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#A1 � y <br /> RFSNA WATERWORK CORP. <br /> INDUSTRIES <br /> December 2, 1990 <br /> S3JIfl�SI�gIIR�d <br /> Joaquin Moulty <br /> RMH/fT�.#V/J •V 4�l <br /> M061AN3 <br /> � V VV� <br /> Department of Public Health Services Aft, ; <br /> Environmental Health Division <br /> P.O. Box 2009 A <br /> Stockton, CA 95201 <br /> Re: BJJ Company, Inc. , 2431 East Mariposa Road, Stockton <br /> As discussed during our meeting on November 27, 1990, the <br /> following is an addendum to the "Underground Fuel Tank <br /> Abandonment Contamination Assessment Report" dated July 30, 1990, <br /> for the above-referenced "site. In addition to the three soil <br /> borings proposed in the report, one groundwater monitoring well <br /> will also be installed in the regional downgradient direction of <br /> the tank system. The proposed location is shown on the attached <br /> figure. <br /> To assess the contribution of the existing underground tank to <br /> soil and groundwater contamination at the site, WaterWork <br /> proposes to drill, log, and sample one soil boring which will be <br /> completed as a groundwater monitoring well. <br /> Work will commence on the site within 30 days of receiving <br /> workplan approval. We anticipate it will take one to two days <br /> for soil boring and well installation and one day for groundwater <br /> well development and sampling. Drilling will be scheduled upon <br /> approval of the workplan. The County of San Joaquin will be <br /> notified at least 48 hours in advance of site work. <br /> One eight-inch soil boring will be drilled and completed as a two <br /> inch diameter groundwater monitoring well. All procedures and <br /> protocol for groundwater monitoring well construction will <br /> conform to the standards recommended by San Joaquin County and <br /> the Regional Water Quality Control Board (RWQCB) . <br /> The well will be completed to a depth of approximately 60 to 70 <br /> feet below grade. Well completion depth will be based on <br /> placement of the screened interval five feet above and fifteen <br /> feet below the static water table. However, if a stratum of five <br /> continuous feet of relatively impermeable material is encountered <br /> below the zone of saturation, the well will be terminated without <br /> 1710 MAIN STREET • ESCALON,CA 95320 • (209)838-3507 <br /> 2350-A WALSH AVENUE . SANTA CLARA,CA 95051 • (408)496-1249 <br />