VOCs and “BTEX” <br />compounds and fuel additives/fuel oxygenates (methyl tertiary butyl ether <br />[MTBE], tertiary butyl alcohol [TBA], di-isopropyl ether [DIPE], ethyl tertiary butyl <br />ether [ETBE], tertiary amyl methyl ether [TAME] and lead scavengers 1,2- <br />dichloroethane [1,2-DCA] and 1,2-dibromomethane [EDB]) in accordance with <br />EPA Method 8260B. Volatile organic compounds in accordance with EPA <br />Method 8260 and <br /> Polychlorinated bi-phenols (PCBs) in accordance with EPA Method 8082. <br /> Polynuclear aromatic hydrocarbon (PNA), polycyclic aromatic hydrocarbons <br />(PAH) or semi-volatile organic compounds (SVOCs) in accordance with EPA <br />Method 8270. <br /> California Assessment Metals (CAM 17) CAM 17 Metals Total Threshold Limit <br />Concentration (minimally: lead, cadmium, chromium, nickel and zinc) by EPA <br />Method 6010B/6020/207/208. <br /> <br /> <br />2.5. BORING ABANDONMENT <br /> <br />Following sample collection, each boring was permanently sealed to prevent vertical <br />migration of potential contaminants. Soil borings were destroyed by backfilling with