through the operations at our marrero , louisiana facility , we produce a vacuum gas oil ( vgo ) product from used oil re-refining which is then sold via barge to crude refineries to be utilized as an intermediate feedstock in the refining process , as well as to the marine fuels market . . through the operations at our columbus , ohio facility we produce a base oil finished product which is then sold via truck or rail car to end users for blending , packaging and marketing of lubricants . refining and marketing - the refining and marketing segment generates revenues relating to the sales of finished products . the refining and marketing segment gathers hydrocarbon streams in the form of petroleum distillates , transmix and other chemical products that have become off-specification during the transportation or refining process . these feedstock streams are purchased from pipeline operators , refineries , chemical processing facilities and third-party providers , and then 50 processed at a third-party facility under our direction . the end products are typically three distillate petroleum streams ( gasoline blendstock , pygas and fuel oil cutterstock ) , which are sold to major oil companies or to large petroleum trading and blending companies . the end products are delivered by barge and truck to customers . recovery - the recovery segment is a generator solutions company for the proper recovery and management of hydrocarbon streams . we own and operate a fleet of trucks and other vehicles used for shipping and handling equipment and scrap materials . our revenues are affected by changes in various commodity prices including crude oil , natural gas , # 6 oil and metals . cost of revenues black oil - cost of revenues for our black oil segment are comprised primarily of feedstock purchases from a network of providers . other cost of revenues include processing costs , transportation costs , purchasing and receiving costs , analytical assessments , brokerage fees and commissions , and surveying and storage costs . refining and marketing - the refining and marketing segment incurs cost of revenues relating to the purchase of feedstock , purchasing and receiving costs , and inspection and processing of the feedstock into gasoline blendstock , pygas and fuel oil cutter by a third party . cost of revenues also includes broker 's fees , inspection and transportation costs . recovery - the recovery segment incurs cost of revenues relating to the purchase of hydrocarbon products , purchasing and receiving costs , and inspection . cost of revenues also includes broker 's fees , inspection and transportation costs . our cost of revenues are affected by changes in various commodity indices , including crude oil , natural gas , # 6 oil and metals . for example , if the price for crude oil increases , the cost of solvent additives used in the production of blended oil products , and fuel cost for transportation cost from third party providers will generally increase . similarly , if the price of crude oil falls , these costs may also decline . general and administrative expenses our general and administrative expenses consist primarily of salaries and other employee-related benefits for executive , administrative , legal , financial and information technology personnel , as well as outsourced and professional services , rent , utilities , and related expenses at our headquarters , as well as certain taxes . depreciation and amortization expenses our depreciation and amortization expenses are primarily related to the fixed assets and intangible assets acquired in connection with the vertex holdings , l.p. ( formerly vertex energy , l.p. ) , a texas limited partnership ( “ holdings ” ) , e-source holdings , llc ( “ e-source ” ) , omega refining , llc 's ( “ omega refining ” ) and warren ohio holdings co. , llc , f/k/a heartland group holdings , llc ( “ heartland ” ) , acadiana , nickco , ygriega and ses acquisitions . 51 results of operations for the three months ended december 31 , 2018 compared to the three months ended december 31 , 2017 set forth below are our results of operations for the three months ended december 31 , 2018 , as compared to the same period in 2017 . replace_table_token_3_th 52 each of our segments ' gross profit ( loss ) during the three months ended december 31 , 2018 and 2017 were as follows : replace_table_token_4_th revenues increased 1 % for the fourth quarter of 2018 , compared to the same period in 2017 , due primarily to higher commodity prices . total volume decreased 24 % and gross profit decreased 38 % for the three months ended december 31 , 2018 compared to same period in 2017 . additionally , our per barrel margin decreased 19 % relative to the three months ended december 31 , 2017 . the majority of this decrease was the result of the sharp drop in commodity prices during the fourth quarter of 2018 which resulted in compressed spreads during this period . notwithstanding the above , and the increase in cost of revenues for the fourth quarter of 2018 , which were a result of rising commodity prices during the first nine months of 2018 , versus the fourth quarter of 2017 , we believe that due to the combination of our fee structure change along with our increased third party supply we were able to make progress in lowering our cost of feedstock during the fourth quarter . this process takes time to implement and we anticipate seeing improvements to our margins during this first quarter of 2019 related to these changes . our black oil segment 's volume decreased approximately 8 % during the three months ended december 31 , 2018 compared to the same period in 2017 . story_separator_special_tag our revenues and cost of revenues are significantly impacted by fluctuations in commodity prices ; decreases in commodity prices typically result in decreases in revenue and cost of revenues . our gross profit is to a large extent a function of the market discount we are able to obtain in purchasing feedstock , as well as how efficiently management conducts operations . set forth below , we have disclosed a quarter-by-quarter summary of our statements of operations and statements of operations by segment information for the quarters ended december 31 , september 30 , june 30 , and march 31 , 2018 and 2017 , respectively . replace_table_token_7_th 59 replace_table_token_8_th the below graph charts our total quarterly revenue over time from march 31 , 2017 to december 31 , 2018 : story_separator_special_tag t > we had total liabilities of $ 33,171,401 as of december 31 , 2018 , including current liabilities of $ 16,995,611 and long-term liabilities of $ 16,175,790 , which included $ 14,402,179 of long-term debt representing the term loan with encina ( discussed below ) , and $ 1,481,692 of derivative liability related to warrants granted in connection with our series b and b1 preferred stock . we had working capital of $ 6,547,301 as of december 31 , 2018 , compared to working capital of $ 3,523,548 as of december 31 , 2017 . the increase in working capital is mainly due to the increase in our current assets in our operations . our future operating cash flows will vary based on a number of factors , many of which are beyond our control , including commodity prices , the cost of recovered oil , and the ability to turn our inventory . other factors that have affected and are expected to continue to affect earnings and cash flow are transportation , processing , and storage costs . over the long term , our operating cash flows will also be impacted by our ability to effectively manage our administrative and operating costs . additionally , we may incur future capital expenditures related to new refining facilities . the company financed insurance premiums through various financial institutions bearing interest rates from 4.00 % to 4.52 % . all such premium finance agreements have maturities of less than one year and have a balance of $ 999,152 at december 31 , 2018 . on march 1 , 2018 , the company obtained one capital lease . payments are $ 908 per month for the three years and the amount of the capital lease obligation was $ 22,390 at december 31 , 2018 . on may 29 , 2018 , the company obtained one capital lease . payments are $ 26,305 per quarter for four years and the amount of the capital lease obligation was $ 349,822 at december 31 , 2018 . credit and guaranty agreement and revolving credit facility with encina business credit , llc effective february 1 , 2017 , we , vertex operating , and substantially all of our other operating subsidiaries , other than e-source , entered into a credit agreement ( the “ ebc credit agreemen t ” ) with encina business credit , llc as agent ( the “ agent ” or “ ebc ” ) and encina business credit spv , llc and crowdout capital llc as lenders thereunder ( the “ ebc lenders ” ) . pursuant to the ebc credit agreement , and the terms thereof , the ebc lenders agreed to loan us up to $ 20 million , provided that the amount outstanding under the ebc credit agreement at any time can not exceed 50 % of the value of the operating plant facilities and related machinery and equipment owned by us ( not including e-source ) . 61 amounts borrowed under the ebc credit agreement bear interest at 12 % , 13 % or 14 % per annum , based on the ratio of ( a ) ( i ) consolidated ebitda for such applicable period minus ( ii ) capital expenditures made during such period , minus ( iii ) the aggregate amount of income taxes paid in cash during such period ( but not less than zero ) to ( b ) the sum of ( i ) debt service charges plus ( ii ) the aggregate amount of all dividend or other distributions paid on capital stock in cash for the most recently completed 12 month period ( which ratio falls into one of the three following tiers : less than 1 to 1 ; from 1 to 1 to less than 1.45 to 1 ; or equal to or greater than 1.45 to 1 , which together with the value below , determines which interest rate is applicable ) and average availability under the revolving credit agreement ( defined below ) ( which falls into two tiers : less than $ 2.5 million and greater than or equal to $ 2.5 million , which together with the calculation above , determines which interest rate is applicable ) , as described in greater detail in the ebc credit agreement ( increasing by 2 % per annum upon the occurrence of an event of default ) . interest on amounts borrowed under the ebc credit agreement is payable by us in arrears , on the first business day of each month , beginning on the first business day of the first full month following the closing , together with required $ 75,000 monthly principal repayments . we also have the right to make voluntary repayments of the amount owed under the ebc credit agreement in amounts equal to or greater than $ 100,000 , from time to time . the interest rate is 12 % at december 31 , 2018 . the ebc credit agreement terminates on february 1 , 2020 , on which date we are required to repay the outstanding balance owed thereunder and any accrued and unpaid interest thereon . the

liquidity and capital resources the success of our current business operations has become more dependent on repairs , and maintenance to our facilities and our ability to make routine capital expenditures . we also must maintain relationships with feedstock suppliers and end product customers , and operate with efficient management of overhead costs . through these relationships , we have historically been able to achieve volume discounts in the procurement of our feedstock , thereby increasing the margins of our segments ' operations . the resulting operating cash flow is crucial to the viability and growth of our existing business lines . we had total assets of $ 84,160,408 as of december 31 , 2018 compared to $ 84,305,474 at december 31 , 2017 . this decrease was mainly due to increases in accumulated depreciation as a result of our depreciable assets being one year . total current assets as of december 31 , 2018 of $ 23,542,912 include cash and cash equivalents of $ 1,349,831 , current restricted cash of $ 1,500,000 , described below , accounts receivable , net , of $ 9,027,990 , federal income tax receivable of $ 137,212 , inventory of $ 8,091,397 , derivative commodity asset of $ 695,941 in connection with our commodity derivative instruments , and prepaid expenses of $ 2,740,541 .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```liquidity and capital resources the success of our current business operations has become more dependent on repairs , and maintenance to our facilities and our ability to make routine capital expenditures . we also must maintain relationships with feedstock suppliers and end product customers , and operate with efficient management of overhead costs . through these relationships , we have historically been able to achieve volume discounts in the procurement of our feedstock , thereby increasing the margins of our segments ' operations . the resulting operating cash flow is crucial to the viability and growth of our existing business lines . we had total assets of $ 84,160,408 as of december 31 , 2018 compared to $ 84,305,474 at december 31 , 2017 . this decrease was mainly due to increases in accumulated depreciation as a result of our depreciable assets being one year . total current assets as of december 31 , 2018 of $ 23,542,912 include cash and cash equivalents of $ 1,349,831 , current restricted cash of $ 1,500,000 , described below , accounts receivable , net , of $ 9,027,990 , federal income tax receivable of $ 137,212 , inventory of $ 8,091,397 , derivative commodity asset of $ 695,941 in connection with our commodity derivative instruments , and prepaid expenses of $ 2,740,541 .
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 Suspicious Activity Report : through the operations at our marrero , louisiana facility , we produce a vacuum gas oil ( vgo ) product from used oil re-refining which is then sold via barge to crude refineries to be utilized as an intermediate feedstock in the refining process , as well as to the marine fuels market . . through the operations at our columbus , ohio facility we produce a base oil finished product which is then sold via truck or rail car to end users for blending , packaging and marketing of lubricants . refining and marketing - the refining and marketing segment generates revenues relating to the sales of finished products . the refining and marketing segment gathers hydrocarbon streams in the form of petroleum distillates , transmix and other chemical products that have become off-specification during the transportation or refining process . these feedstock streams are purchased from pipeline operators , refineries , chemical processing facilities and third-party providers , and then 50 processed at a third-party facility under our direction . the end products are typically three distillate petroleum streams ( gasoline blendstock , pygas and fuel oil cutterstock ) , which are sold to major oil companies or to large petroleum trading and blending companies . the end products are delivered by barge and truck to customers . recovery - the recovery segment is a generator solutions company for the proper recovery and management of hydrocarbon streams . we own and operate a fleet of trucks and other vehicles used for shipping and handling equipment and scrap materials . our revenues are affected by changes in various commodity prices including crude oil , natural gas , # 6 oil and metals . cost of revenues black oil - cost of revenues for our black oil segment are comprised primarily of feedstock purchases from a network of providers . other cost of revenues include processing costs , transportation costs , purchasing and receiving costs , analytical assessments , brokerage fees and commissions , and surveying and storage costs . refining and marketing - the refining and marketing segment incurs cost of revenues relating to the purchase of feedstock , purchasing and receiving costs , and inspection and processing of the feedstock into gasoline blendstock , pygas and fuel oil cutter by a third party . cost of revenues also includes broker 's fees , inspection and transportation costs . recovery - the recovery segment incurs cost of revenues relating to the purchase of hydrocarbon products , purchasing and receiving costs , and inspection . cost of revenues also includes broker 's fees , inspection and transportation costs . our cost of revenues are affected by changes in various commodity indices , including crude oil , natural gas , # 6 oil and metals . for example , if the price for crude oil increases , the cost of solvent additives used in the production of blended oil products , and fuel cost for transportation cost from third party providers will generally increase . similarly , if the price of crude oil falls , these costs may also decline . general and administrative expenses our general and administrative expenses consist primarily of salaries and other employee-related benefits for executive , administrative , legal , financial and information technology personnel , as well as outsourced and professional services , rent , utilities , and related expenses at our headquarters , as well as certain taxes . depreciation and amortization expenses our depreciation and amortization expenses are primarily related to the fixed assets and intangible assets acquired in connection with the vertex holdings , l.p. ( formerly vertex energy , l.p. ) , a texas limited partnership ( “ holdings ” ) , e-source holdings , llc ( “ e-source ” ) , omega refining , llc 's ( “ omega refining ” ) and warren ohio holdings co. , llc , f/k/a heartland group holdings , llc ( “ heartland ” ) , acadiana , nickco , ygriega and ses acquisitions . 51 results of operations for the three months ended december 31 , 2018 compared to the three months ended december 31 , 2017 set forth below are our results of operations for the three months ended december 31 , 2018 , as compared to the same period in 2017 . replace_table_token_3_th 52 each of our segments ' gross profit ( loss ) during the three months ended december 31 , 2018 and 2017 were as follows : replace_table_token_4_th revenues increased 1 % for the fourth quarter of 2018 , compared to the same period in 2017 , due primarily to higher commodity prices . total volume decreased 24 % and gross profit decreased 38 % for the three months ended december 31 , 2018 compared to same period in 2017 . additionally , our per barrel margin decreased 19 % relative to the three months ended december 31 , 2017 . the majority of this decrease was the result of the sharp drop in commodity prices during the fourth quarter of 2018 which resulted in compressed spreads during this period . notwithstanding the above , and the increase in cost of revenues for the fourth quarter of 2018 , which were a result of rising commodity prices during the first nine months of 2018 , versus the fourth quarter of 2017 , we believe that due to the combination of our fee structure change along with our increased third party supply we were able to make progress in lowering our cost of feedstock during the fourth quarter . this process takes time to implement and we anticipate seeing improvements to our margins during this first quarter of 2019 related to these changes . our black oil segment 's volume decreased approximately 8 % during the three months ended december 31 , 2018 compared to the same period in 2017 . story_separator_special_tag our revenues and cost of revenues are significantly impacted by fluctuations in commodity prices ; decreases in commodity prices typically result in decreases in revenue and cost of revenues . our gross profit is to a large extent a function of the market discount we are able to obtain in purchasing feedstock , as well as how efficiently management conducts operations . set forth below , we have disclosed a quarter-by-quarter summary of our statements of operations and statements of operations by segment information for the quarters ended december 31 , september 30 , june 30 , and march 31 , 2018 and 2017 , respectively . replace_table_token_7_th 59 replace_table_token_8_th the below graph charts our total quarterly revenue over time from march 31 , 2017 to december 31 , 2018 : story_separator_special_tag t > we had total liabilities of $ 33,171,401 as of december 31 , 2018 , including current liabilities of $ 16,995,611 and long-term liabilities of $ 16,175,790 , which included $ 14,402,179 of long-term debt representing the term loan with encina ( discussed below ) , and $ 1,481,692 of derivative liability related to warrants granted in connection with our series b and b1 preferred stock . we had working capital of $ 6,547,301 as of december 31 , 2018 , compared to working capital of $ 3,523,548 as of december 31 , 2017 . the increase in working capital is mainly due to the increase in our current assets in our operations . our future operating cash flows will vary based on a number of factors , many of which are beyond our control , including commodity prices , the cost of recovered oil , and the ability to turn our inventory . other factors that have affected and are expected to continue to affect earnings and cash flow are transportation , processing , and storage costs . over the long term , our operating cash flows will also be impacted by our ability to effectively manage our administrative and operating costs . additionally , we may incur future capital expenditures related to new refining facilities . the company financed insurance premiums through various financial institutions bearing interest rates from 4.00 % to 4.52 % . all such premium finance agreements have maturities of less than one year and have a balance of $ 999,152 at december 31 , 2018 . on march 1 , 2018 , the company obtained one capital lease . payments are $ 908 per month for the three years and the amount of the capital lease obligation was $ 22,390 at december 31 , 2018 . on may 29 , 2018 , the company obtained one capital lease . payments are $ 26,305 per quarter for four years and the amount of the capital lease obligation was $ 349,822 at december 31 , 2018 . credit and guaranty agreement and revolving credit facility with encina business credit , llc effective february 1 , 2017 , we , vertex operating , and substantially all of our other operating subsidiaries , other than e-source , entered into a credit agreement ( the “ ebc credit agreemen t ” ) with encina business credit , llc as agent ( the “ agent ” or “ ebc ” ) and encina business credit spv , llc and crowdout capital llc as lenders thereunder ( the “ ebc lenders ” ) . pursuant to the ebc credit agreement , and the terms thereof , the ebc lenders agreed to loan us up to $ 20 million , provided that the amount outstanding under the ebc credit agreement at any time can not exceed 50 % of the value of the operating plant facilities and related machinery and equipment owned by us ( not including e-source ) . 61 amounts borrowed under the ebc credit agreement bear interest at 12 % , 13 % or 14 % per annum , based on the ratio of ( a ) ( i ) consolidated ebitda for such applicable period minus ( ii ) capital expenditures made during such period , minus ( iii ) the aggregate amount of income taxes paid in cash during such period ( but not less than zero ) to ( b ) the sum of ( i ) debt service charges plus ( ii ) the aggregate amount of all dividend or other distributions paid on capital stock in cash for the most recently completed 12 month period ( which ratio falls into one of the three following tiers : less than 1 to 1 ; from 1 to 1 to less than 1.45 to 1 ; or equal to or greater than 1.45 to 1 , which together with the value below , determines which interest rate is applicable ) and average availability under the revolving credit agreement ( defined below ) ( which falls into two tiers : less than $ 2.5 million and greater than or equal to $ 2.5 million , which together with the calculation above , determines which interest rate is applicable ) , as described in greater detail in the ebc credit agreement ( increasing by 2 % per annum upon the occurrence of an event of default ) . interest on amounts borrowed under the ebc credit agreement is payable by us in arrears , on the first business day of each month , beginning on the first business day of the first full month following the closing , together with required $ 75,000 monthly principal repayments . we also have the right to make voluntary repayments of the amount owed under the ebc credit agreement in amounts equal to or greater than $ 100,000 , from time to time . the interest rate is 12 % at december 31 , 2018 . the ebc credit agreement terminates on february 1 , 2020 , on which date we are required to repay the outstanding balance owed thereunder and any accrued and unpaid interest thereon . the

