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EKM. <br /> 1 �1511111 <br /> Mr James Barton <br /> July 30, 2004 <br /> Page 2 <br /> t screened for the presence of volatile organic compounds (VOCs) using a photolonization <br /> detector (PID) Lithologic descriptions, PID readings, and other pertinent drilling information will <br /> be recorded on a soil boring log Field methods and procedures to be used by ENSR during <br /> 1 drilling and installation of the proposed well are summarized in Attachment A <br /> Soil Sample Analysis <br /> Selected soil samples collected from soil boring MW-9R will be submitted to California <br /> 1 Laboratory Services (CLS) in Rancho Cordova, California under chain-of-custody protocol Soil <br /> samples will be analyzed for benzene, toluene, ethylbenzene, and total xylenes (BTEX) using <br />' EPA Method 8021, total petroleum hydrocarbons as gasoline (TPHg) by EPA Method 8015 <br /> Modified and methyl tertiary butyl ether (MtBE) using EPA Method 82608 Additionally, <br /> selected samples will be analyzed for total lead using EPA Method 6010B for waste disposal <br />' purposes Field methods and procedures to be used by ENSR during drilling and Installation of <br /> the proposed well are summarized in Attachment A <br /> Monitorinq Well Installation <br /> Groundwater monitoring well MW-9R will be constructed using 2-inch diameter, flush-threaded, <br /> Schedule 40 PVC casing installed to a total depth of approximately 70 feet bgs The well will be <br /> screened from approximately 50 to 70 feet bgs with a 0 02-inch machine slotted casing No 3 <br /> Monterey sand filter pack will be placed from the base of the borings to approximately 4 feet <br /> above the top of the well screen A 2-feet thick bentonite seal will be emplaced above the filter <br /> 1 pack, and the remaining annular space will be filled with cement grout containing approximately <br /> five percent bentonite to approximately 1-foot bgs The top of the well will be completed with a <br /> flush grade traffic rated vault box set In concrete Proposed well construction details are <br /> 1 presented in Attachment B <br /> Well Development and Sampling <br /> 1 Groundwater monitoring well MW-9R will be developed and sampled according to field methods <br /> and procedures outlined in Attachment A <br /> ' Groundwater Sampling Analytical Results <br /> Groundwater samples collected from well MW-9R will be submitted to CLS for analysis of TPHg <br /> by EPA Method 8015 Modified and volatile organic compounds using EPA Method 8260B <br /> Groundwater samples will be collected using procedures described in Attachment A <br /> Well survey <br /> Groundwater monitoring well MW-9R will be surveyed by a California licensed land surveyor in <br /> accordance with State of California Assembly Bill AB2886 prior to the fourth quarter 2004 <br /> monitoring and sampling event The top-of-casing (TOC) elevation of the monitoring well and <br /> ground surface elevation will be surveyed relative to mean sea level within 0 01 foot <br /> J%Projects10694015098-293kFinaRReports15098 Well install MW-9R Work Plan doc <br /> Y,ar-of=xralret7rR iii Envuonmenifi'Service, <br />