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J 14 October 2014 AGE Project No , 11 - 1847 Page 3 of 6 The proposed soil boring and monitoring well locations are illustrated in Figure 3 . ' ~ Selected soil samples from the deep soil borings will be analyzed by a State of California Department of Public Health (CDPH)-certified laboratory for the following constituents : • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH -g and TPH-d , respectively) in accordance with EPA Method 8015M ; and • Benzene , toluene , ethylbenzene , and total xylenes ( BTEX) , naphthalene, fuel 1 additives di-isopropyl ether (DIPE) , tertiary-amyl methyl ether (TAME) , and 1 , 2- dichloroethane ( 1 , 2- DCA) in accordance with EPA Method 8260B . q1 ? 4 Laboratory reports of soil analysis , testing methods , laboratory quality assurance/quality control (QA/QC) reports , and sample chain of custody documentation will be presented I n a report of findings and recommendations . t: -1 2 . 3 . MONITORING WELL INSTALLATION , DEVELOPMENT, AND SURVEY Adjacent to each deep off-site soil boring , a second pilot soil boring will be advanced and single-completed as shallow groundwater monitoring wells . The proposed monitoring wells will be screened at depths of approximately 20 feet to 40 feet bsg . Depth of the screened interval may vary or be reduced overall according to hydrogeologic conditions encountered while drilling . Following installation , each well will _i be developed to maximize water flow and minimize the amount of fine-grained sediment drawn into the well during pumping or bailing . The top of each newly installed well casing (well head) will be surveyed to determine its elevation relative to North American Vertical Datum 88 . An as built diagram of the proposed construction of the proposed wells has been included as Figure 4 . 2 .4 . GROUNDWATER SAMPLING AND ANALYSIS I Following the installation of the new monitoring wells , groundwater monitoring and sampling activities will be conducted at the wells on a quarterly basis for a minimum of one year (four sampling events) ; monitoring activities will include recording depth to - groundwater measurements and collection of groundwater samples for laboratory analysis by a CDPH-certified laboratory for the analytes noted in Section 2 . 2 . Advanced GeoEnvironmental Inc.