Laserfiche WebLink
22 March 2017 <br />AGE Project No. 98-0448 <br />Page 3 of 5 <br />of each newly installed well casing (well head) will be surveyed to determine its elevation <br />relative to North American Vertical Datum 88. An as built diagram of the proposed <br />construction of the proposed wells has been included as Figure 5. <br />2.4. GROUNDWATER SAMPLING AND ANALYSIS <br />Following the installation of the new monitoring well, groundwater monitoring and <br />sampling activities will be conducted at the wells on a quarterly basis for a minimum of <br />one year (four sampling events); monitoring activities will include recording depth to <br />groundwater measurements and collection of groundwater samples for laboratory <br />analysis by a CDPH-certified laboratory. The samples were analyzed for: <br />Total petroleum hydrocarbons quantified as gasoline (TPH-g), in accordance with <br />EPA Method 8015M; and <br />Volatile organic compounds (VOCs) including, benzene, toluene, ethylbenzene <br />and total xylenes (BTEX) and fuel additive 1,2-dichloroethane (1,2-DCA) in <br />accordance with EPA Method 8260B. <br />2.5. PREPARATION OF REPORT OF FINDINGS <br />A report documenting the well installation, development and survey will be prepared <br />following performance of field work and receipt of all applicable data. Additionally, <br />quarterly reports will be prepared following each groundwater monitoring event. Each <br />report will include a description of work performed and the results of the groundwater <br />sampling and analysis. Conclusions and recommendations will also be included, if <br />applicable for each report. All reports will be in a format acceptable to the RVVQCB, and <br />will be reviewed and signed by a California Professional Geologist. <br />3.0. FIELD PROCEDURES <br />All field procedures will be overseen by an AGE representative under the supervision of <br />a California Professional Geologist. Procedures for boring advancement, soil sample <br />collection, well installation, well development and well sampling are described below. <br />3.1. BORING ADVANCEMENT AND SOIL SAMPLING <br />Utilizing a truck-mounted, hollow-stem auger drill rig (CME-75 High Torque Drill Rig) <br />equipped with 8.25-inch diameter hollow-stem augers, one soil boring will be advanced <br />to a depth of approximately 130 feet bsg.