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Delta <br />A Environmental <br />Consultants, Inc. <br />Solving environment-related business problems worldwide <br />5910 Rice Creek Parkway • Suite 100 <br />St. Paul, MN 55126 USA <br />651.639.9449 1.800.477.7411 <br />651.639.9473 651.639.9497 Faxes <br />September 23, 2002 <br />Ms. Margaret Lagorio <br />Supervisor, Site Mitigation Unit IV / LOP <br />San Joaquin County Environmental Health Division <br />304 East Weber Street, 3rd Floor <br />Stockton, CA 95202 <br />Subject: Application for Soil Boring Permit <br />Limited Phase II Environmental Site Assessment <br />United Storage Site <br />2115 West Washington Street <br />Stockton, California <br />Delta Project No. A002-124-1 <br />Dear Ms. Lagorio: <br />Thank you for providing Delta Environmental Consultants, Inc. with the information necessary to complete the <br />required paperwork in order to obtain a soil boring permit for the above-referenced site. Enclosed is the <br />completed Unit IV-MFR form, the Licensed Contractors Declaration form, the well permit application form, and <br />the appropriate checks for the soil boring permit. <br />The purpose of conducting soil borings at the site is to evaluate subsurface conditions as part of a Limited <br />Phase II Environmental Site Assessment being conducted during the course of a property transfer. <br />According to available historical information, the site was vacant until 1938, at which time it was developed as a <br />bulk oil storage facility. Currently, the site is used for bulk molasses storage. A Phase ll summary document is <br />enclosed, which details the site history and development; site conditions, including number and contents of <br />tanks; and a summary of environmental conditions (Attachment A). <br />The proposed scope of work includes 10 direct push soil borings advanced at the subject property to a depth of <br />15 feet below ground surface or ground Vvater, whichever is most shallow. The proposed soil boring locations <br />are shown on Figure 1. <br />Soil samples will be collected continuously and field screened using a photoionization detector (PID), equipped <br />with 10.6 bulb. A discrete soil sample will be collected from the interval in each boring with the highest <br />observed PID reading and submitted for analysis at a fixed base laboratory. If elevated PID readings are not <br />observed in a particular soil boring, the soil sample from that boring will be collected from immediately above <br />the water table or at the boring's termination, whichever is most shallow. <br />The soil samples collected will be submitted for analysis of volatile organic compounds (VOCs) by <br />Environmental Protection Agency (EPA) method 8260, priority metals by SW846-6010, extractable fuel <br />A Mnober of: <br />XInogen <br />Environmental Alliance <br />E nestwayTerminalCMA002124\1-Stockton, CA\Docs\PermitCL.doc