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CAMBRIA collected at five-foot intervals for soil description, possible chemical analyses, and organic vapor screening with a photo-ionization detector(PID) Cambria will prepare an exploratory boring log for each well, and PID measurements will be recorded on the boring logs Soil samples designated for chemical analyses will be retained in stainless steel or brass sample tubes The tubes will be covered on both ends with Teflon sheets and plastic end caps Soil samples will be labeled, entered onto a chain-of-custody record, and placed into a cooler with ice for transport to a State of California certified laboratory for analyses A standard two-week turn- around time will be requested for laboratory results Monitoring Well Installation. Well boring MW-12 will be drilled to approximately ten feet below first encountered groundwater Based on the second quarter 2003 monitoring event, depth to groundwater beneath the site is approximately 34 fbg Well boring MW-13 will be drilled to 100 fbg to assess the vertical extent of petroleum hydrocarbons in groundwater beneath the site Well MW-12 will be constructed using two-inch diameter Schedule 40 PVC casing and will be screened approximately five feet above and ten feet below first encountered groundwater Well MW-13 will be constructed using four-inch diameter Schedule 80 PVC casing and will be screened approximately from 90 to 100 fbg, based on soil types at that depth The sandpack in each well will be placed from the bottom of the well screen up to two feet above the top of the well screen followed by a two-foot thick bentonite seal and cement grout to grade Actual well construction details will be based on field conditions during drilling Each well will be secured with a locking cap under a traffic-rated well box Well Development and Sampling Blaine Tech Services, Inc (Blaine) of San Jose, California will develop the new groundwater monitoring wells prior to sampling After well development, Blaine will sample the site groundwater monitoring wells according to the existing sampling schedule and submit the samples to a State of California certified laboratory for chemical analyses Chem tcal Analyses: Groundwater samples and selected soil samples from MW-12 and MW-13 will be analyzed for TPHg, benzene, toluene, ethylbenzene, xylenes (BTEX), and fuel oxygenates (MTBE, tertiary amyl methyl ether, ethyl tertiary butyl ether, tertiary butyl alcohol, and di-isopropyl ether) by EPA Method 8260B Groundwater samples from the existing wells (MW-1 through MW-11 and VEW-2) will be analyzed per the revised protocol discussed below Revised Groundwater Monitoring Program As iequcsted by SJCEHD, groundwater samples from all wells were analyzed for PCE during the third quarter 2003 groundwater monitoring 0854 5