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Gabriel Gonzalez [EH] <br /> From: William Little <wlittle@advgeoenv.com> <br /> Sent: Tuesday, December 09, 2014 4:27 PM <br /> To: Gabriel Gonzalez [EH] <br /> Subject: RE: 248 E Park St., Stockton (Canepa's Carwash) <br /> Mr. Gabriel Gonzalez: <br /> The City of Stockton is under an EPA permit, which requires all discharges to semi-annual supply a <br /> TTO (total toxicity organic) concentration. The EPA requires the drinking water method used for <br /> reporting. Thus 8260 is equal to 624 and 8270 is equal to 825. <br /> 1 do not believe any groundwater monitoring wells samples were analyzed for 625 or for TTO. <br /> However, some groundwater samples were analyzed for 8260 —full list; which allowed for evaluation <br /> of all chemical which might be collected by the DPE or be detected off-site. TCE and PCE are <br /> traditionally detected, release from the local dry cleaner. Maybe a talk with NCH will help your <br /> understand of the local issues. <br /> Well DPE-4 is north of the plume and not actively used for the groundwater extraction. <br /> Sincerely, <br /> William R. Little <br /> California Professional Geologist 7473 <br /> Oregon Registered Geologist G2254 <br /> Washington Licensed Geologist 2778 <br /> Advanced Geo Environmental Inc. www.advqeoenv.com <br /> Stockton • Los Angeles • San Francisco Bay Area • Spokane • Seattle • Portland • Reno • Dallas <br /> Phone: 800-511-9300 <br /> Fax: 888-445-8786 <br /> This email/fax message is for the sole use of the intended recipient(s)and may contain confidential and privileged information.Any unauthorized review, <br /> use, disclosure or distribution of this email/fax is prohibited. If you are not the intended recipient,please contact the sender by email/fax and destroy all <br /> paper and electronic copies of the original message. <br /> From: Gabriel Gonzalez [EH] [mailto•gagonzalez@sjcehd com] <br /> Sent: Monday, December 08, 2014 4:17 PM <br /> To: William Little <br /> Subject: 248 E Park St., Stockton (Canepa's Carwash) <br /> Hello Bill, <br /> If you may please provide some information regarding the following for the subject site, I would appreciate it: <br /> • Groundwater samples have been analyzed for over 70 analytes in groundwater monitoring/sampling events <br /> from 2013 and quarter 12014 events. I have seen this type of analysis for effluent water samples in remediation <br /> system sampling, but not so in groundwater sampling from MWs. Is this to fulfill a particular requirement? <br /> • DPE-4 doesn't seem to be mentioned in recent remediation reports. What is this well being used for? <br /> Thank you, <br /> Gahrial <br />