our results in this segment are driven primarily by the number of field personnel that perform services for our customers , the fees that we charge for those services ( which depend on the type and number of field personnel used on a particular project ) , the type of equipment used and the fees charged for the utilization of that equipment , and the nature and duration of the project . we generate revenue in our water services segment primarily by treating flowback and produced water and injecting the saltwater into our saltwater disposal facilities . our water services results are driven primarily by the volumes of produced water and flowback water we receive and the fees we charge for our services . these fees are charged on a per-barrel basis under contracts that are short-term in nature and vary based on the quantity and type of saltwater disposed , competitive dynamics , and operating costs . the volumes of saltwater disposed at our saltwater disposal facilities are driven by water volumes generated from existing oil and natural gas wells during their useful lives and the development of new wells located near our facilities . producers ' willingness to engage in new drilling is determined by a number of factors , the most important of which are the prevailing and projected prices of oil , natural gas , and natural gas liquids , the cost to drill and operate a well , the availability and cost of capital , and environmental and governmental regulations . we generally expect the level of drilling to positively correlate with long-term trends in prices of oil , natural gas , and natural gas liquids . we also generate revenue by managing one saltwater disposal facility . in addition , for minimal marginal cost , we generate revenue by selling residual oil we recover from the flowback and produced water . our ability to recover residual oil is dependent upon the residual oil content in the saltwater we treat , which is , among other things , a function of water type , chemistry , source , and temperature . generally , where outside temperatures are lower , there is less residual oil content and separation is more difficult . thus , our residual oil recovery during the winter season is usually lower than our recovery during the summer season . additionally , residual oil content will decrease if , among other things , producers begin recovering higher levels of residual oil in saltwater prior to delivering such saltwater to us for treatment . how we evaluate our operations our management uses a variety of financial and operating metrics to analyze our performance . we view these metrics as significant factors in assessing our operating results and profitability . these metrics include : ● inspector headcount in pipeline inspection ; ● field personnel headcount and utilization in pipeline & process services ; ● saltwater disposal and residual oil volumes in water services ; ● operating expenses ; ● segment gross margin ; ● safety metrics ; ● adjusted ebitda ; ● maintenance and expansion capital expenditures ; and ● distributable cash flow . 62 inspector headcount the amount of revenue we generate in our pipeline inspection segment depends primarily on the number of inspectors that perform services for our customers . the number of inspectors engaged on projects is driven by the type of project , prevailing market rates , the age and condition of customers ' midstream pipelines , gathering systems , miscellaneous infrastructure , distribution systems , and the legal and regulatory requirements relating to the inspection and maintenance of those assets . field personnel headcount and utilization the amount of revenue we generate in our pipeline & process services segment depends primarily on the number of field personnel that perform services for our customers and the fees that we charge for those services , which depend on the type and number of field personnel used on a particular project , the type of equipment used and the fees charged for the utilization of that equipment , and the nature and the duration of the project . the number of field personnel engaged on projects is driven by the type of project , the size and length of the pipeline being inspected , the complexity of services provided , and the utilization of our work force and equipment . the employees of the pipeline & process services segment who perform work in the field are full-time employees , and therefore represent fixed costs ( in contrast to the employees of the pipeline inspection segment who perform work in the field , most of whom only earn wages when they are performing work for a customer and whose wages are therefore primarily variable costs ) . saltwater disposal and residual oil volumes the amount of revenue we generate in the water segment depends primarily on the volume of produced water and flowback water that we dispose for our customers pursuant to published or negotiated rates , as well as the volume of residual oil that we sell pursuant to rates that are determined based on the quality of the oil sold and prevailing oil prices . most of the revenue generated from water delivered to our facilities by truck is generated pursuant to contracts that are short-term in nature . most of the revenue generated from water delivered to our facilities by pipeline is generated pursuant to contracts that are several years in duration . the volumes of saltwater disposed at our saltwater disposal facilities are driven by water volumes generated from existing oil and natural gas wells during their useful lives and development drilling and production volumes from new wells located near our facilities . story_separator_special_tag during 2018 , 94 % of our volumes were produced water and 45 % of our volumes were delivered via ten pipelines , including two that we constructed and own . we continue to focus on pipeline water opportunities to secure additional long-term volumes of produced water for the life of the oil and gas wells ' production . in july of 2017 , a lightning strike at our grassy butte saltwater disposal facility initiated a fire that destroyed the surface storage equipment at the facility . it did not damage our pumps , electrical , housing , office , or downhole facilities . we had insurance covering the surface facilities with a reasonable deductible . we rebuilt and reopened the grassy butte facility in june 2018. in january of 2018 , we sold our subsidiary that owned a saltwater disposal facility in pecos , texas to an unrelated party for $ 4.0 million of cash proceeds and a perpetual royalty interest in the future revenues of the facility . in may of 2018 , we sold our subsidiary that owns a saltwater disposal facility in orla , texas to an unrelated party for $ 8.2 million . we used the proceeds from these sales to reduce our outstanding debt . pacific gas and electric bankruptcy pg & e corporation and its wholly-owned subsidiary pacific gas and electric company ( collectively , “ pg & e ” ) filed for bankruptcy protection on january 29 , 2019. pg & e cited as the reason for its bankruptcy filing the fact that pg & e might become liable for paying damages to those affected by certain wildfires that occurred in 2017 and 2018. regulators have completed investigations and have found pg & e responsible for certain of the wildfires and not responsible for others . investigations of certain of the other wildfires are ongoing . pg & e has asserted that filing for bankruptcy protection will enable it to continue its normal operations until any liabilities associated with the wildfires can be resolved . pg & e is a significant customer that accounted for $ 43.4 million of the revenue and $ 6.4 million of the gross margin of our pipeline inspection segment during the year ended december 31 , 2018. as of december 31 , 2018 , the assets on our consolidated balance sheet included $ 10.3 million of accounts receivable from pg & e . we collected $ 1.0 million of this balance in january 2019 prior to pg & e 's bankruptcy filing . we generated $ 2.8 million of revenue from pg & e during the period from january 1 , 2019 through january 28 , 2019 , bringing the total accounts receivable from pg & e to $ 12.1 million as of the date of the bankruptcy filing . our relationship with pg & e remains strong and they have advised us that they wish to continue receiving our services and that we will be paid in the normal course for services provided after the bankruptcy filing . we have continued to provide services to pg & e after the bankruptcy filing and value our business relationship . we have also been advised that pg & e continues to view us as an important and reliable vendor . our receivables for services provided before the bankruptcy filing will need to work through the bankruptcy court process . on january 29 , 2019 , pg & e filed a motion with the bankruptcy court ( the “ court ” ) requesting that the court grant pg & e authority to pay certain pre-petition claims to certain key suppliers . the motion did not specify to which suppliers the motion would apply , but the motion did describe the nature of the work that those suppliers perform . once such category includes “ operational integrity suppliers ” , which are those that provide “ essential and specialized goods and services so that [ pg & e ] can provide safe and reliable…natural gas service to their customers ' homes and businesses , while remaining in compliance with all applicable state and federal laws and regulations . ” a second category includes “ regulatory compliance vendors ” , which include “ entities that provide goods and services related to [ pg & e 's ] regulatory compliance obligations ” . a third category includes “ specialized and integrated vendors ” . the motion states that pg & e “ must obtain the services of a [ specialized vendor ] because state and federal laws and regulations require vendors to possess certain certifications , permits , licenses , particular knowledge , or technical ‘ know-how ' . ” the motion states that pg & e is working to develop a final list of vendors that are subject to the motion . the motion indicates that pg & e would contact each such vendor and attempt to negotiate timely payment of a portion the pre-petition receivables owed to that vendor , in return for which the vendor would agree to continue to provide services to pg & e under the same terms that were in effect prior to the bankruptcy filing . any pre-petition receivables not settled in this manner would continue to be subject to the claims resolution process in the bankruptcy proceeding . the court granted this motion . based on the nature of the services we provide to pg & e , which are mandated by state and federal requirements , which are critical to the safety of pg & e 's natural gas infrastructure , and which require specialized knowledge and certifications , we believe we could reasonably be included on the list of vendors that are subject to the order granting this motion ; however , pg & e has not yet told us whether or not we are on the list of vendors that are subject to the order granting this motion . the order

cash flows the following table sets forth a summary of the net cash provided by ( used in ) operating , investing and financing activities for the periods identified . replace_table_token_18_th 82 operating activities . during the year ended december 31 , 2018 , we generated operating cash flows of $ 15.4 million . prior to consideration of changes in working capital , operating cash flows during the year ended december 31 , 2018 were $ 16.0 million , consisting of net income of $ 12.1 million plus non-operating-cash expenses of $ 3.9 million ( non-cash expenses include depreciation and amortization , equity-based compensation , foreign currency gains/losses , and gains/losses on the sale or impairment of assets , among others ) . during the year ended december 31 , 2018 , changes in working capital reduced operating cash flows by $ 0.6 million . during periods of revenue growth , changes in working capital typically reduce operating cash flows , based on the fact that we pay our employees before we collect our accounts receivable from our customers . during the year ended december 31 , 2017 , we generated operating cash flows of $ 8.3 million . prior to consideration of changes in working capital , operating cash flows during the year ended december 31 , 2017 were $ 8.9 million , consisting of a net loss of $ 1.9 million plus non-operating-cash expenses of $ 10.8 million ( non-cash expenses include depreciation and amortization , equity-based compensation , foreign currency gains/losses , and gains/losses on the sale or impairment of assets , among others ) . non-cash expenses included $ 1.8 million expense that was incurred by holdings for our benefit but not charged to us . during the year ended december 31 , 2017 , changes in working capital reduced operating cash flows by $ 0.6 million . during periods of revenue growth , changes in working capital typically reduce operating cash flows , based on the fact that we pay our employees before we collect our accounts receivable from our customers .


 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.
     ```cash flows the following table sets forth a summary of the net cash provided by ( used in ) operating , investing and financing activities for the periods identified . replace_table_token_18_th 82 operating activities . during the year ended december 31 , 2018 , we generated operating cash flows of $ 15.4 million . prior to consideration of changes in working capital , operating cash flows during the year ended december 31 , 2018 were $ 16.0 million , consisting of net income of $ 12.1 million plus non-operating-cash expenses of $ 3.9 million ( non-cash expenses include depreciation and amortization , equity-based compensation , foreign currency gains/losses , and gains/losses on the sale or impairment of assets , among others ) . during the year ended december 31 , 2018 , changes in working capital reduced operating cash flows by $ 0.6 million . during periods of revenue growth , changes in working capital typically reduce operating cash flows , based on the fact that we pay our employees before we collect our accounts receivable from our customers . during the year ended december 31 , 2017 , we generated operating cash flows of $ 8.3 million . prior to consideration of changes in working capital , operating cash flows during the year ended december 31 , 2017 were $ 8.9 million , consisting of a net loss of $ 1.9 million plus non-operating-cash expenses of $ 10.8 million ( non-cash expenses include depreciation and amortization , equity-based compensation , foreign currency gains/losses , and gains/losses on the sale or impairment of assets , among others ) . non-cash expenses included $ 1.8 million expense that was incurred by holdings for our benefit but not charged to us . during the year ended december 31 , 2017 , changes in working capital reduced operating cash flows by $ 0.6 million . during periods of revenue growth , changes in working capital typically reduce operating cash flows , based on the fact that we pay our employees before we collect our accounts receivable from our customers .
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 Suspicious Activity Report : our results in this segment are driven primarily by the number of field personnel that perform services for our customers , the fees that we charge for those services ( which depend on the type and number of field personnel used on a particular project ) , the type of equipment used and the fees charged for the utilization of that equipment , and the nature and duration of the project . we generate revenue in our water services segment primarily by treating flowback and produced water and injecting the saltwater into our saltwater disposal facilities . our water services results are driven primarily by the volumes of produced water and flowback water we receive and the fees we charge for our services . these fees are charged on a per-barrel basis under contracts that are short-term in nature and vary based on the quantity and type of saltwater disposed , competitive dynamics , and operating costs . the volumes of saltwater disposed at our saltwater disposal facilities are driven by water volumes generated from existing oil and natural gas wells during their useful lives and the development of new wells located near our facilities . producers ' willingness to engage in new drilling is determined by a number of factors , the most important of which are the prevailing and projected prices of oil , natural gas , and natural gas liquids , the cost to drill and operate a well , the availability and cost of capital , and environmental and governmental regulations . we generally expect the level of drilling to positively correlate with long-term trends in prices of oil , natural gas , and natural gas liquids . we also generate revenue by managing one saltwater disposal facility . in addition , for minimal marginal cost , we generate revenue by selling residual oil we recover from the flowback and produced water . our ability to recover residual oil is dependent upon the residual oil content in the saltwater we treat , which is , among other things , a function of water type , chemistry , source , and temperature . generally , where outside temperatures are lower , there is less residual oil content and separation is more difficult . thus , our residual oil recovery during the winter season is usually lower than our recovery during the summer season . additionally , residual oil content will decrease if , among other things , producers begin recovering higher levels of residual oil in saltwater prior to delivering such saltwater to us for treatment . how we evaluate our operations our management uses a variety of financial and operating metrics to analyze our performance . we view these metrics as significant factors in assessing our operating results and profitability . these metrics include : ● inspector headcount in pipeline inspection ; ● field personnel headcount and utilization in pipeline & process services ; ● saltwater disposal and residual oil volumes in water services ; ● operating expenses ; ● segment gross margin ; ● safety metrics ; ● adjusted ebitda ; ● maintenance and expansion capital expenditures ; and ● distributable cash flow . 62 inspector headcount the amount of revenue we generate in our pipeline inspection segment depends primarily on the number of inspectors that perform services for our customers . the number of inspectors engaged on projects is driven by the type of project , prevailing market rates , the age and condition of customers ' midstream pipelines , gathering systems , miscellaneous infrastructure , distribution systems , and the legal and regulatory requirements relating to the inspection and maintenance of those assets . field personnel headcount and utilization the amount of revenue we generate in our pipeline & process services segment depends primarily on the number of field personnel that perform services for our customers and the fees that we charge for those services , which depend on the type and number of field personnel used on a particular project , the type of equipment used and the fees charged for the utilization of that equipment , and the nature and the duration of the project . the number of field personnel engaged on projects is driven by the type of project , the size and length of the pipeline being inspected , the complexity of services provided , and the utilization of our work force and equipment . the employees of the pipeline & process services segment who perform work in the field are full-time employees , and therefore represent fixed costs ( in contrast to the employees of the pipeline inspection segment who perform work in the field , most of whom only earn wages when they are performing work for a customer and whose wages are therefore primarily variable costs ) . saltwater disposal and residual oil volumes the amount of revenue we generate in the water segment depends primarily on the volume of produced water and flowback water that we dispose for our customers pursuant to published or negotiated rates , as well as the volume of residual oil that we sell pursuant to rates that are determined based on the quality of the oil sold and prevailing oil prices . most of the revenue generated from water delivered to our facilities by truck is generated pursuant to contracts that are short-term in nature . most of the revenue generated from water delivered to our facilities by pipeline is generated pursuant to contracts that are several years in duration . the volumes of saltwater disposed at our saltwater disposal facilities are driven by water volumes generated from existing oil and natural gas wells during their useful lives and development drilling and production volumes from new wells located near our facilities . story_separator_special_tag during 2018 , 94 % of our volumes were produced water and 45 % of our volumes were delivered via ten pipelines , including two that we constructed and own . we continue to focus on pipeline water opportunities to secure additional long-term volumes of produced water for the life of the oil and gas wells ' production . in july of 2017 , a lightning strike at our grassy butte saltwater disposal facility initiated a fire that destroyed the surface storage equipment at the facility . it did not damage our pumps , electrical , housing , office , or downhole facilities . we had insurance covering the surface facilities with a reasonable deductible . we rebuilt and reopened the grassy butte facility in june 2018. in january of 2018 , we sold our subsidiary that owned a saltwater disposal facility in pecos , texas to an unrelated party for $ 4.0 million of cash proceeds and a perpetual royalty interest in the future revenues of the facility . in may of 2018 , we sold our subsidiary that owns a saltwater disposal facility in orla , texas to an unrelated party for $ 8.2 million . we used the proceeds from these sales to reduce our outstanding debt . pacific gas and electric bankruptcy pg & e corporation and its wholly-owned subsidiary pacific gas and electric company ( collectively , “ pg & e ” ) filed for bankruptcy protection on january 29 , 2019. pg & e cited as the reason for its bankruptcy filing the fact that pg & e might become liable for paying damages to those affected by certain wildfires that occurred in 2017 and 2018. regulators have completed investigations and have found pg & e responsible for certain of the wildfires and not responsible for others . investigations of certain of the other wildfires are ongoing . pg & e has asserted that filing for bankruptcy protection will enable it to continue its normal operations until any liabilities associated with the wildfires can be resolved . pg & e is a significant customer that accounted for $ 43.4 million of the revenue and $ 6.4 million of the gross margin of our pipeline inspection segment during the year ended december 31 , 2018. as of december 31 , 2018 , the assets on our consolidated balance sheet included $ 10.3 million of accounts receivable from pg & e . we collected $ 1.0 million of this balance in january 2019 prior to pg & e 's bankruptcy filing . we generated $ 2.8 million of revenue from pg & e during the period from january 1 , 2019 through january 28 , 2019 , bringing the total accounts receivable from pg & e to $ 12.1 million as of the date of the bankruptcy filing . our relationship with pg & e remains strong and they have advised us that they wish to continue receiving our services and that we will be paid in the normal course for services provided after the bankruptcy filing . we have continued to provide services to pg & e after the bankruptcy filing and value our business relationship . we have also been advised that pg & e continues to view us as an important and reliable vendor . our receivables for services provided before the bankruptcy filing will need to work through the bankruptcy court process . on january 29 , 2019 , pg & e filed a motion with the bankruptcy court ( the “ court ” ) requesting that the court grant pg & e authority to pay certain pre-petition claims to certain key suppliers . the motion did not specify to which suppliers the motion would apply , but the motion did describe the nature of the work that those suppliers perform . once such category includes “ operational integrity suppliers ” , which are those that provide “ essential and specialized goods and services so that [ pg & e ] can provide safe and reliable…natural gas service to their customers ' homes and businesses , while remaining in compliance with all applicable state and federal laws and regulations . ” a second category includes “ regulatory compliance vendors ” , which include “ entities that provide goods and services related to [ pg & e 's ] regulatory compliance obligations ” . a third category includes “ specialized and integrated vendors ” . the motion states that pg & e “ must obtain the services of a [ specialized vendor ] because state and federal laws and regulations require vendors to possess certain certifications , permits , licenses , particular knowledge , or technical ‘ know-how ' . ” the motion states that pg & e is working to develop a final list of vendors that are subject to the motion . the motion indicates that pg & e would contact each such vendor and attempt to negotiate timely payment of a portion the pre-petition receivables owed to that vendor , in return for which the vendor would agree to continue to provide services to pg & e under the same terms that were in effect prior to the bankruptcy filing . any pre-petition receivables not settled in this manner would continue to be subject to the claims resolution process in the bankruptcy proceeding . the court granted this motion . based on the nature of the services we provide to pg & e , which are mandated by state and federal requirements , which are critical to the safety of pg & e 's natural gas infrastructure , and which require specialized knowledge and certifications , we believe we could reasonably be included on the list of vendors that are subject to the order granting this motion ; however , pg & e has not yet told us whether or not we are on the list of vendors that are subject to the order granting this motion . the order

