Laserfiche WebLink
Attorney-Client Privileged <br /> 6. PROPOSED SOIL AND GROUND WATER SAMPLING/FIELD OPERATIONS <br /> TRE proposes to advance two hollow stem auger administered-boring in the following <br /> locations for this reconnaissance soil and ground water sampling project (See Figure 2) <br /> as specified below. <br /> The borings will be advanced at five-foot intervals collecting soil samples in metal liners <br /> using pre-cleaned drilling rods. The drill rods will be clean prior to arriving on site, <br /> between each borehole and before leaving the site.. The auger will be directly <br /> advanced approximately 70'-75' (TRE's review of historical experience in site work in <br /> neighboring properties indicate that ground water was not reached at average depth of <br /> between 50-55 feet bg, therefore, it is anticipated that due to the confining conditions of <br /> the aquifer, groundwater will not be reached until the depth of 70-75 feet bg) below <br /> grade (bg) or until it reaches ground water. <br /> The drilling operations/borings will be supervised and logged by a California <br /> Professional Registered Geologist (PG) using the Unified Soil Classification System <br /> (USCS). Any unusual odors, soil head space PID readings, and or visual signs of <br /> contamination associated with each boring in its specific interval will be noted in the field <br /> logs. Soil samples retained for chemical analysis will be retained in liners sealed with <br /> Teflon paper/plastic end caps, and labeled with a unique field number. Appropriate <br /> chain of custody form (CCF) shall be completed and each sample shall be entered into <br /> the CCF. All samples shall be immediately placed is on crushed ice in a dedicated <br /> cooler in order to maintain an approximate Temperature of 4C before it is transported to <br /> the designated laboratory: Precision Environmental Technology (PET) of Stockton, CA. <br /> Groundwater samples will be collected from the open borehole listed below. The <br /> sampling procedure will involve the following steps: <br /> • The boreholes will be advanced into the uppermost aquifer <br /> • A temporary casing will be used to lower a clean disposable PVC sampling bailer <br /> into the borehole for sampling groundwater. <br /> Page 6 of 21 <br />