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R <br /> � C k <br /> I:,� E°murvo G.a...JR. <br /> AUG 2 5 2016 fd aa.RR° <br /> CPLIF°Rnr• MV p°xMN iOR°Ri°VE2 <br /> Wo <br /> Water Boards <br /> cat rte° T <br /> Central Valley Regional Water Quality Controf Board <br /> 10 May 2016 <br /> Tim McCoy, Director of Public Works <br /> City of Lathrop <br /> Department of Public Works <br /> 390 Towne Center Drive <br /> Lathrop, California 95330 <br /> CONDITIONAL APPROVAL, GROUNDWATER MONITORING WELL CONDITION SURVEY <br /> REPORT AND DESTRUCTION PLAN, WELL ABANDONMENT WOR�C PLAN, <br /> CITY OF LATHROP, CONSOLIDATED TREATMENT FACILITY, SANT JOAQUIN COUNTY <br /> The City of Lathrop (City) owns and operates the Consolidated Treatment Facility (CTF) in <br /> San Joaquin County. The Lathrop CTF is regulated under Waste Discharge Requirements <br /> (WDRs) Order R5-2016-0028, which was adopted by the Central Valley Regional Water Quality <br /> Control Board (Central Valley Water Board) on 21 April 2016. Central Valley Water Board staff <br /> is in receipt of the following reports: <br /> 1. Groundwater Monitoring Well Condition Survey Report and Destruction Plan (Survey <br /> Report and Destruction Plan) dated 27 January 2016 submitted y the City in <br /> accordance with Provision H.1.c of Order R5-2015-0006. Order R5-2015-0006 was <br /> rescinded and is replaced by Order R5-2016-0028. <br /> 2. Work Plan for Well Abandonment (Work Plan) dated 2 May 2016 submitted by <br /> ENGEO, Inc. on behalf of River Islands Development LLC. <br /> Groundwater Monitoring Well Condition Survey Report and Destruction Plan <br /> The Survey Report and Destruction Plan presented the conditions of all monitoring wells <br /> identified in Finding 43 of the previous Order R5-2015-0006. Ten existing monitoring wells were <br /> recommended for abandonment. Four of the ten wells were identified i Monitoring and <br /> Reporting Program Order R5-2016-0028 as wells for water level monitoring or future <br /> compliance wells at planned recycled water Use Areas that have not received any wastewater <br /> to date. The monitoring wells proposed for abandonment are summarized in the table below. <br /> Well Function per <br /> Well ID Location R5-2016-0028 Reason for Abandonment <br /> Central Lathrop Water level monitoring, Damaged <br /> CLSP-2 Specific Plan Future compliance wells g <br /> CLSP 4 Central Lathrop Water level monitoring, CI se proximity to existing <br /> Specific Plan Future compliance well well MWM-19 <br /> Central Lathrop Water level monitoring, Damaged <br /> CLSP-10 Specific Plan Future compliance wells 9 <br /> KARL E. IANGLEY SCD, P.E..CNPIR I PAMELA C. CREEOON P.E.,BCEE,EXECUTIVE WFICER <br /> 11020$un Cenbr Orlve 8200,B..h.C°raava,CA 85870 I www.watar0°eras.ca.0°V/een Ivellay <br />