WORK PLANS - Laserfiche WebLink

Home Browse Search

21 January 2004 AGE-NC Project No. 95-0135 Page 4 of 7 -20:25f,-150-mania AIW 9 0)_and 120 mg/kg(B-2-20.25),res a arninatit r opo fie clay ayer, a appr tely-20--feet=bsg.... Since initiation of ground water monitoring in March 2001, ground water elevations have ranged from approximately 26 to 44 feet below mean sea level. The ground water table underlying the site is generally flat, with a low gradient of less than 0.001 ft/ft. Depth to water and ground water elevation are summarized in Table 5. 2.5. GROUND WATER DEPTH AND FLOW DIRECTION Depth to ground water on 28 March 2003 was measured between 60.74 feet and 61.39 feet below the top of the casings; ground water elevations at the site ranged from 33.60 feet below mean sea o� level(msl)in well M1 MT-1 to 34.40 feet below msl in well MW-4.The ground water flow was directed � toward the north wit a hydraulic gradient calculated to be 0.0007 foot/foot. Ground water elevation data from MW,-2'-was not used to determine the gradient;the well is screened at a different interval than wells MW-2 through MW-4. Depth to water and ground water elevation are summarized in Table 5. 3.0. SCOPE OF WORK To assess the vertical extent of hydrocarbon and MTBE-impacted ground water on the site, completion of the following tasks is required: • Permitting and pre-field work activities; • CPT drilling and sample collection; • Laboratory analysis of samples; • Review of the analytical data and; • Preparation of a report of findings. 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES A site assessment boring permit will be obtained from the EHD for the boring location.As required by EHD permitting,a Site Health and Safety Plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration)and with federal(29 CFR 1910.120)and state(title 8, Cal. Code Regs., section 5192) regulations. Advanced GeoEnviron mental,Inc.