FIELD DOCUMENTS_FILE 2 - Laserfiche WebLink

Home Browse Search

' .+ San Joaquin County ' oP "' Environmental Health Department ,, DIRECTOR. '—,C�''oG Donna Heran,REHS 1866 East Hazelton Avenue Stockton, California 95205-6232 PROGRAM COORDINATORS Robert McClellon, REHS ' Jeff Carruesco,REHS,RDI Kasey Foley, REHS cq��F o R��P Website: www.S gov.org/ehct Linda Turk tte,REHS Phone: (209)468-3420 Rodney Estrada,REHS Fax: (209) 464-0138 T Adrienne Ellsaesser,REHS June 27,:2013 Mr. Wesley Parkinson Parkinson's 1-5 ARCO Service Station 3250 West Hammer Lane Stockton, California 95209 a . Subject: Parkinson's 1-5 ARCO.Service Station 3250 West Hammer Lane Stockton, California 95209 Dear Mr. Parkinson: The San Joaquin County Environmental Health Department (EHD) has received and reviewed Work Plan for Well Destruction (work plan), dated 21 June 2013, prepared by your consulting firm, Stratus Environmental, Inc. (Stratus), on your behalf for the above-referenced site. The EHD had directed by letter dated 30 May 2013, the submittal of a scope of work proposal that detailed the condition and construction of the wells and the methods and materials to be used to destroy the wells. In the work plan, Stratus proposes to drill out monitoring wells MWA through MW-5 and MW-7 usingeight-inch diameter augers, and nested injection wells IW-1A/B through IW-4 A/B using 9 9 , 1 9 9 either ten- or twelve-inch diameter augers (to be determined in the field). Stratus proposes to seal the resulting boreholes to approximately six inches below surface grade (bsg) with neat cement or a cement grout mixture consisting of no more than two parts by weight sand and one part by weight cement in seven gallons of water using a tremie pipe. Stratus proposes to destroy MW-6,,constructed with a conductor casing, by: • Drilling out the well material inside and below the conductor casing to total depth of 64 feet bsg using eight-inch augers; • Excavating the area around the conductor casing to approximately three feet bsg-and approximately.27 inches in diameter before cutting off the steel conductor casing and surrounding cement seal approximately six inches above_ the base of the excavation; and • Filling the borehole from total depth to at least one foot above the base of the excavation with neat cement/cement grout.