Laserfiche WebLink
CITY COUNCIL <br /> MARK CHANDLER, Mayor STEPHEN SCHWABAUER MIKEY HOTHI, CITY OF LODI City Manager <br /> Mayor Pro Tempore2015"Wine Region of the Year" JENNIFER CUSMIR <br /> SHAK KHAN City Clerk <br /> DOUG KUEHNE MUNICIPAL UTILITIES SERVICES JANICE D. MAGDICH <br /> ALAN NAKANISHI 1331 SOUTH HAM LANE City Attorney <br /> LODI, CALIFORNIA 95242 <br /> (209) 333-6740 / FAX (209) 333-6841 CHARLES E. SWIMLEY, JR. <br /> www.lodi.gov pwdept@lodi.gov Public Works Director <br /> December 29, 2021 <br /> NOTIFICATION —SOIL VAPOR SAMPLING <br /> CITY OF LODI, LODI SOUTHERN PLUME AREA <br /> Attn' Property Owner <br /> Vanderlans & Sons, Inc. <br /> 1320 S. Sacramento Street <br /> Lodi, CA 95240 <br /> SUBJECT- 1320 S. Sacramento Street <br /> This letter is to notify you that the City of Lodi (City) will be performing soil vapor sampling in <br /> the parking lot area just south of the City's industrial pump station from the dates of <br /> January 10 through January 18, 2022. <br /> Previous investigations in the Lodi Southern Plume (LSP) area, defined as the area <br /> bounded by Park Street to the north, Village and Maxwell Streets to the south, and by <br /> Stockton Street and School Street to the east and west, respectively (Figure 1), have <br /> indicated the presence of tetrachloroethene (PCE) and other volatile organic compounds <br /> like trichloroethene (TCE) in the groundwater that may be a result of historical and current <br /> industrial activities that have occurred along the Sacramento Street corridor. At present, <br /> the LSP area monitoring wells are monitored and sampled as part of the Central Valley <br /> Regional Water Quality Control Board (Water Board) Order No. R5-2018-0800 issued on <br /> January 11, 2018. <br /> Groundwater monitoring data collected from the LSP monitoring wells have indicated the <br /> presence of PCE in several LSP monitoring wells with increasing PCE concentrations <br /> observed in LSP well OS-2, which is located in the parking lot of the cul-de-sac on the <br /> southernmost tip of Sacramento Street in Lodi, California (Site — Figure 2). The Water <br /> Board directed the City to perform passive soil gas (PSG) sampling at the Site to evaluate <br /> whether a potential unknown source may be contributing to the increasing PCE <br /> concentrations in monitoring well OS-2. <br /> Civil Hydro Tech (CHT), on behalf of the City and as per the request of the Water Board, <br /> conducted PSG sampling in July and December 2020 and confirmatory PSG sampling in <br /> February 2021, beneath the cul-de-sac to define the lateral extent of PCE/TCE in the soil <br /> beneath the cul-de-sac and to identify the location of a potential unknown source/s of <br /> PCE/TCE that may be contributing to the increasing PCE concentrations in groundwater <br /> presencemunitating well OS2- The results of the PSG sampling indicated the of PCE and <br /> TCE in soil vapor beneath the cul-de-sac at concentrations ranging from 12.6 to 41,900 <br /> µg/m3 and <1.31 (reporting limit) to 2,540 µg/m3, respectively. Additionally, the highest <br />