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Message Page 3 of 6 Robert McClellon,Program Coordinator REI-IS Environmental Health Department 600 E.Main Street Stockton,CA 95202 (209)468-0332 From:Young,Glenn[mailto:Glenn.Young@CalRecycle.ca.gov] Sent:Wednesday,October 19,2011 10:20 AM To:Robert McClellon[EH];Natalia Subbotnikova[EH] Cc:'Beth Abramson-Beck';Ambrose,Sabra Subject:FW:City of Lodi Former Landfill Site Visit 18 Oct 2011 Robert&Natalia—FYI—notes from yesterdays site visit. Do you have a email/phone contact for Steve(the City's Attorney)? I will forward his contact info to Steve Levine—so they can discuss the CIA program and LEA responsibilities for CIA sites. Glenn From:Young,Glenn Sent:Wednesday,October 19,20119:23 AM To:Ambrose,Sabra;'Beth Abramson-Beck';Peter Clark Cc:Walker,Scott;Mindermann,Wes;Levine,Steve Subject:City of Lodi Former Landfill Site Visit 18 Oct 2011 Here are notes from the site visit to the City of Lodi Landfill on 18 Oct 2011: • Met with the San Joaquin County LEA(Robert McClellon,Natalia Subbotnikova,Michael Nith),City Public Affairs and Counsel(Jeff Hood&Steve?)at the City of Lodi Former Landfill • LEA requested CIA staff assistance in review PCLU proposed for the City of Lodi Landfill(canoe&kayak park access point to Mokelumne River);see: http://www.lodi.gov/press releases/PR20110815 rive raccess.htm1;CIA staff reviewed site files and previous reports and recommends phase I&II investigation prior to approval of PCLU project • Performed a site walk around the 3.7-acre"peninsula"parcel owned by the City of Lodi(which is gated and fenced-see below aerial photos); • Several investigation reports have been performed for the site which includes borings,trenching and sampling&analysis; some gas testing(see attached geotechnical report prepared for developers in 1982 by Foundation Engineers);waste thickness ranges from 20-25 feet;significant concentrations of heavy metals(see below table);Kleinfelder waste volume estimate of 25-50 KCYs(does not include soil—multiply x 4 based on 1:4 waste to soil ratio—3.7 acres x 43,560 ft2/acre x 20 feet deep=120 KCYs) • Historical aerials reflect disposal activities east and west of the railroad track and also to the south(see attached.kmz google earth historical aerial overlays);site to the west of railroad tracks had an industrial land-use(Winery until 1989) • Homes adjacent to the site may have waste on property or are being impacted by LFG migration(based on historic aerial footprint);we will try to obtain any documentation of efforts to delineate and remove waste materials from developers, consultants or the City prior to construction of residences • Waste evident(concrete,asphalt,glass)on slope of railroad bridge abutment;waste appears to go from 3.7 acre site beneath railroad bridge to other side • Evidence of trespassing during visit(transient camping)/security issues(some illegal dumping—minor) • 3.7 Acre site owned by city appears to be secured,covered,graded,vegetated and well-maintained • Home adjacent to the site on the west side of railroad tracks appears to be constructed on area that may have had disposal/contamination from Winery/previous industrial operations(surface impoundment noted on historical aerial in the vicinity of the home) ® Potential for waste disposal footprint east of the 3.7 acre City Landfill along the bank of the Mokelumne River(backyards of 2-3 residences east of the landfill—see below 1937 historial aerial overlay). • No long-term gas monitoring network at the site(one-time gas monitoring event conducted in 1980s);Kleinfelder's report suggested exemption from SWAT program • Recommend a LFG monitoring network construction to 27 CCR 20925 standards based on current residential land-use and one-year of monthly gas monitoring to include quarterly gas sampling and analysis for fixed gases and VOCs,e.g.ASTM 1942 and T.O.-15(City used site for C&D until 1970s) • Recommend exploratory boring and trenching and sampling as part of investigation(see below suggested locations— exploratory borings/sampling/complete as gas monitoring or LFG observation wells—also see attached Google Earth Placemarks for suggested boring locations) • Recommend that Steve Levine talk to City of Lodi Counsel regarding CalRecycle regulations,enforcement,LEA responsibilities,etc.(relay CalRecycle experiences with Duarte,Benton Dump,Waring's Dump,Pacific Avenue,14th Avenue, etc.) Beth will develop and prepare the LFG Monitoring Network/Investigation Work Plan(to include summary of previous reports and investigation,e.g.Phase 1) • Sabra will coordinate the draft investigation work plan with the LEA,City and RWQCB/DTSC as necessary) • Sabra will work with Robert/Natalia to obtain Site Access based on final investigation exploration/LFG monitoring well locations • Sabra will work with LEA and City to obtain current Parcel Map/Residential Subdivision Maps/Parcel Map prior to Subdivision(showing industrial uses) • Ninyo&Moore will perform the field work/LFG monitoring well construction oversight;request Clean-up program support 10/21/2011