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<br />Water Boards
<br />Central Valley Regional Water Quality Control Board
<br />30 April 2012
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<br />ENVIRONMENTAL HEALTH
<br />PERMIT/SERVICES
<br />Gurpal Sidhu et al
<br />5410 Staples Way
<br />Linden, CA 95236
<br />Paul Sidhu
<br />3032 E. Waterloo Avenue
<br />Stockton, CA 95205
<br />Karamject Johal
<br />10228 Hall Avenue
<br />Richmond, British Columbia V6X-3T9
<br />Parmdip Johal
<br />7391 Nevis Drive
<br />Richmond, British Columbia V7A-1J5
<br />Gurpal Sidhu et al
<br />1233 N. Central Avenue
<br />Kent, WA 98032
<br />Deputy Dhaliwal
<br />15420 SE 80th Street
<br />Newcastle, WA 98059
<br />DOCUMENT REVIEW, WATERLOO FOOD AND FUEL, 3032 E. WATERLOO ROAD, STOCKTON,
<br />SAN JOAQUIN COUNTY (RB CASE# 390609)
<br />I reviewed the Ground Water Monitoring Report — First Quarter 2012 (Report) received 24 April 2012 from
<br />Advanced GeoEnvironmental Inc. (AGE), the consultant for Deputy Dhaliwal. Groundwater monitoring
<br />occurred on 1 May 2012. Depth to groundwater varied from 45' below ground surface (bgs) to 50' bgs.
<br />Groundwater flow directed varied from the northwest (60'-80' bgs) to the northeast (100' bgs) to the southeast
<br />(135' bgs) to the southwest (160' bgs) and to the northeast (185' bgs). Groundwater gradient varied from
<br />0.0001 ft/ft to 0.002 ft/ft. Maximum groundwater concentrations were total petroleum hydrocarbons as gasoline
<br />(TPHg), 4,400 ug/L; benzene, 520 ug/L; toluene, 480 ug/L; ethylbenzene, 450 ug/L; xylenes, 330 ug/L; methyl
<br />tert butyl ether (MTBE), 1,200 ug/L; tertiary butyl alcohol, 2,400 ug/L; tert amyl methyl ether, 6.7 ug/L; and
<br />1,2-dichoroethane, 12 ug/L.
<br />The Report recommends continued limited groundwater monitoring, continued operation of the groundwater
<br />pump and treatment system (GWPTS), and installation of one additional groundwater extraction well along the
<br />western extent of the property. As previously stated by AGE during a meeting on 13 March 2012 the
<br />additional groundwater extraction well would optimize the GWPTS efficiency by addressing contamination in
<br />the 90' to 100' bgs sandy interval downgradient of offsite MW-11 (TPHg, 900 ug/L and MTBE, 830 ug/L).
<br />I concur to the Report recommendations. Please submit the Work Plan for the new extraction well by
<br />30 May 2012. You may contact me with questions either by phone at (916) 464-4615 or by e-mail at
<br />jbartonwaterboards.ca .00v.
<br />,4
<br />. - -
<br />,James L.L. Barton, P.G.
<br />"Engineering Geologist
<br />cc: Nuel Henderson, San Joaquin County Environmental Health Department, Stockton
<br />Clarence Chan, 3247 W. March Ln., Ste. 120, Stockton 95219
<br />William Little, Advanced GeoEnvironmental, Inc., 837 Shaw Rd., Stockton
<br />KARL E. LoNoLE), ScD. r.E., c,iin I PAMELA C. CREEDON P.C.. BCCC, EXECUTIvE
<br />11020 Sun Center Drive 9200, Rancho Cordova, CA 95670 I www waterboards.ca govicentralvaliey
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