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May 7, 2019 <br /> San Joaquin County Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205 <br /> Attention: EHD <br /> Well & Boring Permit Department <br /> Re: Limited Phase II Environmental Site Assessment <br /> 1624 Army Court <br /> Stockton, California <br /> Dear Sir/Madam, <br /> AECOM and their subcontractor, Gregg Drilling, LLC has our authorization to perform a limited <br /> Phase II Environmental Site Assessment(ESA)in the vicinity of a 10,000-gallon diesel underground <br /> storage tank (UST) at the property located at 1624 Army Court, Stockton, San Joaquin County, <br /> California. The work will include the following. <br /> • A geophysical investigation, consisting of a ground penetrating radar (GPR) and <br /> electromagnetic (EM) survey will be conducted in the location of the proposed borings for <br /> utility clearance; <br /> • Installation of up to six soil borings via Geoprobe®drilling technology in the vicinity of the <br /> 10,000-gallon UST up to a depth of approximately 12-14 feet below ground surface(bgs); <br /> and <br /> • The collection of soil samples and groundwater samples (if encountered) for laboratory <br /> analysis. <br /> Sincerely, <br /> DPIF2 C <br /> AA18 Army Court, LLC <br /> ( ;U:nfgg:5���Jason R. <br /> Vice President—Capital Deployment <br />