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' Cary Keaten 0 - 5 - • 10 April 2007 ' d. The report does not describe any investigation of the possibility of survey coordinates for the lost wells, nor does it describe any photo interpretation in an ' attempt to locate the wells. Please describe all activities performed to locate the lost wells. t e. If homes will be constructed where the lost wells are located, how will the possibility of a homeowner discovering the well be prevented? f. Duncan Hickmott is listed as the responsible professional for the report but he did ' not sign the document. The name of the individual signing for Mr. Hickmott is not legible nor can a reader determine if the signatory is registered. Please clarify the responsible professional issue. Section 7835, 7835.1, of the Geologist and ' Geophysicist Act requires all geological and geophysical reports to be signed or stamped by a licensed person, either of which will indicate his or her responsibility for them. ' 2. In the 13 April 2006 Summary of Monitoring Well Repairs report, prepared by Engeo Inc., please address the following: ' a. The report states, "The wells were successfully located using a portable survey grade Global Positioning System (GPS) as stated in the above-referenced letter." ' It is unclear if the comment indicates survey coordinates were used to find the lost wells, or the discovered weds were surveyed with GPS equipment to establish their location. Please clarify the statement and provide the well coordinates. As with all other monitoring wells at the site, elevation shall be within 0.01 foot and horizontal coordinates shall be within one foot and shall be performed by a California licensed surveyor or engineer licensed to perform surveying. ' b. In the signature line, please include a title that identifies the licensed professional responsible for the adequacy of the field work and contents of the report. t 3. In the 13 February 2007 Monitoring Well Destruction report, prepared by Engeo, Inc., please address the following: a. Well MW-18 is part of the established groundwater monitoring network as ' described by WDRs Finding No. 62. The destruction of the well without first obtaining authorization from the Regional Water Board is a violation of the WDRs. ' The MRP requires: Prior to construction and/or sampling of any groundwater monitoring wells, the Discharger shall submit plans and specifications to the Board for review and approval. All wells identified in the groundwater monitoring well network shall be sampled and analyzed according to the schedule below. ' b. On all technical reports, please include a title that identifies the licensed professional responsible for the adequacy of the field work and contents of the report. As stated above, by 15 June 2007, please submit the Revised Master Workplan and the three stand-alone reports; by 29 June 2007 please submit the Groundwater Well Project Description Addendum. The City of Lathrop is currently violating WDRs Order No. R5-2006-0094 because it does not have the groundwater monitoring network required by the WDRs and therefore the replacement wells must be installed as soon as possible. W tSu MnwT mJauin\L&Wo_WW-MaR 6MGOUww 5 My 07.da