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Michael Infurna <br /> October 20,2003 <br /> Well Sampling and Water Level Measurement. A groundwater sample will be collected from the <br /> newly installed monitoring wells following completion of well development. Prior to purging and <br /> sampling, the depth to the water table will be measured to within 0.01-foot relative to a reference <br /> point on each monitoring well. The wells will be purged and sampled in accordance with the field <br /> methods and procedures described in Enclosure B. The groundwater samples will be submitted to <br /> Kiff for analysis of BTEX,TPHg,and MTBE using EPA Method 8260. <br /> Surveying of Wells. The elevation of a reference point on the monitoring well and adjacent ground <br /> surface will be surveyed at each newly installed well by an appropriately-licensed land surveyor. To <br /> comply with State regulation AB2886, Delta will request the licensed surveyor to reference the <br /> locations of the newly installed wells and soil borings to the California State Coordinate System <br /> using Global Positioning Satellite (GPS) surveying. The top of casing (TOC) elevations of the <br /> monitoring wells and ground surface elevations will be surveyed relative to MSL within 0.01-foot. <br /> Schedule <br /> Delta has scheduled a drilling subcontractor for the week of October 27, 2003. Delta requests <br /> expedited approval of this work plan by the SJEHD and have submitted a drilling permit application <br /> and fee to facilitate the approval process. A report summarizing the results of the investigation will <br /> be submitted to the regulatory agencies 60 days following the completion of the proposed scope of <br /> work. This report will include conclusions. <br /> Remarks/Signatures <br /> The interpretations contained in this report represent our professional opinions, and are based in <br /> part, on information supplied by the client. These opinions are based on currently available <br /> information and are arrived at in accordance with currently accepted hydrogeologic and engineering <br /> practices at this time and location. Other than this,no warranty is implied or intended. <br /> If you have any questions regarding this project,please contact John Smith at(916)536-2617 or Jim <br /> Brownell at(916)638-2765. <br /> Sincerely, <br /> DELTA PlVIRONMENTAL CONSULTANTS,INC. <br /> i <br /> Johmith FiED <br /> Manage .111? <br /> 6 q. 8/?0�� <br /> N <br /> James R Brownell * N0.50 <br /> California Registered Geologist No.5078 Ex <br /> tr 6 <br /> Enclosures <br /> 9�F CALIFOP�`P <br /> cc: Rob Donovan,Tesoro Petroleum Companies, Inc. <br /> Chuck Miller,USA Petroleum <br />