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EDMUND G. BROWN JP.
<br /> ' OOVENNON
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<br /> I�Water Boards ECe NOTELTi01,
<br /> - - - - - - -- - - - F Fi 0-4-2014
<br /> Central Valley Regional Water Quality Control Board
<br /> ENVIPR R E SERVICEce
<br /> ALYH
<br /> 31 January 2014
<br /> Stephen Donell
<br /> Industrial Drive Receivership Estate
<br /> 12121 Wilshire Blvd., #1120
<br /> Los Angeles, CA 90025
<br /> SITE ASSESSMENT REPORT COMMENTS, INDUSTRIAL DRIVE
<br /> RECEIVERSHIP ESTATE, 248 INDUSTRIAL DRIVE, STOCKTON, SAN JOAQUIN
<br /> COUNTY
<br /> Staff of the Central Valley Regional Water Quality Control Board (Regional Water Board) have
<br /> reviewed the 11 September 2013 Site Assessment Report (Report) for 248 Industrial Drive in
<br /> Stockton, San Joaquin County (Site), submitted on your behalf by Pinnacle Environmental Inc.
<br /> (PEI). The Report was submitted following completion of approved Site Assessment Work Plan
<br /> field investigations, which were conducted from 28 May through 7 July 2013. The Report was
<br /> requested by the Regional Water Board to further define the vertical and horizontal extent of soil
<br /> and groundwater impacts underlying the Site. Based on the data collected and presented in this
<br /> Report, the Industrial Drive Receivership Estate has requested Site closure.
<br /> Background
<br /> The vacant Site consists of an approximately five acre parcel of land in an industrial area that
<br /> containing an approximately 50,000-square foot (ft) single-level industrial warehouse structure,
<br /> a 1,500-ft2 single-level office structure, septic system with leach lines, truck scale, a railroad
<br /> spur, three vaults, and a tunnel and trench drain system of unknown past use inside the
<br /> warehouse. Most of the Site is covered with thick, reinforced concrete. Areas of concern
<br /> include two to four empty underground storage tank (UST) graves with stained soil, concrete
<br /> patches on the warehouse floor and outside at various Site locations, septic system with leach
<br /> lines, and stormwater drainage system. Previous investigations found various chemical
<br /> constituents of concern present in Site soil, soil vapor, and/or groundwater. These constituents
<br /> include 1,2-dichloropropane (1,2-DCP), benzene, toluene, ethylbenzenes, xylenes (BTEX), total
<br /> petroleum hydrocarbons (TPH), xylenes, ethylbenzenes, freon 11, chloroform, and acetone.
<br /> Historical Site uses include grain storage, fertilizer distribution and/or manufacturing, felt and
<br /> shingles roofing manufacturing, roofing underlayment and manufacturing, and metals recycling.
<br /> Potential chemical constituents of concern (COCs) associated with historical uses include
<br /> petroleum products, solvents, lubricants, pesticides, fumigants, ammonia, phosphorus, and
<br /> heavy metals. The last known tenant of the Site was NICA Metals recycling in 2008. In 2010,
<br /> PEI site visits noted numerous piles of miscellaneous metal and construction debris, and
<br /> various abandoned hazardous materials (primarily maintenance supplies), which required
<br /> disposal. CDCs found in Site soils, soil vapor, and groundwater correlate with the potential
<br /> CDCs associated with historical uses.
<br /> KARL E. LONGLEV SCD, P.E., CHAIR I PAMELA C. CREEDON P.E., BCEE, EXECUTIVE OFFICER
<br /> 11020 Sun Center Drive 5200,Rancho Cordova,CA 95570 1 www.waterboards.ca.gov/centralvalley
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