Sum or hom; Dt PARIMENI OF ENVIRONHINIM PROIICIION i ROUTING Sup TOE. - . . - - bishiiev i Panama City Northwest District Brandi Office i Tallahassee Northwest District Branch OlToce i Tama Dm rucr - omni-, oauuno cemm. mmuer Meboume cum: umm tacnsonvius I caanmanie Northeast i - Fon? soum - ui District Branch omm - - SOUTHEABT DISTRICT Pod St Lucie Southeast District Branch Ofhce I l] l] i Co nts: r$/eme am. Wm. a?fwagpt, 1 Gm fom imc, ZA, Lb-ek, 1 i From Tel; i gC, 10 Florida Department of I I Memorandum Environmental Protection Bret l.cRoux, Manager oI"I`anks and Waste (`leanup (`cntral District ()I`Iiee 'I`hrough: Mike Ashcy, ('hiel, Bureau oI`I'ctroleum Storage Systetns Iicrda Yilmaz, State (`leanup (`ontract Manager |?ro1n: V- Ixylc Specialist ll Petroleum ('Ieanup Section 'l`wo Date: liebruary I4, 2007 2 Subject: 'l`ransIer oI`Site to l)istrict ng'. IDN Imperial (las Station '|`hrcat Site Site Score: 45 l'er our conversation today, the above site is being translerred to the (`cntral District ()I`Iiec lor review and the development oI`a possible ('onsent ()rdct'. 'l`hc site does not have program eligibility, but has had assessment activities conducted over the past year totaling $203,00 t. Attached, please Iind documents summarizing the recent assessment activities (2006-2007) and a historical summary prepared when the site was managed under the I lazardous Waste (`Ieanup Section All other site documents are have been scanned into or have been sent to the Records and l)oeument Management (`enter lor scanning. II`you have any questions or require any additional documentation, please contact mc at (850) 245-8855 or via ctnail lit Ill. I'tt Ji I`Hrtlu?tl srt! rm yi Ir?tl Florida Department of Memorandum Environmental Protection Mike Ashey, ('hiel` I Bureau oI`l'etroleum Storage Systems 'l`hrough: Rebecca Marx, Manager Petroleum ('leanup Section 'l`wo Through: l?`erda Yilmaz, State (`leanup ('ontraet Manager l'etroleum ('leanup Section From: Kyle Kilga, Specialist l'ctroleum (`leanup Section 'I`wo l)ate: .|anuary IX, 2007 Subject: Summary ol"l`ask Assignments Imperial (las Station 44I-Ocala) Site l?`aeility ll) Non-Program - lmminent 'l`hreat Site - Site Score: 45 I Executed ('onduel baseline sampling ol`all IS wells aml evaluate the abandoned treatment system and compound. Analytical results assisted in lmmincnt 'l`hreat determination. l3I? $282,458.24 Executed 6/28/06 l)ismantle and remove treatment system aml compound with salvageable equipment to warehouse and disposal ol`drums ol` acids, equipment, lencing. piping etc. (`onduct direct push aetivities to delineate soil contamination and collect (IW grab samples to determine well locations. Install I2 shallow (I5- 20 intermediate (35-50`) aml 20 deep (55-70`) wells, and 2 soil boring. Sample all newly installed wells. Since this was a FY06 task assigmnent, additional lield activities have been suspended and the eontaetor will submit an incomplete by January 30, 2007. Proposed Activities Additional assessment is need to delineate the groundwater plume to the west ol`the site. contractor proposes to install ll) additional monitoring wells (5-shallow, (v-intermediate, 0-deep, I- 75- I- to determine the horizontal and vertical extent ol`the groundwater plume aml due to the variability on the site lithology over short distances, a geophysical survey ol`the subsurlitee is being discussed using induced polarization/resistivity to map and identity voids, l`raetnres, clay cavities and other subsurlitee anomalies. An estimated cost to completeassessment ol`this site ranges l`rom I 25,000 to $200,000. l)ue to the depth and lateral extent ol`the (IW plume aml the dil`licult lithology, remediation at this site will be extremely dil`lieult aml expensive. "Mt 't lit ut, l`t'tIt ull HH yi It wl [lL||ot*I Florida Department of Memorandum Pl'0tEURCtl0l1 Mike Ashey, (`hiel` Bureau ot` Petroleum Storage Systems 'l`hrough: Marx, linvironmental Manager Petroleum (`leanup Seetion 'I`wo 'l`hrough: |?`erda Yilmaz, State (`Ieanup ('ontract Manager Petroleum (`Ieanup Section 'I`wo - From: Kyle Kilga, linvironmental Specialist Petroleum ('Ieanup Seetion l)ate: I, 2006 Subject: Anonymous l.etler Received Regarding Imperial (las Station 4-ll) Site ()Id US -4-4l NW 35"` St. ()eaIa, Marion II) Site Score: 45 Non-Program lmminent 'l`hreat Site An unsigned letter dated ()ctober IS, 2006 with a (iainesville postmark was received by the Bureau on ()ctober 20, 2006. 'I`he letter the Imperial (las Station (aka ()Id 44 I) site. 'I`he writer appears to be disgruntled that the site was placed in a State clean up program, and that the new owner ol`thc site (purchased Iiebruary 2006 liar hack taxes) has reaped a windlinll. As stated above. we cannot determine who wrote the letter. but it may possibly be I`rom Mr. Ron Spencer. Mr. Spencer has had several phone conversations with .|oIm Wright, Mr. Spencer seemed to be interested in purchasing the property and wanted intormation regarding the contamination. Research determined that the site was translerred Irom the Bureau ol`Waste (`Ieanup to in April lt)97 (along with 3 additional sites). Somehow this site thru a crack and was never addressed. 'l`he site has no program eligibility. In September 2005, .le|T |'riddle was requested to review the site to see it` it might be determined to be an imminent 'I`hreat. A well survey conducted ()ctober 2005 Iound no petroleum contamination in l0 wells within ld mile o[`the site. Since monitoring results Ii?om the site were nearly I0 years old, it was determined that the Bureau should sample the on-site wells. In HI, I`lui l'unh-rlrm ri-: yi purn-r In 20t)5, Mikc Ashcy, (`hicl, approvcd rcconuncndation madc hy John Wright to conduct a round ol`groundwatcr sampling by a Statc (`lcanup contractor I 13A $1 Analytical rcsults indicatcd pctrolcum contamination was on sitc. llaving sitc lic within loot protcction zonc o1`a 1'uhlic Supply justilicd sitc lor lnunincnt 'l`hrcat Status which was approvcd in May 2006. '|`ask 1313 was issucd in .lunc 2006 to sitc including soil horings and monitoring installation. '1`o datc, sitc is hcing cvaluatcd to what additional is undcr this task which amounts to data indicatcs that contamination and groundwatcr llow is to and is locatcd to North ol`thc sitc. A clustcr ot` monitoring 16-31; 36-51; and 55-70), arc locatcd approximatcly 25 south ol`thc PSW, and all zoncs indicatc that groundwatcr is clcan. Soil lrom vadosc zonc (0 to 20 hclow ground surl`acc) cxhibitcd rcadings as high as 816 ppm. 18815 ZN 1. llow do wc this anonymous Should wc contact Mr. and ask il` hc is awarc ol`thc 2. Mr. may havc dccidcd against purcI1ascol`thc sincc hc did his homcwork and lbund that sitc was not cligihlc lor a clcanup program, thus not wanting clcanup liahility. 'I`hc owncr that purchascd land cithcr did not usc duc and conduct an or didn`t carc and just camc up lucky BPSS hcgan work at sitc using statc l`unding 3. '|`his sitc docs not havc program cligihility othcr than Burcau duc to Immincnt '|`hrcat status. Sincc wc havc that sitc now has an owncr, docs owncr havc liability to pay lor clcanup? Should wc pursuc owncr? Iivcn i|`thc sitc was madc cligihlc lor than $6,000 would rcmain t`rom $300,000 4. Sincc this sitc was hcing hy Statc sincc as carly as 1983, would it havc rcasonahlc that lormcr owncr did not think hc to apply lor program at timc, il`thc Statc was alrcady clcaning up sitc at no to him'? 5. ()ncc is should wc a monitoring plan and not into phasc il`thc immincnt thrcat can hc ahatcd. At that point should sitc hc to District'! OLD 441 GASOLINE SITE Old US 441 and NW 35th St. Near Ocala, Florida County: Marion District: Site Lead: Bureau of Waste Cleanup Site Description and Hisygy The Old 441 site is located in a mixed commercial and residential area just north of the City of Ocala at the intersection of Old Highway 441 and NW 35th Street. The site consists of an inactive gasoline station (imperial Gas, later Vitrified Clay Pipe). ln October 1983, the Marion County Health Department (MCHD) reported to FDER several areas of potable water contaminated with gasoline. From February to July 1984, the FDER and MCHD conducted a well inventory and sampling program to characterize the contaminated sites. The Old 441 site was identified as an area with gasoline contamination and an unidentified contaminant source. Groundwater contamination was detected in Floridan Aquifer samples obtained from residential wells adjacent to the site. The original underground petroleum storage tanks and associated piping at the gas station was suspected to be the source of contaminaticm. Threat The primary threat is to private wells in the area which use the Floridan Aquifer as a source of drinking water. The unconfined Floridan Aquifer in Marion County is extremely susceptible to infiltration of contaminants from the surface. Several private wells adjacent to the site have been contaminated by gasoline from leaking storage tanks. Contaminants include benzene, toluene, and xylene Residents have been required to use bottled water or other potable water sources. @ps>rm. ?trat?gy..aad- Status .lAn@. ..195271 During October 1985, the Bureau's assessment contractor conducted a geophysical survey at the site to locate abandoned tanks in the vicinity of confirmed ground water contamination. A soil gas survey was conducted in December 1985 to define the extent of contamination at the site. The source was tentatively identified as the above ground storage tanks and associated piping. The tanks and piping were removed in February 1986. Monitoring wells were installed in April 1986, and several wells were geophysically logged and sampled to further define the zone of contamination. A draft Contamination Assessment report was submitted to FDER in February 1987, followed by a Remedial Action Plan in March. ln July 1988, FDER tasked a State contractor, Ecology Environment fE&El, to obtain additional soil samples to the necessity of soil remediation, and to re-sample on--site wells. The data was submitted in September 1988 and inrlicated that only groundwater requires remediation. Old 441 Gasoline Page: 2 Revision: 05/09/97 Remedial Design was initiated under FDER's Petroleum Cleanup Program in March 1989. Field work, including recovery well installation and pump tests, was conducted in July 1989. Remedial design was completed in January 1990. Construction of the groundwater treatment and disposal system began in May 1990 but was halted when ground water analysis from the newly installed on--site injection well indicated contamination. Additional monitoring wells were installed in July 1990. Data from the new monitoring wells indicated that groundwater contamination extends further west and off site than originally estimated. A Supplemental Groundwater Contamination Assessment Work Plan was submitted in February 1991 to address delineation of the westerly extent of the groundwater contaminant plume. was tasked to perform the work in July. Field work began in August 1991 and included the installation of one deep and three additional Upper Floridan monitoring wells west of the site, a new downgradient injection well to the south and an upgradient monitoring well to the north. Sample results confirmed high levels of BTEX contamination in the Upper Floridan approximately 200 feet downgradient (west) of the original source. Based on the August 1991 fieldwork, the original remedial design was revised to accommodate the use of two additional groundwater recovery wells further west of the site. The actual western extent of groundwater contamination remained uncertain until legal steps were taken to obtain site access for additional monitoring well(s) installation. Construction of an interim groundwater recovery and treatment system to prevent further contaminant migration was completed in July 1992. Operation and maintenance of the system began in August 1992. A chemical pretreatment system was added in February 1993 to prevent iron deposits from fouling the groundwater treatment system. Three additional monitoring wells were installed in March 1993 to delineate the full extent of groundwater contamination. Based on this new information, a design addendum was completed. A fourth groundwater recovery well was hooked up to the existing treatment system in December 1993. As of January 1997, approximately 37.9 million gallons of contaminated groundwater have been captured and treated by the system. A re?evaIuation of system design was performed in the spring of 1995 so that methods of optimizing site cleanup could be implemented. As a result, groundwater pumping rates were increased, and a five (5) foot section was added to the air stripping tower to accomodate the higher flow rates. An pretreatment system is currently being tested at the site to determine its effectiveness in metals and solids removal for more efficient operation and maintenance of the groundwater treatment system. Other alternatives are also being reviewed to solve the iron fouling problem that is plaguing the treatment system. In February 1997, 2 private potable water wells adjacent to the site were reported to have gone dry. In March 1997, submitted a letter report to FDEP indicating that the treatment system was not the cause of the private wells going dry. Marion County Health Department was notified to advise the residents to have their water wells and pumps inspected by a pump repair service. Schedule Site cleanup is underway and is anticipated to be completed in early 2001.