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San Joaquin County DIRECTOR °"'" Environmental Health Den •� Donna Heran,REHS Department M ASSISTANT DIRECTOR r. 600 East Main Street Laurie Cotulla, REHS Stockton, California 95202-3029 PROGRAM COORDINATORS .'• Mike Huggins,REHS, RDi Margaret Lagorio,REHS cqC,fi6w4`P Website: www_sjgov.org/ehd Robert McClellon,REHS Phone: (209) 468-3420 .teff Carruesco,REHS,RDI Fax: (209)464-0138 Kasey Foley,REHS August 14, 2009 Arthur L Wyatt Jr. 6265 Crooked Stick Stockton CA 95219 Subject: Former Arco Am/Pm Site Code: 1216 4511 Pacific Avenue Stockton CA, 95207 The San Joaquin County Environmental Health Department (EHD) has received concurrence from the Central Valley Regional Water Quality Control Board on a determination that "no further action is required" for the above referenced contaminated underground storage tank site. The EHD has reviewed the Work Plan for Well Destruction (WP) dated August 10, 2009, submitted on your behalf by Advanced GeoEnvironmental, Inc (AGE), and site data for the above subject site and has the following comments. In the WP, AGE proposed to over-drill the well with significant groundwater impact, soil vapor well VW-1, and pressure grout the remaining wells. The EHD concurs with AGE's proposal to over-drill VW-1. However, some of the remaining wells are located in an area of either soil or ground water contamination which would require the well to be destroyed by method of over-drilling in accordance with the San Joaquin County Well Standards (Weil Standards). Any of the remaining wells that are located in an area of no soil or ground water contamination may be pressure grouted in accordance with the Well Standards. Upon review of site data, wells that should be over-drilled include MW1 though MW-9, MW-11 A and B, MW-12 A and B, MW-15, VW-1 through VW-4, EW-1 and EW-2; and wells that could be pressured grouted include, MW40, MW-13, M#'-14, MW-16 though MW-18. Please note that it is optional to over-drill all of the wells. To proceed with closure of this site, please submit to the EHD a well destruction permit application along with the required $405.00 permit and inspection fees for each parcel of land on which wells to be destroyed are located, and any applicable access agreements or encroachment permits. Please provide the EHD certification in writing that all record fee title owners have been notified of the intent to close this site pursuant to section 25297.15(a) of the Health and Safety Code. If you are the sole property owner, please provide a statement of that fact to the EHD (form enclosed). The above items should be submitted within 20 days of the date of this letter. Once the well destruction permit(s) have been issued, the work can be scheduled. Please notify the EHD at least 48 hours prior to performing the well destructions, so the inspections can be made.