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STATE OF CALIFORNIA PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— - %'i <br /> CENTRAL VALLEY REGIONir if <br /> 3443 ROUTIER ROAD. SUITE A <br /> SACRAMENTO. CA 95827-3098 RECEIVED, + �' <br /> PHONE (916) 361-5600 <br /> FAX' 1916) 361-5686 <br /> JUN 3 0 1992 <br /> 26 June 1992 ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Steve M. Ferrara <br /> Santa Fe Pacific Pipeline Partners, L. P. <br /> 888 South Figueroa Street <br /> Los Angeles, CA 90017 <br /> COMMENTS ON THE SITE ASSESSMENT WORK PLAN FOR SANTA FE PACIFIC PIPELINE <br /> PARTNERS, L. P. , PORT OF STOCKTON FUEL TERMINAL, SAN JOAQUIN COUNTY, CASE NO. <br /> 3661 <br /> We have reviewed the site assessment work plan for the Santa Pacific Pipeline <br /> Partners (SFPP) bulk fuel facility at the Port of Stockton. The work plan <br /> proposes to destroy monitoring well (MW) 2, drill five soil borings, and <br /> convert two of the borings into monitoring wells. Our comments are presented <br /> below. <br /> Well destruction should comply with the requirements for destroying monitoring <br /> wells specified in the Department of Water Resources' California Well <br /> Standards (Bulletin 74-90), and any additional requirements the San Joaquin <br /> County Public Health Services may impose. <br /> Each soil boring is proposed to be drilled to 25 feet below ground surface <br /> (bgs) and sampled at three depths. Soil sample locations will be based on <br /> field screening using a photoionization detector (PID) and other field <br /> observations. Each sample will be tested for total petroleum hydrocarbons in <br /> the diesel and gasoline range (TPHD/G) , and benzene, toluene, ethylbenzene, <br /> and xylene (BTEX) . The response of a PID or other field instruments depends <br /> on relative constituent concentrations which can vary substantially over short <br /> distances and depths. Hence, field screening instruments provide only limited <br /> information which will be the basis of the soil samples. To get a better <br /> definition of the vertical extent of contamination, we suggest that soil <br /> samples be taken every five feet and at every stratigraphic change. The <br /> horizontal extent of contamination can be defined by moving radially away from <br /> the hot spot until the zero line of contamination is determined. However, <br /> identifying the zero line of contamination at your facility may not be <br /> feasible due to the confines of your property boundary. If this is the case, <br /> coordination with the Port of Stockton Technical Committee will be necessary. <br /> We suggest that remediation efforts be coordinated with the Technical <br /> Committee also. <br /> The proposed number of borings and monitoring wells seems inadequate. We <br /> recommend that a boring be drilled between M-1 and EB-3 for further definition <br /> of contamination in that area; a well be placed between M-3 and M-6 adjacent <br /> to the northwest property boundary to help identify if there is an upgradient <br />