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i AUK <br /> I <br /> San Joaquin County <br /> 1I Environmental Health Department DIRECTOR <br /> 1868 East Hazelton Avenue Donna Heron, REHS <br /> 0: III { Stockton , California 95205-6232 PROGRAM COORDINATORS <br /> Ij Robert McClellan, REFS <br /> y Jeff Carruesco, REFS, RDI <br /> Cq�IFo.R jd�P Website: wwW.s%gov. org/ehd Linda Tui katte,EHS EHS <br /> Phone : (209) 468-3420 <br /> Pax: (209) 464-0138 <br /> November 2 , 2012 <br /> Mr. Dante John Nomellini <br /> Nomellini Construction <br /> Post Office Box 1461 <br /> Stockton , California 95201 <br /> Subject: Nomellini Construction Company <br /> 1045 West Charter Way <br /> Stockton , California 95206 <br /> Dear Mr NomeHrni : <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Remedf :+7100 �el)ort — First Quarter 2012 (report) ; dated 05 October 2012, prepared by your <br /> consulting firs , Advanced GeoEnvironmental , Inc. (AGE) , on your behalf for the above- <br /> referenced site In the report, AGE presented data collected from operating the dual-phase <br /> extraction ( DPE ) remediation system between 01 January and 27 February 2012 that included <br /> analytical results for groundwater and soil vapor samples collected during this period. AGE <br /> noted that the DPE system was "pulsed off' for the month of March 2012 "to stay within <br /> Underground Storage Tank Cleanup Fund (USTCF) annual budget constraints." <br /> AGE estimated that approximately 0. 791 pounds of total petroleum hydrocarbon as gasoline <br /> (TPH-g) and 0. 003 pounds of benzene were removed from groundwater between 03 January <br /> and 27 February 2012; and approximately 101 .4 pounds of TPH-g and 4. 5 pounds of benzene <br /> were removed from soil gas between 09 January and 14 February 2012. AGE noted that <br /> petroleum hydrocarbon concentrations continue to decline at this site . <br /> AGE has recommended that the DPE system operate °on a month-on, month-off basis' going <br /> forth, and that the reports pertaining to the remediation system be submitted semi-annually <br /> instead of quarterly to reduce costs . <br /> The EHD concurs with the recommendations proposed by AGE to operate the DPE system by <br /> alternating the system on and off each month . Continue this procedure for a period of one year. <br /> At that time, the effects of operating the system every other month should be evaluated. <br /> The EHD also approves the submittal of the remediation report semi-annually instead of <br /> quarterly; however, if conditions in the field change such that the schedule for operating the <br /> DRE system is modified, then submit a report to the EHD immediately notifying this agency of <br /> the changes. Also; the EHD's approval of Submitting remediation reports to this agency semi- <br />