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ift September 20, 2004 SEP 2 3 ENVIRONMENT HEALTH FOR: San Joaquin County Environmental Health Department PERMIT,/SERVICES 304 East Weber Avenue, Third Floor Stockton, CA 95202 PROJECT: 23607 Hansen Road - Tracy, CA 95304 PA-04-475 (MS) Mr. Parminder Gillon- Applicant SUBJECT: Surface and Subsurface Contamination Report Addendum Reference is made to the Surface and Subsurface Contamination Report(SSCR) completed for the above-referenced project. Staff from EHD has requested an addendum concerning this property, which is attached. The date of the Surface and Subsurface Contamination Report was June 14, 2004. The actual date of report submittal to EHD was June 24, 2004. The date staff requested additional information regarding the contents of this report was September 9, 2004, and the postmark date on the envelope was September 17, 2004. The request for additional information addressing the items found insufficient,pertain to monitoring well(s) that were apparently installed on the subject property. The insufficient Item number on the SSCR Checklist is 3.2, which states: Description of all past on-site potential and/or known above and below ground sources of contamination identified at the project site. The examples listed include injection wells and unsealed wells,but do not make mention of monitoring wells. First, my SSCR included a document referenced as Rec-Check, produced by the firm Environmental Record Search, Inc. As noted on the first page, this document exceeds ASTM 1527/1528 - Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. This means that the SSCR I submitted suffices for a Phase I Environmental Site Assessment(ESA), which surpasses the requirements of the San Joaquin County Development Title for an SSCR. The County Development Title is specific about what environmental parameters are to be investigated for and do not encompass the usual, customary and reasonable standards of a Phase I ESA. The importance of the Rec-Check document cannot be overstated. This document surpasses a Phase I ESA, which surpasses an SSCR. The two attached EHD permits for these monitoring wells were signed by Alan Biederman and Doug Wilson. Neither of these gentlemen remembers what these monitoring wells were installed for and there apparently are no files relating to the reason for the installation of these wells. If the wells were still viable, there would have been (or should be) documentation at DWR and/or the Regional Board. This would have been picked up by the Rec-Check document. In addition, the correspondence claims that 19 monitoring wells were installed; however, only one well is illustrated on a site plan map associated with the EHD permits. Page 1 of 2 P. O. Box3794 ♦ Tm6ck,CA 95381 ♦ Office (209)668-1403 ♦ Fax(209) 668-2598